These spiders are for use on RS8 X-type cranks that require a single chainring set up for the Rohloff hubs. There are two sizes of chainring being 90mm id and 88mm. The 88mm id are for the gates carbon drive system too so please check the chaininrg/type being fitted.
The 104mm BCD allows the fitting of both the gates carbon drive chain ring with the 88mm id fitting on the 54mm chainline plus the standard 90mm id fitting too.
Please note – the 104bcd 54mm spider is available in 2 options either for fitting of a guard or without. The option without only has a single tab cut-out so please ensure you order the correct one.
The 4 arm 104 bcd is machined from 7075 t6 aerospace aluminium for maximum strength
These spiders have been designed to specifically work running a Rohloff hub. If in doubt check the technical information regarding your hub to find out the chainline you require and if in doubt please contact us for help.