The smaller models don't have much in the way of internal organisation

Afterburner DB-TX-9150

Valve is made from medical grade silicone

They will not work with a regular 24mm spindle

Dash Sport

Shimano Replacement Rear Derailleur Clutch Kit - Suit RD-M675 Dropship The smaller models don't haveShimano Shadow+ rear derailleurs use a clutch system to stabilise the cage that supports your chain in order to prevent your chain from slapping around and causing damage to your frame, and from dropping off your chainring. Because these units are friction devices, they need maintenance to run smoothly and not 'catch'. Replacement stabiliser units are an easy fix and combined with some thorough cleaning of the plate axle and the re application of