Inkesky RD-TZ31-GS 6/7 Speed Rear Derailleur with Direct Mount, Medium Cage, for Mountain Bike
- 【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.
- 【Incompatibility】 1) Not compatible with hub bolt mount (bracket mount) frame 2)If the total capacity of your bike exceeds 34T, this RD-TZ31 is not compatible with your bike, please konw before buying. Please see below for a detailed description of how to calculate total capicity.
- 【Tools Required】 5mm allen wrench
Total capacity(Chain capacity)
Largest sprocket: 28T
Smallest sprocket: 14T
Front chainweel tooth difference: 20T
Calculation of capacity
Total capacity = Rear(biggest cog teeth – smallest cog teeth) + Front(biggest chainring teeth – smallest chainring teeth).
For example: The total capacity of your bike is 38T, which is more than 34T, then they are not compatible. If it is 32T(your bike), then they are compatible.