Rail (625Wh) BOSCH SPIDER

[idunne]

HI...am thinking of fitting a bosch spider to save money on chainrings but confused a bit whats the diffferance between none boost spider and a boost spider.......trek rail 5 2022 cx motor

 

[Paulquattro]

Hi
Different offsets
It relates to the wheel hub spacing so the chainline stays correct
Boost wheel set = Boost spider

 

[idunne]

Hi
Different offsets
It relates to the wheel hub spacing so the chainline stays correct
Boost wheel set = Boost spider

thanks mate

 

[JGH]

Does anyone know what is the chainline for Bosch Spider Gen4 non-boost and boost versions?

According to my Cube's frame specs with Bosch CX Gen4 (2020?) and rear axle measurements I must use non-boost version, but when I tried it - it must sit deeper for the lockring to lock it (otherwise not enough thread on lockring). The default chainring is metal, thin and flat where the aluminum spider has thicker part which sits on the axle (likely because it is aluminium and needs more grip).

Problem is I can not find anywhere I live Bosch Spider Gen4 Boost version to buy, so I need to look to third party manufacturers. The one I could buy is by Miche (E-Bike Spider Bosch MTB Boost Gen. 4 104 mm) where Miche indicates that standard is 48mm chainline and boost is 52mm chainline. But I donot know how it compares to Bosch chainlines.