Best Aluminum Alloy Rear Bike Derailleurs in 2026

Model: RD-TY300 rear derailleur, compatible with 6 and 7-speed SIS INDEX variable speed transmission systems compatible with 11T /14T high speed gear

Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding Smooth shifting,

Wide application: Rear derailleur is easy to use and maintain.Suitable for MTB,mountain bikes, road bikes, folding bicycles and so on.

Anodised CNC machined bicycle jockey wheel with fully sealed bearing for center bolt derailleurs

Specification:SHIMANO & SRAM

Fits for almost all mountain bike of 11T

【Model】 Shimano Tourney (SIS) RD-TZ31-GS 6/7 speed，medium-cage , direct mount.No retail packaging. Items as shown

【Specifications】 Total capacity(aka chain capacity) 34T, Largest sprocket 28T , Smallest sprocket 14T, Front chainwheel tooth difference 20T.

【Compatibility】 Compatible with 6 and 7-speed SIS Index Shifting drivetrains, for mountain bike.

Derailleur Hanger for Specialized Bikes

Derailleur Hanger for Stumpjumper

Material: Aluminum Alloy

MODEL:RD-TY300 Rear Derailleur,Suitable for 6/7/8 speed.

PERFORMANCE:Forged with high hardness aluminum alloy.The hollow weight-reduction design is adopted,and the speed change is more stable.

PRECISE ADJUSTMENT: High-hardness aluminum alloy body adjustment, adjustment is more precise. It can be adjusted slightly in multiple places to ensure accurate speed change performance.

*Model：RD-TY21B rear derailleur compatible with 6/7 speed mountain bikes.

*Note:The bike rear derailleur is hub bolt mount (hanger mount),not direct mount .Please check the mount type of the original part before purchasing.

*Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.

Model: RD-TZ31-A; Bike rear derailleur, compatible with 6/7 speed mountain bikes, commuter bike, tricycle, folding bike etc.

Note: The bike rear derailleur is direct mount, not hub bolt mount. Please choose right mount way before you purchase.

Stability: Made of high quality durable aluminum alloy material and come with excellent shifting performance ensure your safe and stable while riding.

【MODEL】Bicycle rear derailleur RD-TY21B, suitable for 6-speed and 7-speed SIS index variable speed drives. Please pay attention to the speed when buying.

【Hook mounted】Before purchasing, please confirm whether the rear derailleur of your bicycle is directly installed or hook mounted. This model is a Hook mounted method.

【High-quality material】This bicycle rear derailleur is made of high-quality steel, sturdy and durable, not easily deformed and not easily damaged.

【PACKAGE】2 x Bicycle Derailleur Hanger Replacement.

【FUNCTION】Play to protect the transmission after dialing role.

【APPLICATION】Universal type fit for most of bike in case of emergency.

Material: This bike derailleur pulley adopts quality aluminum alloy and ceramic material. It uses anti-rust and anti-corrosion materials to ensure long-term use, and resistant anodized machined bicycle jockey wheel ensure normal working.

Performance: this bike guide roller pulley not only reduces drag and improves cycle efficiency but is also very durable.

Additional accessories: The bicycle rear derailleur use ceramic bearings, for center bolt derailleurs which protect the bike. These pulleys run on smooth ball bearings.

Shimano RD-TZ31 6/7 Speed Rear Derailleur Direct Mount For Mountain Bike

This is Direct Mount type, NOT hub bolt mount type，Material: High quality plastic and alloy

For 6/7 grade freewheel, SIS index shift, fit for mountain bike/road bike

Rear derailleur: 7/8/9 speed, direct mount

Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.

Note:The bike rear derailleur is direct mount,not hub bolt mount.

Model: RD-TY21B rear derailleur compatible with 6/7 speed mountain bikes.

Note:The rear derailleur is direct mount,not hub bolt mount .Please check the mount type of the original part before ordering.

Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.

MODEL: RD-TZ31-A bike rear derailleur, Compatible with GS 6 / 7 speed SIS Index Shifting drivetrains.

STABILITY: Durable aluminum alloy and plastic alloy material, Providing excellent shifting performance ensure safe and stable.

PARM: Total capacity 34T, Largest sprocket 28T, Smallest sprocket 14T, Front chain wheel tooth difference 20T.

PLEASE NOTE: Derailleur Hanger 5 looks similar but is smaller and will NOT Fit. Derailleur Hanger 49 looks similar but will NOT fit

INCLUDES: M8 Chainring Bolt Mounting Hardware

MATERIAL: Aluminum Alloy

#NAME?

PREMIUM ALUMINUM ALLOY: This bike derailleur pulley adopts quality aluminum alloy and ceramic material to ensure durable to use. It also can reduce drag force which can improve cycling efficiency.

ADDITIONAL ACCESSORY:It uses ceramic beads to protect the center bolt derailleur of the bicycle, and these pulleys run on smooth ball bearings.

【Rigorous Design】:Double (top or bottom) pull, 3-speed design, can matching 6/7/8/9/10/11 speed rear derailleur (★Don't matching 12 speed rear derailleur).

【Dimension】:Clip ring supports 31.8/34.9mm diameter tube. Crankset: 3 gears, compatible crankset 22-42T. universal for most mountain bike.

【Easy To Use】:Attach the front derailleur to the bike frame, temporarily tighten the toggle bolts, and then adjust the flat part of the chain guide outer guide plate to be parallel to the flat surface of the maximum crankset. Make adjustments, make it have 1-3mm space between the outer guide of the chain guide and the maximum crankset. After the adjustment is complete, tighten the ring bolts.

[Bike Rear Derailleur Hanger]: Well protecting your bike from being damaged in case of falling down with this derailleur hanger, it will absorb the impact to reduce the damage

[Durable Aluminium Alloy]: Made of high quality aluminium alloy, the rear derailleur hanger has good texture, smooth surface, practical durable for longer use

[Easy to Install]: Comes with screws, the derailleur hanger is easy to install and remove; Before installing a derailleur hanger, the rear dropouts need to be check for alignment. If the rear dropouts are not aligned and the new derailleur hanger is installed, it will break or bend

Bicycle Rear Derailleur Hanger fit for a wide-range bike style cassette., apply mountain freewheel 11-40, 11-42, 11-46, 40T, 42T, 46T Road flywheel.

Aluminum alloy material, CNC workmanship, solid and firm, very durable.

Easy to Install

Oil slick color pattern: looks super cool when light reflects from them

Come with adaptors: meets shaft screw sizes of 4/5/6mm

Made of high strength aluminum material: durability is much better than plastic ones

QUALITY MATERIAL: This bike rear guide wheel adopt quality aluminum alloy which is durable to use.

CERAMIC MATERIAL: Ceramic material can reduce drag force which can improve cycling efficiency.

FASTER SPEED: Positive and negative tooth guide wheel, no strange voice and faster speed.

[QUALITY ALUMINUM ALLOY]: The bike rear derailleur is made of quality aluminum alloy with CNC machining, sturdy and firm, durable and corrosion-resistant.

[LENGTHEN THE REAR DIAL CHAIN]: The bike rear derailleur is used to lengthen the rear dial chain, and apply to mountain flywheel 0T/ 42T/ 46T/ 50T highway flywheel.

[SPEED CHANGE SMOOTHLY]: The bike rear derailleur makes the flywheel speed change more smoothly.

Premium Material: This pulley is made of CNC aluminum alloy, light weight, durable and long life.

Perfect for use: This pulley works with smooth ball bearings. It is an accessory required for bicycles. Fits almost any 11T or 13T mountain bike. Enjoy cycling.

Great workmanship: Bicycle guide wheel pulleys are anti-corrosion and corrosion resistant anodized. Therefore, it has good performance and can be used for a long time.

?LIGHTWEIGHT AND DURABLE?Bike jockey wheel pulley is made of cnc aluminum alloy, which is lightweight and durable.

?FOR MOST OF THE REAR DERAILLEUR?Bike jockey wheel apply for most of the rear derailleur on the market, support 7/8/9/10 speed.

?GREAT PERFORMANCE?Rear derailleur pulley is anti rust and corrosion resistant anodized. These pulleys run on smooth ball bearings.

【Bike Guide Roller】Diameter: 2 inch / 50cm; Teeth: 12T. Stronger compatibility with flexible rotation!

【Lightweight & Durable】Made of quality aluminum alloy with fully sealed bearing for center bolt derailleurs, Durable to use and longer life

【Ceramic Guide Pulley】Ceramic material can reduce drag force which can improve cycling efficiency. Ceramics bearing, super lubricating, noiseless!

【High Quality】- Made of aluminum alloy material, with upgraded CNC process. Our Bike Jockey Wheel Pulley is lightweight but durable, anti-corrosion and anti-rust.

【Ceramic Bearing Pulley】- New upgrade design, with ceramic bearing, can reduce the resistance during cycling, which ensures fast and sensitive working. Improve riding efficiency.

【Package Included】- Come with 2PCS Bicycle Rear Derailleur Pulleys, 2PCS Bike Rear Derailleur Bolts, and 2PCS 4mm Adapters, 2PCS 5mm Adapters. Can be converted into 4/5mm bearings after installation.

[ALUMINUM ALLOY & CERAMIC]: Adopting aluminum alloy and ceramic material, this product is lightweight and durable. Offers you a better cycling experience.

[SUITABLE FOR]: This Ceramic Bearings is a necessary accessory for your bicycle, which can be applied for most mountain bike. Supporting for various speed shifting.

[COMPATIBILITY]: This product is compatible for most of rear derailleur on the market and adjust to 7/8/9/10 speed.

VARIOUS SPEED: Our jockey wheel fits for almost all mountain bike of 11T and 13T, suiatable for use 4 / 5 / 6 mm guide wheel screws.

SAFETY RELAX: Our 11 tooth pulley wheel is sensitive and safe, let your cycling exprience more safety and relax.

HIGH QUALITY MATERIAL: Adopting aluminum alloy and ceramic material, lightweight and durable.

【Aluminum Alloy】Bike Hooks, Made of high quality aluminium alloy, durable and longer use

【Smooth Texture】Gear Hanger, Good texture, smooth surface, practical

【Easy To Use】Bicycle Derailleur With screw, easy to install and remove

1;100% Compatible with Shimano ,SRAM 9 Speed rear derailleur

2; *Note:The rear derailleur is direct mount,(not hub bolt mount) .（NOT Hanger Mount） Please check the mount type of the original part before ordering.

3; Long Cage rear derailleur Compatible with 11-36t bicycle Cassette