Filter By:
- Bar Ends (17)
- BMX (70)
- Bottom Brackets (263)
- Brakes/Levers/Pads (766)
- Cables (231)
- Cassettes/Freewheels (150)
- Chainrings (301)
- Chains (160)
- Show More Categories
- Cranksets (326)
- Derailleurs (169)
- Forks (187)
- Groups (31)
- Handlebar Grips/Tape (425)
- Handlebars (305)
- Headsets (203)
- Pedals (422)
- Saddles (442)
- Seatposts (131)
- Shift/Brake Combinations (73)
- Shifters (144)
- Shocks (39)
- Stems (191)
- Other (2433)
- Show Fewer Categories
- Show More Brands
- Show Fewer Brands
- Show More Sizes
- Show Fewer Sizes
- Show More Model Years
- Show Fewer Model Years
Parts
AJ's Bikes Parts Catalog has all of the parts you need to make your ride run smoothly. From brakes and levers, to handlebars, pedals and forks, we have the right parts for your Mountain Bike, Road Bike, Children's Bike and more!

Cartridges fully replace the functional mechanism of KS dropper posts. Pick the model and length of drop for the post you need to service. These are also called "Oil Pressure Sticks" and "Air Pressure Sticks" In KS Service Documentation.
- Fully replace the functional mechanism of KS dropper posts
- May not work with OEM dropper posts

- LEV has always represented the latest technology but is already a classic among top contending dropper posts.
- With myriad of firsts to its name; first hydraulic dropper to offer zero cable movement, first dropper to win a UCI World XC Eliminator event and first in countless enduros, magazine tests and customer satisfaction polls, LEV IS the first dropper seatpost to outperform itself.

- LEV CI takes rhythm from the trail and injects it straight into your soul.
- 65-175 millimeters of perfect drop are just enough to turn your ride up to eleven.
- A full unidirectional carbon mast routes our Recourse II Ultralight Cable System directly through your frame to our KGSL lightweight remote – a combination saving over 50g compared to our KG ALLOY remote and standard shift cable.
- The result is clean lines for you and your bike. LEV CI’s newly designed cable interface system is easier to setup and service while at the other end, a high compression-molded head connects LEV CI to your saddle.
- Our patented one-way roller clutch bearing and highly evolved seal collar keep LEV CI running smooth and free of side-play for thousands of miles and vertical feet.

- LEV INTEGRA'S internally routed cable significantly cleans up the look of your bike.
- With shifter cables, brake lines and lock out cables clamped and zip tied to your carbon fiber piece of art, mountain bike frames have begun to look like an IT guy's fantasy.
- Clear the clutter while benefiting from legendary LEV technology – now available in 175mm travel.

- Eten-I rounds out the lower end of the KS internally routed dropper post spectrum with a post that is perfect for new riders just getting used to the idea of on-the-fly seat height adjustment or more experienced riders looking for a value-priced solution.
- Eten-I uses the same head and cartridge as the Eten Remote but moves the cable interface to the bottom of the post for compatibility with frames accommodating internally routed cables.

Shimano Altus hydraulic disc brake and lever sets feature an entry-level design that's ideal for beginner riders and riders with smaller hands.
- The brake lever's versatile design matches numerous bike styles
- Braking power is adjusted for entry-level riders
- Pre-bled brakes for easy, quick, and clean installation

The Shimano Altus 3x9 speed front derailleur offers light action and improved clearance for wide tires and mud.
- 50mm chainline
- Chrome-plated cage
- 9-Speed

- Optical gear display
- Adjustable reach
- 2-Finger lever, compatible with linear-pull and mechanical disc brakes
- Includes OT-SIS41 derailleur cable and housing set

Shimano's Dura-Ace Bar-End Shifters are great for tourists, commuters, cyclocrossers, triathletes and time trialists. They provide precise and reliable shifting on double- and triple-chainring drivetrains.

- Model Number: FD-R3000
- Series: SORA
- Top Gear Teeth: 46-52T
- Chain Stay Angle: 61-66
- Chain Line: 43.5
- Models: Braze-on and band clamp available
- Band clamp model includes shims for 31.8/28.6mm seat tubes

Ultegra RX brings Shimano's pioneering chain stabilizing technology to road cycling, delivering smooth and precise shifting over technical terrain. It expands road bike capabilities, inspiring confidence on any surface and drives the evolution of road cycling to include greater elements of adventure. No longer is the road bike narrowly defined. Shimano Ultegra RX broadens the notion of drop bar riding and emboldens cyclist to explore further.
- Chain Stabilizer mechanism adopted from MTB design
- Stabilizer ON/OFF switch
- Compatible with current road dual control lever
- Shadow RD technology
- Direct mount compatible
- Maximum cog size: 34t
- Total capacity: 39t

- For MTB with lateral pull brakes
- Double digit activated lever
- Aluminium lever blade and collar
- Compatible with grip shifting systems

$0.16
Parts for repair and maintenance of DT Swiss hubs.
- DT Swiss Shim Ring: for Star Ratchet Hubs with 26mm OD Driveside Bearings

$0.99
Internally fitting service parts for Hayes hydraulic disc brake master cylinders.
- All HFX-MAG compatible master cylinder internals are designed for the current aluminum piston/2mm push-rod platform (2003 and newer).

$0.99
Sunlite's Cable End Button replaces the worn out piece that goes between your brake cable and the brake lever body. Replacing it along with cables and housing helps add new life to your brakes and shines u the bike, too!
$1.00
Shim spacers can be placed between bearing and compression cover in IS headsets to fine tune the fitment.

$1.00
Looking to get a little extra distance so that your derailleur clears your 40 or 42 tooth cog? Look no further.
- M4 x 24mm screw for that extra little push

$1.20
- Allows quick chain removal without tools
- MissingLink 410HD|~|1sp|~|BMX Heavy Duty chain|~|9.4mm|~|each|~|
- MissingLink 410|~|1sp|~|BMX|~|8.6mm|~|each|~|
- MissingLink II|~|8sp|~|all|~|7.1mm|~|6/card|~|
- MissingLink-9|~|9sp|~|all|~|6.6mm|~|6/card|~|
- MissingLink-10R|~|10sp|~|KMC, Shimano, SRAM|~|5.9mm|~|6/card|~|
- MissingLink-10CR|~|10sp|~|Campagnolo only|~|5.9mm|~|6/card|~|
- MissingLink-11|~|11sp|~|Campy, KMC, Shimano|~|5.5mm|~|6/card|~|

$1.50
KMC 3/16" Master Link Chain Links
- For 3/16" chain, extra wide
- Extra-wide, for non-derailleur bikes: BMX, cruisers, etc
- Perfectly fits on KMC 415H & 415H-NP chains
Page 1 of 243
Next page