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Tools

$14.95
Because even your reliable Mavic wheels will eventually need truing, Park offers their Spoke Wrench For Mavic Wheel Systems. This comfortable, vinyl-coated, double-ended spoke wrench easily accesses and turns Mavic nipples. One end fits Mavic 6-spline, 9mm threaded eyelets and the other fits their 7-spline, 6.4mm nipples.
$19.99
Park Tool's Pedal Wrench Crow Foot is used with any 3/8” drive torque wrench to verify pedals are torqued to the correct spec. The TWB-15 is laser cut, heat treated and plated for long life.
$5.95 - $7.95
Park's Shop Screwdrivers are pro-quality tools featuring durable and precise heat-treated chrome-vanadium tips and shafts and dual-density handles for an excellent grip.
$16.79
- Used when facing BB86/92 bottom bracket shells and reaming is not required - Used in conjunction with HTR-1 head tube reaming and facing set (PK-6710), 750.2 centering cone adapter (PK-6735) and 690-XL facing cutter (PK-6730)
$349.95
The BX-2.2 features updated pallet configuration and storage options to help you keep your tools secure and easily accessible. The expanded custom designed tool pallets, including dual-sided pallet wings, are all housed in a virtually indestructible composite travel case. Designed and built for the traveling mechanic who demands the best! - Custom designed tool-holding pallets with loops and pockets - Folding, dual-sided pallet wings - Front tool pallet that stores securely inside during transport - Dent-proof composite shell built around an aluminum frame - Key lock - Nominal dimensions: 19" x 14.85" x 8.5" (48.25 cm x 37.7 cm x 21.6 cm), 13.2 lbs. (6 kg)
$124.95
The CRS-15.2 uses two different insert rings to install bearing races on the 1.5-inch and 1-1/4-inch forks. The bearing surface is spared a direct hit by using aluminum inserts. Using a hammer, tap firmly on the end cap of the tube and seat the race into its proper place safely and accurately. Included extension allows work on fork steering tubes up to 425mm. - SHIS terminology: The CRS-15 services crown races in SHIS 33 and 40.
$16.95
Park's Hex Wrenches are every mechanic's best friend. They are constructed from industrial quality steel for durability and feature chamfered tips for a precision fit. And, their convenient L shape is perfect for jobs that require lots of leverage or for getting to hard-to-reach bolts.
$63.95
Keep your most commonly used tools close at hand with this clever, multi-function tool holder. The TK-4 was painstakingly designed with pockets and holders for specific tool shapes and sizes as well as some generic storage areas. The Tool Kaddie rotates for easy access and is molded from a durable composite material. - Stand Mount mounts to any Park Tool Professional Shop Stand (all versions of PRS-2, -3, -4, and -33) - Specific slots and holders for 3-way hexes, screwdrivers, P-Handles, pliers/cutters - Generic slots and holders to hold a wide variety of tools and small parts - Mounting location to directly attach HXH-2P or HXH-2T P-Handle Holders (sold separately) - Built-in receiver port for PTH-1 Paper Towel Holder (sold separately)
$23.99
The 761s Reaming and Facing Cutters are used to machine head tubes using integrated headsets with a 42 mm bearing and 45 degree angular contact used by the Campagnolo® Hiddenset standard. FSA® and other manufacturers also make headsets in this standard. Includes upper and lower cutters.
$74.95
Park Tool's Thru Axle Adaptors make it possible to adapt all Park Tool Truing Stands to work with 12mm, 15mm, 20mm, and 25mm thru axle front wheels, as well as Cannondale Lefty wheels (each sold separately). The TS-TA also work with the rear 135mm thru axle hubs in the TS-2.2 and TS-3. The TS-TA when used in the TS-8, TS-25, TS-15, TS-7 or TS-5 will work with all rear thru axle hubs. For thru axle hubs greater than 135 (142, 150, 157, etc.) in the TS-2.2, use the TS-2TA Thru Axle Adaptors (sold separately).
$385.34
- The HBP-1 is designed to quickly and accurately press bearings into a wide variety of cartridge bearing-type bicycle hubs. - Quick release design for fast tool installation and removal - Includes two bearing presses and precision machined aluminum pilots, bushings, and spacers - Works with more than 20 different cartridge bearing sizes and multiple axle configurations
$36.73 - $109.20
Frame and Fork Taps will become a lifesaver at some time for virtually every mechanic. These taps are made of high-carbon steel and are precision ground. Park Tool Frame and Fork Taps cut easily and fit conventional tap handles.
$61.99
Clean out or restore damaged threads in crank arms with Park Tool's Pedal Taps. They're sold as a set of right and left hand threads. Made of high carbon steel, precision ground, and hardened to stay sharp, they cut easily and fit all conventional tap handles. • Includes a set of 2 taps, 9/16" x 20 tpi • Made of high carbon steel, precision ground, and hardened to stay sharp • Fits all conventional tap handles The tap drill size for a 9/16-inch x 20 tpi thread is nominally 33/64-inch.
$24.95
The 15-inch SWB-15 is a forged steel breaker bar with a 3/8-inch square drive head that pivots 180º. Features a long, knurled handle, which is extremely useful when extra leverage is needed to remove stubborn fasteners.
$18.49
- New extra-long 27cm hex key and second ball-end deliver leverage and speed - Specifically designed for quick and easy installation and removal of pedals and cranks - Ergonomic dual-density screw driver handle - Designed to stand up to the harsh conditions of professional use Pedals featuring a back-side hexagon broach are now standard on many modern bicycles in 6mm and 8mm sizes. Pedro's led the way with our 6mm hex pedal driver specifically designed for quick-and-easy pedal installation and removal. Features include an ergonomic dual-density screw driver handle for comfort and control, a new extra-long 27cm hex key for exceptional leverage, a second ball end for quick and easy installation or removal, and heat-treated S2 tool steel construction for the ultimate in strength and lasting performance. Backed by Pedro's lifetime warranty.
$12.49
- Perfect for the common 5mm hex hardware found on every modern bicycle. - Ergonomic dual-density screw driver handle. - Features extra long hex key and second ball-end. - Designed to stand up to the harsh conditions of professional use. The 5mm hex is by far, the most common size hex found on modern bicycle. Inspired by our other hex driver sizes, which are some of the most comfortable and ergonomic hex wrenches we've ever used, we decided to bring you these features in the common 5mm size. Features include an ergonomic dual-density screw driver handle for comfort and control, an extra long hex key for exceptional leverage, a second ball end for quick and easy installation or removal, and heat-treated S2 tool steel construction for the ultimate in strength and lasting performance. Backed by Pedro's lifetime warranty.
$15.49
The Torx-style fastener is becoming the new standard for modern bicycles and components. Pedro's led the way offering the first Y-style Torx wrench to meet the demand. Recently named VeloNews Editor's Pick for Best 3-Way Wrench, Pedro's popular Y-Wrenches feature heat-treated tool steel construction and a durable plastic body designed to stand up to the harsh conditions of professional use. The new, improved ergonomic design features a refined body shape for improved fit and comfort, new quick-spin bit sleeves for speed and versatility, and bit-size indication for quick tool identification. Includes T10,T25, and T30 sizes, perfect for the most common Torx hardware sizes found on modern bicycles and components. - New improved ergonomic y-style handle design - Features refined body shape, quick-spin bit sleeves, longer bits, and bit-size indication - Designed to stand up to the harsh conditions of professional use - Backed by Pedro's lifetime warranty.
$29.99
7-Function Premium Multi-Tool - Micro Lever Compatible: Choose from five colors. - Backed by Pedro's Lifetime Warranty and Rust-Free Guarantee™. - Hex Wrenches: 2, 3, 4, 5, 6mm. - T25 torx and Flat Blade screwdriver. - 70 grams. Rx Micro multi-tools deliver the perfect balance of size, weight, and function, ready for trailside repairs and daily adjustments. Designed for performance and durability with 6061 aluminum body, premium CrMo tool steel bits, and an anti-corrosion finish backed by our Rust-Free Guarantee™. Each new Rx Micro model now includes a 2mm hex wrench.
$70.00
The dropout saver system is an alternative to replacing badly bent or damaged derailleur dropouts. Rather than replacing the damaged dropout completely, simply drill out the damaged threads, install a dropout saver, and realign the dropout. Kit includes: - (1) 15/32-inch reduced shank drill bit - (2) DS-1 wide dropout savers     - (3) DS-2 narrow dropout savers    
$42.95
The Compact Pocket Rescue tool is back! The first CPR Tool was first developed in 1992 out of race necessity. While leading a World Cup XC, Thomas Frischknecht's stem slipped, causing him to stop, tighten it, and lose valuable time. Tom Ritchey knew he couldn't afford to send his riders across the world to race and have them not finish due to simple mechanicals. Thus, the CPR was born to solve this problem. Lightweight and reliable, the CPR tool was the first multi-tool designed to aid a rider in need while out riding or racing. Now the CPR12+ weighs in at just 96 grams and this investment cast CPR tool packs over 12 individual tools into one small easy to stash utensil. - Compact 2x3" design features a chain breaker, tire lever, Phillips screw driver, T20, T25, 14g spoke wrench, Allen keys 2-6mm and 8mm - Resilient investment cast steel keys with alloy lever - Only 96 grams
$11.95
Park's Pin Spanners are designed for maximum usefulness and versatility at the best value. Tough high-carbon tool steel is used to ensure long life and the handles are vinyl coated for a great grip and color-coded for easy identification. The red-handled SPA-2 is for turning the bearing cones on most freewheels and the one-key-release rings on crankarms.
$38.60
• 15mm L-shaped hex wrench to fit Shimano rear thru-axle freehubs • Through-hardened industrial quality steel • Chamfered tips for a precision fit
$25.95
These shop-quality L-shaped hex wrenches have a genuine Bondhus balldriver tip on the long arm (excluding the 10mm) for hard-to-reach bolt heads and a straight tip on the short arm for high-torque applications. The HXS-1.2 includes a handy portable tool organizer/holder and it's hinged for easy access. • Includes 1.5, 2, 2.5, 3, 4, 5, 6, 8, and 10 mm sizes • Wrench tips are precision chamfered for a clean, tight fit • Made from industrial-quality Bondhus Protanium high torque steel
$32.95
This combination chain whip and freewheel / lockring remover wrench is heat treated to prevent bending and flexing, with a molded handle for comfort. - 1/8-inch model works on 1/8-inch chains and sprockets - 1-inch (25.4mm) box-end wrench fits Park Tool Freewheel/Cassette Lockring Tools - Features hardened pins to keep the chain in place
$129.95
No more need to hold wheels between your knees, balance on a bench top or ask for help. The WH-1 Wheel Holder firmly holds thru axle and quick release wheels at three convenient positions. It’s like having a strong helper to hold wheels during cleaning, tire and tube work, hub work, cassette work, and tubeless installation. The WH-1 can be bolted or clamped directly to a bench or installed in a bench vise. Uses and Features: - Quick and easy access to hold virtually any wheel to perfectly position your work for a variety of tasks including but not limited to: - Wheel building -Cassette removal and installation - Tire and tube removal and installation - Tubeless tire work - General cleaning - Hub work - Holds wheel at vertical, 35 degrees from vertical, and horizontal positions - Accepts 12, 15, and 20mm thru axles and 5mm skewers - E-Nickel finish for durability
$29.95
The 4th edition of the Big Blue Book of Bicycle Repair is updated with the latest information, procedures and techniques and covers everything from minor adjustments to complete overhauls. The BBB-4 features clear, step-by-step instructions, high quality color photos and useful charts and graphs to thoroughly explain and demonstrate hundreds of repairs. Written by one of the world’s leading authorities on bicycle repair and maintenance, Park Tool Director of Education, Calvin Jones, the Big Blue Book is the perfect reference guide for nearly any level mechanic and every bike. New information and topics included in the BBB 4th edition: - 12-speed and 1x drivetrains - Tubeless tires - Disc brakes - Electronic shifting - New wheel building content - Updated headset and bottom bracket standards - Updated torque specifications - Updated troubleshooting tables
$16.95 - $31.95
Professional quality T-Handle hex wrench built for speed, efficiency, leverage and a perfect fit. - Carefully selected combination of Chrome Vanadium and S-2 tool steels - Unique anodized aluminum Speed Spinner makes running long bolts in and out quick and effortless - Machined, chamfered tips allow easier insertion into hex fittings - Integrated “Strip-Gripper” twisted hex that makes removal of most bolts with stripped or oversized hexes fast and easy - Sliding T-handle creates increased leverage and multiple access positions
$23.95
Park Tool's professional-quality Snap Ring Pliers are made from forged, heat-treated cro-moly steel with a return spring and vinyl-dipped grips. The RP-3 has 1.3mm tips on bent nose blades for medium, external snap rings.
$19.99
The ultimate trailside companion. These high tensile steel multi-tools feature a precise fit and finish and side grips for a secure handhold even with gloves on. The m10 includes: Hex wrenches: #2, 2.5, 3, 4, 5, 6, 8 Screwdrivers: Phillips #2, flat #2 Torx: t-25 Length: 89 mm Weight: 124g Warranty: Lifetime
$449.99
The DT-5.2 is engineered and built to accurately face front or rear disc brake mounts so they are precisely aligned to the rotor. - Faces any IS Mount, Post Mount, or new Shimano Flat Mount, including low clearance, chainstay mounts - Telescoping axle adaptors allow use with any configuration of open or thru-axle dropouts and dropout widths (including Boost 110, Boost 148 and all fat bike axles) - Includes two facing cutters: IS Mounts Post and Flat Mounts - Includes storage case
$34.99
The Bottom Bracket Wrench removes and installs Shimano Hollowtech II, Race Face X-type, FSA MegaExo, Campagnolo Ultra-Torque and TruVativ Giga X-pipe bottom brackets. Laser cut for a precise fit, one end of the BBT-9 securely engages the 16 cup notches, while the other end engages the 8 internal splines of the crankarm adjustment cap.
$8.95 - $10.95
They always say, the right tool for the right job. Park's P-handled Torx Wrenches are available in T6, T8, T10, T15, T20, T25, T30 and T40 sizes. They feature offset handles made from durable nylon with a comfortable, ergonomic design. The wrenches are made of high-torque industrial steel for excellent durability.
$13.44 - $31.50
- Concentrated degreaser and wash that cleans grime, oil and greases gently - Safe on all surfaces
$41.45
Contains the fittings and syringes needed for bleeding Campagnolo disc brakes -Does not include mineral oil - Fits Brand: Campagnolo - Hydraulic Fluid Type: Mineral Oil
$18.99
Classic chain breaker design with Key Chain pin adapter, and adjustable support screw.
$20.40
- Professional wrenches fit internal nipples on many deep section aero rims
$66.00
- Installs and removes threaded cups for 386Evo cranks - Socket type tool for 1/2" drive socket wrenches
$18.69
- Shop-quality fiber reinforced nylon socket with center post for damage-free installation and removal of 16-notch BB cups - Center post helps to fix and stabilize the tool on to the BB cup - 1/2" drive is compatible with ratchet and torque wrenches - Compatibility: Shimano HTII 24mm and SRAM GXP 22/24mm - Size: 16-Notch x 44mm
$15.29
Origin-8's Wood 8-In-1 Mini Tool features a plethora of tools with an excellent wood grip. It features a 2, 2.5, 3, 4, 5, and 6mm hex keys, Phillips and flat-head screwdrivers, and a T-25 Torx
$16.99
- Shop-quality fiber reinforced nylon socket with center post for damage-free installation and removal of 16-notch BB cups - Center post helps to fix and stabilize the tool on to the BB cup - 1/2" drive is compatible with ratchet and torque wrenches - Compatibility: 30mm - Size: 16-Notch x 48.5mm
$33.99
Origin-8's Universal Bleed kit comes with just about everything you would need to tune your hydraulic disc brakes back to perfection. It features two 20ml syringes, three tubes, two 5mm adapters, one 6mm adapter and two hose clamps. Hydraulic fluid is not included.
$35.69
- Dark nickel plated finish - CNC machined arms - Hex keys: 2/3/4/5/6/8mm - T25 Torx - Flat and Phillips screwdrivers - 7, 8, 9, and 10 speed universal chain tool - Bottle opener - Spoke wrenches: 12/14/15/16G, T30 (Mavic spline)
$101.46
Wera torque indicator with fixed torque for hexagon sockets. The slip clutch guarantees a clearly audible and tactile trigger signal when the set torque value is reached, and is then impossible to apply any further torque. The loosening torque is significantly higher than the set tightening torque, so no additional tools are needed for loosening screw connections. The shape of the handle fills the whole hand well and the fingers lie in the softly rounded recessed grips. This ensures optimal, ergonomic power transmission. - T-handle is ideal for transferring controlled tightening torque and high loosening torque - Error-free screwdriving due to non-slip friction clutch and exact torque transmission - Tamper-proof against accidental changing of set torque value - Corrosion-resistant blade
$49.99
Innovative 2-in-1 cycling CO2 dispenser and tubeless tire repair kit simultaneously inflates and seals tubeless tires. Machined aluminum construction is both lightweight and highly durable. Hardened steel reamer scours hole, inserts plug, and inflates tire for an efficient and rapid repair. CNC-machined twist knob manually controls release of CO2 gas. Aluminum canister holds the five included tire plugs and safely stores the reamer when not in use. High-quality tire plugs aggressively seal holes that are too large to be sealed by sealant alone (hole size varies from tire to tire). Sleek, compact design fits in a pocket or straps to your bike with a simple Velcro strap. Note: Sealing performance may vary based on puncture size, tire size, and tire pressure. - Compact tubeless tire repair kit. - Machined aluminum storage tube doubles as a handle. - Combined tire reamer and insertion tool. - Includes five tire plugs. - CO2 cartridges sold separately.
$27.99
- External bottom bracket tool - For use with our 32mm CNC rod, an adjustable wrench, or 3/8" ratchet - External BB tool, 16 notch - 39mm, Shimano 9000, Dura Ace BB92, XTR BB93, Shimano crank dust cap tool, 16mm hex
$9.95
Topeak's Shuttle Levers are strong enough for even the busiest shops; think what they'll do for that tight road tire and fat downhill rubber. These levers are extra long for leverage and are made of engineering-grade plastic with stainless-steel reinforcements down the middle that ensures years of hard use.
$32.99
Elite DOT Bleed Kit replacement fittings for SRAM Bleeding Edge, Formula, Hayes, and Hope - Black seals provide easy identification for use with DOT fluid systems only - Set of 5 fittings
$21.95
- Pocket sized chain tool that mates perfectly with Topeak ratchets and torque tools - Compatible with single and multispeed chains up to 12 speed including Capagnolo chains - Includes a 4/5mm allen key and a chain hook as well as a rubber clip to hold
$25.99
The T-Handle Bit Drive is a versatile, lightweight, 1/4" hex bit drive tool with in-handle bit storage. Designed for use with our Multi-Torque torque indicating bit drive, the T Handle Bit Drive is also a fantastic stand-alone multitool platform. Store up to four standard 1/4" hex bits inside the handle plus one in the magnetic bit drive, or add the compatible Multi-Torque Bit Set to store eight additional bits on board. - 80 gram, 5-function, sliding t-handle, bit-based multitool with 1/4" magnetic drive, and in-handle bit storage. - Compatible with Multi-Torque Bit Set. - Includes 3, 4, 5, 6mm hex and T25 torx bits.
$59.99
The Pro Saw Guide's full metal construction delivers straight, precise, and clean cutting of all threadless steerer tubes from 1" to 1.5", handlebars, and many sizes of seatposts. The efficient design provides a balance of simple form and good work-piece visibility, while also providing secure hold and precise alignment. - Full metal construction with aluminum jaws and hardened steel guide plates for straight cuts every time. - Fits tube sizes from 19mm to 39mm (0.75" to 1.5"); everything from handlebars to 1.5" steerers. - Laser etched sizing scale provides quick reference of jaw position. - Easily set slot width for standard or carbon blades by moving spacer plate position.
$57.95
- A multi-tool that includes a tubeless tire repair kit - 18 individual tools 22.5345mm hexes T25 Torx wrench stainless steel reamer knife plug tool and air stop - Also includes three 5mm thick tire plugs and integrated storage compartment - Vanadium s
$4.07 - $7.09
High-quality Wera L-keys with color-coded, convenient plastic sleeve. The tool is quickly accessible and the ergonomic and pleasant handle is easy on the hands even at low temperatures. The Hex-Plus profile offers a larger contact surface within the screw head. This reduces the notching effects to a minimum and almost completely eliminates the risk of destroying the screw recess. The ball-end on the long arm allows for reliable working even in difficult installation situations. The BlackLaser surface treatment provides outstanding surface protection, even against corrosion, and a long service life. The tools are quickly to hand thanks to the laser-engraved and thereby wear-resistant size markings on the L-keys. - L-keys for hexagonal socket screws - Hex-Plus allows socket head screws to live longer - Color coded, easy-to-grip plastic sleeve, even at low temperatures - Hexagonal ballpoint on the long arm - Wear-resistant size marking
$68.00
Performing the right maintenance on your SRAM and RockShox products not only ensures years of worry-free riding, but will also keep performance optimal and enhance your experience on the bike. Each service interval indicates the maximum number of riding hours designated for each type of recommended maintenance. Depending on the terrain and environmental conditions in your location, your riding style, and skill level, you may see more optimum performance if you service your SRAM and RockShox products at shorter intervals.
$13.99 - $37.08
- Xtreme chain lube is formulated for long-distance and extreme off-road conditions - MFR bonds to metal surfaces and resists build-Up and tackiness, in addition to shedding water
$27.95
The BBT-29 is a double-ended bottom bracket wrench designed to fit 16-notch bearing cups with an outside diameter of 39mm (e.g. Shimano Dura-Ace 9000 series and XTR 980 series) as well as 16-notch bearing cups with an outside diameter of 48.5mm (e.g. FSA MegaEvo).
$20.00
Simply Accurate – Maintenance-free, Reliable and Affordable Our torque tools use intelligent design for accuracy without the need for expensive calibration. An industrial-grade internal spring manufactured within extremely tight tolerances pre-determines torque setting. The tool does not need to be set into calibration and cannot shift out of calibration. Easy to use Ergonomic handle fits your palm with a four-finger grip to make wrenching easier. Tool provides an unmistakable 20 degree overrun when the torque limit is reached. Users can be confident knowing they have the correct tension. Low profile allows the tool to fit into more places for use, overall 60% lower height than tools costing twice as much. Use it like a tool – safe to un-screw! Prestacycle's TorqKey is fast and easy-to-use as an everyday tool. Color-coded tension markings on both sides make it a quick-grab on your workbench. 50% thicker walls in the bit shaft make our tools stronger and more reliable than others. They provide Torque relief in the right (clockwise) screw tightening direction, and hold firm in the left (counterclockwise) unscrew direction. You can unscrew fittings that were just tightened with the TorqKey. This is very handy when making multiple attempts to get a cable adjustment just right. NOTE: Do not use TorqKey to remove stuck, damaged, rusted or over-tightened fittings. More Options Prestacycle TorqKeys are available in 4Nm, 5Nm, 6Nm, 7Nm, 8Nm, 10Nm and 12Nm. Combine TorqKeys with our Ratchets and Bit sets to make a more complete tool set for Bicycle servicing. Standard Magnetic Hex Tip works with our 20 Piece Bicycle Bits set, our long Bicycle bits and any other 1/4" Hex bits. Prestacycle TorqKeys are different… designed from the start with real-world experience on Bicycles. Specifications: - Torque value accurate to + / – 10%. - Provides 20 degree overrun when maximum torque is reached. - Overrun provides user with unmistakable feedback when torque value is reached. - Polymer T-Handle ergonomically designed for comfortable four-finger & palm grip. - Color-coded tension markings on both sides. - 12mm wide Zinc shaft has 50% thicker walls – stronger than other Torque tools. - Magnetic 1/4" hex bit retention makes bit changes easy. - Torque accuracy life-cycle exceeds 5000 cycles. - Simple to Judge – If the logo is worn, the tool is past life. - Replacing the tool costs less than other tool's calibration service. - Height: 64.5 mm, 2 1/2 inches. - Width: 81 mm, 3.18 inches. - Weight: Approx. 75 grams. - 1 Year limited consumer warranty. Disclaimers Check with the manufacturer of your components and fittings for proper torque specifications. Always follow Manufacturer guidelines for installation and removal of nuts, bolts and screws.
$89.99
• Based on the True Pro, the FT-1 has a fixed axle holder and a more stable base • Portable, folding wheel truing stand with auto centering feature • Horizontal and vertical wheel trueness gauges, manual included • Fits 14"-29" wheels, 10mm axle or smaller (can true with tire installed)
$7.12
Precision brake bleeding tools and adaptor kits for Magura brake systems. - 30mL graduations
$9.50
Wheels Manufacturing open bore adapters are used to press sealed cartridge bearings into place. The adapters are machined with one step to correspond to the bearing OD, which fits in to the center of the sealed bearing and an outside diameter to accommodate the bearing's outer diameter. Size: [Bearing inner diameter] x [Bearing outer diameter] Note: If only one dimension is given, that is the outer diameter of the adapter, with no inner diameter step