Best Steel Bike Derailleurs in 2026

Material: forged aluminum, [spring] titanium

Capacity: 42t

Cassette Range: 12-52t

Chain Wrap Capacity: 43teeth, Derailleur Action: Top-Normal (Traditional)

Derailleur Color: black, Drivetrain Spacing: Shimano/SRAM 8, Largest Cog: 34teeth

Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 326g

Shimano Acera M360 7

8-Speed Rear Derailleur with SmartCage, Black

Shimano Acera Rear derailleur compatible with all Shimano 7 & 8 Speed shifters. Advanced light action design.

Direct frame fit. SIS Rear index shifting.

Megapulley oversize jockey wheel. Smartcage pulley plate.

Rear Derailleur (3x8-speed)

8-speed drive train

Durable light action shifting peformance for stress free riding. Double Servo-panta Mechanism

Includes the SRAM GX Eagle AXS rear derailleur with battery, Eagle controller with clamp, charger with cord, and chain gap tool

The GX Eagle AXS rear derailleur shifts on command, whether under climbing load or sprinting to the stage finish, and is smart enough to protect itself thanks to its incredibly resilient Overload Clutch

Rear derailleur is compatible with 10-50t and 10-52t cassettes

Stabilizer switch to reduce chain slap

Low profile Shadow design

10-Speed Shadow Plus MTB rear derailleur

Shimano fd-m310 Altus 8-Speed front derailleur, conventional swing, 42-48t, 66-69 degree

COMPATIBILITY & SIMPLE TO USE: Fit seat post size: 28.6mm. compatible with Shimano, Sram, FSA, Campagnolo type braze on front derailleur. Simply clamp the adapter on the seat tube.

STRONG: The adapter is made of high quality aluminum alloy AL6061 T6. It is also hardened by heat treatment.

LIGHT: The bike adapter weights only 40g or 1.4 oz. I will not add a lot weight to your light road bikes or MTB.

Material: aluminum

Capacity: [medium] 39T, [long] 47T

Cassette Range: [medium] 42T (2x11), 46T (1x11), [long] 40T (3x11), 42T (2x11), 46T (1x11)

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

Extended B-Knuckle for improved clearance for 28t cassettes

Exact Actuation shifting provides fast, accurate shifts

Outside Carbon Cage designed for precise chain management and new reduced profile inner cage

Item Package Weight: 0.21 kg

Item Package Length: 9.2 cm

Item Package width: 12.0 cm

Pull Type: bottom

Mount Type: braze-on, clamp (31.8, 34.9mm)

Gearing: 44 - 53t top gear

MODEL:RD-TZ31-A bike rear derailleur.This is a mountain bike derailleur, which is basically suitable for mountain bike, and can adjust the speed of 6 / 7.

Easy to Install: Adopt ergonomic design, with simple design, easy to install and remove, convenient to use.

Premium Quality:Accurate gears provide light and stable shift performance,and making riding easy.

【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.

Precise chain movement changes gears smoothly

Direct Mount

Light shift effort

Cage Lengths: GS-medium<br/>Capacity: 37T<br/>Derailleur Action: Top-Normal (Traditional)<br/>Derailleur Color: Silver<br/>Derailleur Color: silver/black<br/>Drivetrain Spacing: Shimano/SRAM 9<br/>Largest Cog: 34teeth<br/>Min/Max: 11/34T<br/>Shifter/Rear Derailleur : SRAM 1:1<br/>Speeds: 8/9sp<br/>Speeds: 9sp<br/>Weight: 290g<br/>Weight: 320g

Mountain double or triple

Dual Pull Design: Compatible with top or bottom routing

Shimano Reference Number: FD-M310

Sram X3 is a great beginners or light adventurers rear derailleur

The X3 rear derailleur sets the standard for opening price point shifting performance

Outer cage made of steel

9 speed compatible Sora triple front derailleur delivers great value to sport level road riders

Wide pivot link increases rigidity while reducing flex for improved shifting response

Aluminium links and band to save weight and increase rigidity

MODEL: SHIMANO TOURNEY RD-TY200 bike rear derailleur, Compatible with 6 and 7-speed SIS Index Shifting drivetrains.

IMPORTANT: The Shimano direct mount rear derailleur for mountain bike, not hub bolt mount (hanger mount).

EXCELLENT PERFORMANCE: Accurate gears provide light and stable shift performance, and making riding easy and comfortable.

TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cage

TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cage

Chain Wrap Capacity: 43

FD-M310 Altus 8-speed front derailleur

Top swing

42-48T

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.

【PACKAGE】2 x Bicycle Frame Derailleur Gear Tail Hook Replacement.

【FUNCTION】Play a role that protects the transmission after dialing role.

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

Index Rear Derailleur Hanger

Compatible with most Shimano and SRAM non-bolt-on rear derailleur

Includes Mounting Screw Bolt and Nut

*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.