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Shimano RD-M3020-8 Acera 7/8-Speed Rear Derailleur Black

Shimano

Shimano RD-M3020-8 Acera 7/8-Speed Rear Derailleur Black

Regular price $45.00 Full price
Sale price $45.00
Club price
Regular price $49.99 Full price
SRAM GX Eagle Lunar 12 Speed Derailleur

SRAM

SRAM GX Eagle Lunar 12 Speed Derailleur

Regular price $237.00 Full price
Sale price $237.00
Club price
Regular price $239.00 Full price
29% Off Full Price Clearance
Shimano RD-R8150 Ultegra 12-Speed Derailleur

Shimano

Shimano RD-R8150 Ultegra 12-Speed Derailleur

Regular price $439.99 Full price
Sale price $439.99
Club price
Regular price $625.00 Full price
Shimano Ultegra Di2 RD-R8150 Rear Derailleur 12 Speed

Shimano

Shimano Ultegra Di2 RD-R8150 Rear Derailleur 12 Speed

Regular price $439.99 Full price
Sale price $439.99
Club price
Regular price $499.99 Full price
Shimano High Grade Guide & Tension Pulley Set

Shimano

Shimano High Grade Guide & Tension Pulley Set

Regular price $22.00 Full price
Sale price $22.00
Club price
Regular price $24.99 Full price
Shimano Cues Shadow RD-U6000 Rear Derailleur 10/11-Speed Medium

Shimano

Shimano Cues Shadow RD-U6000 Rear Derailleur 10/11-Speed Medium

Regular price $85.00 Full price
Sale price $85.00
Club price
Regular price $89.99 Full price
Shimano 105 R7000 11 Speed Medium Cage Derailleur

Shimano

Shimano 105 R7000 11 Speed Medium Cage Derailleur

Regular price $105.00 Full price
Sale price $105.00
Club price
Regular price $119.99 Full price
Shimano Standard Guide & Tension Pulley Set

Shimano

Shimano Standard Guide & Tension Pulley Set

Regular price $18.00 Full price
Sale price $18.00
Club price
Regular price $19.99 Full price
Shimano Cues RD-U4000 Shadow 9-Speed Rear Derailleur 46T

Shimano

Shimano Cues RD-U4000 Shadow 9-Speed Rear Derailleur 46T

Regular price $68.00 Full price
Sale price $68.00
Club price
Regular price $71.99 Full price
25% Off Full Price Clearance
Shimano 105 Shadow RD-R7100 Road Rear Derailleur 12-Speed Short

Shimano

Shimano 105 Shadow RD-R7100 Road Rear Derailleur 12-Speed Short

Regular price $89.00 Full price
Sale price $89.00
Club price
Regular price $120.00 Full price
Shimano Ultegra R8000 11 Speed Medium Cage Derailleur

Shimano

Shimano Ultegra R8000 11 Speed Medium Cage Derailleur

Regular price $149.00 Full price
Sale price $149.00
Club price
Regular price $159.99 Full price
BBB RollerBoys Derailleur Pulleys 11T

BBB

BBB RollerBoys Derailleur Pulleys 11T

Regular price $26.00 Full price
Sale price $26.00
Club price
Regular price $29.99 Full price
Shimano Tourney Rear Derailleu 6/7speed RD-TY300

Shimano

Shimano Tourney Rear Derailleu 6/7speed RD-TY300

Regular price $21.00 Full price
Sale price $21.00
Club price
Regular price $23.99 Full price
Shimano Deore RD-M7200-SGS 12 Speed MTB Rear Derailleur

Shimano

Shimano Deore RD-M7200-SGS 12 Speed MTB Rear Derailleur

Regular price $109.00 Full price
Sale price $109.00
Club price
Regular price $119.99 Full price
32% Off Full Price
Shimano RD-R9250 Dura-Ace Di2 12-Speed Rear Derailleur

Shimano

Shimano RD-R9250 Dura-Ace Di2 12-Speed Rear Derailleur

Regular price $679.00 Full price
Sale price $679.00
Club price
Regular price $999.00 Full price

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Meta CNC Model 1 Derailleur Hanger - Suits various Kona, Marin, Norco, Fuji, Orbea, Merida, BMC, Diamondback

Meta CNC

Meta CNC Model 1 Derailleur Hanger - Suits various Kona, Marin, Norco, Fuji, Orbea, Merida, BMC, Diamondback

Regular price $31.00 Full price
Sale price $31.00
Club price
Regular price $35.00 Full price
Aforge Derailleur Hanger - 058 - WMFG 120

Wheels Manufacturing

Aforge Derailleur Hanger - 058 - WMFG 120

Regular price $19.00 Full price
Sale price $19.00
Club price
Regular price $19.99 Full price
MicroShift MEZZO FD-M22 Front Derailleur 3x7/8 Speed 48T-38T-28T

MicroShift

MicroShift MEZZO FD-M22 Front Derailleur 3x7/8 Speed 48T-38T-28T

Regular price $40.00 Full price
Sale price $40.00
Club price
Regular price $45.99 Full price
Meta CNC Model 49 Aviation Alloy Derailleur Hanger Silver

Meta CNC

Meta CNC Model 49 Aviation Alloy Derailleur Hanger Silver

Regular price $40.00 Full price
Sale price $40.00
Club price
Regular price $45.00 Full price
PILO D716 Derailleur Hanger GT

Pilo

PILO D716 Derailleur Hanger GT

Regular price $45.00 Full price
Sale price $45.00
Club price
Regular price $49.99 Full price
MicroShift Acolyte RD-M5185M Medium Cage Rear Derailleur 1x8 Speed Black

MicroShift

MicroShift Acolyte RD-M5185M Medium Cage Rear Derailleur 1x8 Speed Black

Regular price $79.00 Full price
Sale price $79.00
Club price
Regular price $80.95 Full price
QBP RE01A WMFG 96 Derailleur Hanger

Wheels Manufacturing

QBP RE01A WMFG 96 Derailleur Hanger

Regular price $40.00 Full price
Sale price $40.00
Club price
Regular price $45.00 Full price
Shimano Tourney FD-TY606-L Hybrid Front Derailleur 31.8mm/34.9mm

Shimano

Shimano Tourney FD-TY606-L Hybrid Front Derailleur 31.8mm/34.9mm

Regular price $30.00 Full price
Sale price $30.00
Club price
Regular price $35.00 Full price
Wheels Manufacturing Derailleur Hanger #289 Viper

Wheels Manufacturing

Wheels Manufacturing Derailleur Hanger #289 Viper

Regular price $65.00 Full price
Sale price $65.00
Club price
Regular price $69.99 Full price
15% Off Full Price
Shimano XT RD-M8100 12-Speed Rear Derailleur Guide & Tension Pulley Set

Shimano

Shimano XT RD-M8100 12-Speed Rear Derailleur Guide & Tension Pulley Set

Regular price $22.00 Full price
Sale price $22.00
Club price
Regular price $25.99 Full price
MicroShift R9 RD-R42S Short Cage Rear Derailleur 2 x 9/10 Speed Black

MicroShift

MicroShift R9 RD-R42S Short Cage Rear Derailleur 2 x 9/10 Speed Black

Regular price $55.00 Full price
Sale price $55.00
Club price
Regular price $58.00 Full price
Shimano FD-M315 Atlus Front Derailluer 2 x 7/8 Speed Top-Swing For 36T

Shimano

Shimano FD-M315 Atlus Front Derailluer 2 x 7/8 Speed Top-Swing For 36T

Regular price $29.00 Full price
Sale price $29.00
Club price
Regular price $32.99 Full price
Derailleur Hanger DH05

Wheels Manufacturing

Derailleur Hanger DH05

Regular price $65.00 Full price
Sale price $65.00
Club price
Regular price $69.99 Full price
17% Off Full Price
BBB SRAM RollerBoys Pulley Wheel 11T

BBB

BBB SRAM RollerBoys Pulley Wheel 11T

Regular price $29.00 Full price
Sale price $29.00
Club price
Regular price $34.99 Full price
Aforge Derailleur Hanger - 094 - WMFG 065 - Specialized

Wheels Manufacturing

Aforge Derailleur Hanger - 094 - WMFG 065 - Specialized

Regular price $28.00 Full price
Sale price $28.00
Club price
Regular price $29.99 Full price
MicroShift R9 FD-R539 3x9 Speed Front Derailleur 30-36-52T Clamp-on Mount (Shimano Road)

MicroShift

MicroShift R9 FD-R539 3x9 Speed Front Derailleur 30-36-52T Clamp-on Mount (Shimano Road)

Regular price $45.00 Full price
Sale price $45.00
Club price
Regular price $49.99 Full price
Wheels Manufacturing Derailleur Hanger #123

Wheels Manufacturing

Wheels Manufacturing Derailleur Hanger #123

Regular price $67.00 Full price
Sale price $67.00
Club price
Regular price $71.99 Full price
Wheels Manufacturing Derailleur Hanger #41 Bianchi/Diamondback/Raleigh

Wheels Manufacturing

Wheels Manufacturing Derailleur Hanger #41 Bianchi/Diamondback/Raleigh

Regular price $49.00 Full price
Sale price $49.00
Club price
Regular price $49.99 Full price
Shimano RD-7900 Road Rear Derailleur Jockey Wheel Set

Shimano

Shimano RD-7900 Road Rear Derailleur Jockey Wheel Set

Regular price $49.50 Full price
Sale price $49.50
Club price
Regular price $54.95 Full price
Pilo Derailleur Hanger for BH, Cube, Sensa

Pilo

Pilo Derailleur Hanger for BH, Cube, Sensa

Regular price $40.00 Full price
Sale price $40.00
Club price
Regular price $44.99 Full price
Aforge Derailleur Hanger - 043 - WMFG 58 (Pilo D78)

Wheels Manufacturing

Aforge Derailleur Hanger - 043 - WMFG 58 (Pilo D78)

Regular price $28.00 Full price
Sale price $28.00
Club price
Regular price $29.99 Full price
Pilo Derailleur Hanger-D610-Norco

Pilo

Pilo Derailleur Hanger-D610-Norco

Regular price $65.00 Full price
Sale price $65.00
Club price
Regular price $69.99 Full price
15% Off Full Price
Pilo Derailleur Hanger - D592

Pilo

Pilo Derailleur Hanger - D592

Regular price $59.00 Full price
Sale price $59.00
Club price
Regular price $69.99 Full price
Pil D26 Derailleur Hanger - Merida

Pilo

Pil D26 Derailleur Hanger - Merida

Regular price $45.00 Full price
Sale price $45.00
Club price
Regular price $49.99 Full price
MicroShift ADVENT RD-M6195S Short Cage Rear Derailleur 1x9 Speed 38T Black

MicroShift

MicroShift ADVENT RD-M6195S Short Cage Rear Derailleur 1x9 Speed 38T Black

Regular price $112.00 Full price
Sale price $112.00
Club price
Regular price $116.95 Full price
MicroShift Mezzo M30 8 Speed Front Derailleur

MicroShift

MicroShift Mezzo M30 8 Speed Front Derailleur

Regular price $39.00 Full price
Sale price $39.00
Club price
Regular price $43.99 Full price
Shimano CUES RD-U6020-11 11-Speed MTB Rear Derailleur Black

Shimano

Shimano CUES RD-U6020-11 11-Speed MTB Rear Derailleur Black

Regular price $84.00 Full price
Sale price $84.00
Club price
Regular price $88.99 Full price
Wheels Manufacturing Derailleur Hanger #337 Norco

Wheels Manufacturing

Wheels Manufacturing Derailleur Hanger #337 Norco

Regular price $59.00 Full price
Sale price $59.00
Club price
Regular price $64.99 Full price
SRAM Rival 22 11-Speed Short Cage Road Rear Derailleur Max 28T

SRAM

SRAM Rival 22 11-Speed Short Cage Road Rear Derailleur Max 28T

Regular price $99.00 Full price
Sale price $99.00
Club price
Regular price $109.99 Full price
Pilo Derailleur Hanger - D102 - Bulls / Isaac / Jamis / Koga / Norco / Pinarello / Silverback / Vitus

Pilo

Pilo Derailleur Hanger - D102 - Bulls / Isaac / Jamis / Koga / Norco / Pinarello / Silverback / Vitus

Regular price $36.00 Full price
Sale price $36.00
Club price
Regular price $39.99 Full price
Pilo Derailleur Hanger - D578

Pilo

Pilo Derailleur Hanger - D578

Regular price $59.00 Full price
Sale price $59.00
Club price
Regular price $59.99 Full price
L-TWOO R7 Series Road Rear Derailleur 2x10 Speed 11-32T Shimano Road Compatible

LTWoo

L-TWOO R7 Series Road Rear Derailleur 2x10 Speed 11-32T Shimano Road Compatible

Regular price $70.00 Full price
Sale price $70.00
Club price
Regular price $70.00 Full price
52% Off Full Price Clearance
MicroShift XCD 11 RD-M865M Clutched Medium Cage Rear Derailleur 1x11 Speed

MicroShift

MicroShift XCD 11 RD-M865M Clutched Medium Cage Rear Derailleur 1x11 Speed

Regular price $69.00 Full price
Sale price $69.00
Club price
Regular price $144.95 Full price
18% Off Full Price
Pilo Derailleur Hanger - D671 - For Norco

Pilo

Pilo Derailleur Hanger - D671 - For Norco

Regular price $65.00 Full price
Sale price $65.00
Club price
Regular price $79.99 Full price

Find Your Size

Step 1: Measure your height

  • Take off your shoes
  • Stand with your back straight against a wall
  • Balance a book on your head to mark your height on the wall
  • Measure your height by the distance from the floor to the mark
cm

Find Your Size

Step 2: Adjust your inseam

  • Based on your height, we’ve calculated a starting point.
  • You can measure your inseam by tucking a book between your legs so there is pressure but it isn’t uncomfortable.
  • Inseam typically falls with 5cm of the average.
cm

Find Your Size

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Recommended sizes will now be highlighted on the page.

Things to Consider When Shopping for Derailleurs

When shopping for derailleurs, it helps to know what type of riding you do and what drivetrain you're working with. Derailleurs are the mechanical components responsible for moving your chain across gears, and choosing the right one depends on a few key factors. First, consider whether you need a front or rear derailleur, as both serve different functions within your drivetrain. Next, think about compatibility with your existing groupset and the number of speeds your bike runs, since derailleurs are designed to work within specific systems. Riders shopping for MTB derailleurs will have different requirements to those on road bikes, so knowing your discipline helps narrow things down quickly. If you're simply maintaining your current setup, jockey wheels are a straightforward way to restore smooth shifting without replacing the full derailleur. Explore the different types of derailleurs below to find the right fit for your riding needs.

Commonly Asked Questions about Derailleurs

Expert Advice

Handlebars Buying Guide
Buying Guides

Handlebars Buying Guide

Handlebar design and dimensions are integral to how your bike handles and ultimately, how well it fits you. Bikes will generally come with handlebars of the appropriate size and shape, however, an upgrade can give you that extra performance edge. Road Bike Handlebars The most important consideration when buying road bike handlebars is width with the goal being to try and match the width of the bars to your shoulders to ensure a comfortable riding position. Secondly, you'll need to decide on what shape you require. The curve in road bike handlebars is referred to as 'drop' with a larger drop allowing for a more aggressive and aerodynamic riding position, however if you're not confident you'll be able to stay down in your drops for long periods of time then a more compact design might be the best for you. Finally, you should consider what material you'll require. Road bike bars are available in both carbon and aluminium and the choice largely depends on how much weight you want to save vs. how deep your pockets are. Shop Road Handlebars Mountain Bike Handlebars As is the case with road bikes, mountain bike handlebars come in a variety of widths to suit different rider sizes and styles. Wider bars provide greater control in corners, but can be a handful around obstacles in a tight and twisty trail. If you're into downhill riding then you'll want extra strong bars to put up with the rough ground and heavily landings you'll be encountering on the trails, whereas if cross-country riding is more your style then you will be more concerned with weight rather than strength. It is also important to ensure that you get the correct diameter bar to fit your stem with the most common size being 31.8mm. The final consideration to make is rise, which refers to how much higher the ends of the bars sit in relation to the centre clamp. A lower rise gives a more aggressive riding position however won't be as comfortable over longer rides as bars with a larger rise. Shop MTB Handlebars

Oct 8, 2025
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Bike Stems Buying Guide
Buying Guides

Bike Stems Buying Guide

The right size bike stem will greatly improve your riding efficiency and comfort. They are available in varying lengths to accommodate riders of different heights. Short stems provide a more upright riding position. While a longer stem will produce a more 'stretched out' position. Stems are also available in a variety of angles which allows you to effectively raise or lower your handlebars to achieve the optimal riding position. See All Bike Stems

Oct 8, 2025
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Easy Bike Maintenance Velo Academy
Cycling Advice

Easy Bike Maintenance Velo Academy

No matter how often you ride, it's well worth learning a few things about how to maintain and adjust your bike. 99 Bikes and Velo Academy have put together a series of videos to help you learn a few basic procedures to help you ride more comfortably, and possibly also get your out of a sticky situation (like failing brakes!) Adjust Seat and Handlebars In this video you'll learn how to adjust your bike seat and handlebars to make riding as comfortable as possible. For this, you'll need a torque wrench. Adjust Brakes In this one, you'll find out what to do if you notice your brakes aren't sitting quite right. You'll need an allen key or multi-tool. Clean and Lubricate a Chain In this video, you'll learn how to clean and re-lubricate your chain. You'll be needing citrus degreaser, chain cleaner, chain lubricant, water and a clean rag. Fix a Flat Tyre Finally, this video will show you how to change a flat tyre. For this, you'll need tyre levers, a new inner tubeC and a pump. See All Tools and Maintenance

Jul 3, 2025
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