Stone Chainring Adapter Spider for Shimano To 104BCD Direct Mount Converter 3mm 6mm Offset M6100 M7100 M7120 M8100 M8120 M9100
STONE`s new design
- This chianring spider is designed for Shimano`s new direct mount crank. The conversion specification is BCD104. It can be installed on the front side and back side to achieve different offsets.
- At the same time, it can be transferred to a conventional BCD104 specification single chainirng, reducing the upgrade cost and increasing the versatility.
- Different models of Shimano have different crank axle lengths. For example, M7100 and M7120 have different axle lengths. Customers can use this spider to install M7120 to obtain a 6mm offset to achieve the same chainline as M7100.
- To solve the problem of the riders installing a big teeth against the frame, can install to the outside (negative offset).
Material: High strength Aluminum 7075-T651, supplied by USA company Aleris who is supplier to aircraft make Airbus, Boeing and Bombardier.
Material Hardness: HB150
Color: black,silver
Fit Crank:M6100,M6120,M6130,M7100,M7120,M7130,M8100,M8120,M8130,M9100,M9120,M9130
Hub should be 148 boost.
Surface treatment: Anodize, high speed CNC
Package content:
1*chainring with 1*washer