Rear Derailleurs
Rear derailleurs guide the chain between rear sprockets. When replacing one, consider shifter, cassette range and frame attachment together. This collection may include spares alongside complete derailleurs for different systems; distinguish full units from cages or service parts.
Rear Derailleurs collection
Shimano Tourney Rd-Ty300D 6-7S Rear Derailleur
Shimano Sora RD-R3000 GS Rear Derailleur 9 Speed Long Leg ERDR3000GS
Shimano Altus Rd-M310 7-8 Gear Compatible Rear Derailleur
Shimano 105 RD-R7000SS Rear Derailleur Leg Y3F306000
Shimano Cues RD-U6050 Rear Derailleur 10 Speed Compatible Di2 IRDU6050GS
Shimano Deore RD-M6100 12 Gear Compatible Bicycle Rear Derailleur Long Leg
Shimano Cues RD-U6070 Rear Derailleur 10 Speed Compatible Di2 IRDU6070GS
Everything About Cycling Clothing
Browse the Collection
Shimano Deore XT RD-M8120 12 Speed Rear Derailleur Long Leg Shadow+
Shimano Transfer Roller Set RD-M9000-M9050 Y5PV98160
Shimano Ultegra Di2 RD-R8150 12 Speed Compatible Bicycle Rear Derailleur Direct Mount
Shimano Ultegra RD-6800 Reel Set Y5YC98140
Shimano Dura-Ace Di2 RD-R9250 Rear Derailleur IRDR9250F 23GK100A047
Shimano 105 Di2 Rear Derailleur RD-R7150 12 Speed IRDR7150E
Shimano Saint RD-M820 Short Chain Rear Derailleur Shadow+ 10 Speed IRDM820SS1
Shimano Deore XT Di2 Rear Derailleur RD-M8150-SGS 12S IRDM815012SGS
Shimano Transfer Roller Set RD-M7100 Y3FY98010
Shimano Tourney RDTY300 Rear Derailleur 6/7s Road Type
Shimano GRX RD-RX400 GS Rear Derailleur 10 Speed Shadow
Shimano Deore RD-M6200 SGS Arka Aktarıcı 12S Uzun Bacak ERDM6200SGS
Shimano Deore XT RD-M8100-SGS Rear Derailleur 12 Speed Long Leg
Shimano Tiagra Long Leg Rear Derailleur 10 Speed RD-4700-GS
Shimano Cues RD-U4000 SGS 9 Rear Derailleur ERDU4000GS
Match the rear derailleur to the system
Identify exact shifter and derailleur models. Cassette range must meet the derailleur's sprocket limits and total capacity. Cage length helps selection but does not explain every aspect of compatibility. Assess mechanical and electronic connection requirements separately; hanger condition affects operation too. Pay particular attention to service-part codes: a cage alone does not have the same contents as a complete derailleur.
- Check gear count and system family together.
- Record cassette range and chainring arrangement.
- Verify frame mounting and package contents.
Does a long cage suit every cassette?
No. Follow capacity and sprocket limits. A long cage does not mean unlimited range.
Are shifting problems always caused by the derailleur?
Cables, housing, hanger alignment or chain wear may contribute. Assess system condition before ordering to identify appropriate maintenance.
