I am somewhat puzzled, because one of the promises of Boost standard was "you can run wider tires". But it does not seem so -- I try to figure out my next (?) setup, 2x10, 29x2.6" tires and I am looking on Alivio FD non-boost version with clearance of 2.3" tires and Boost version with... 2.3" tire clearance.
- I have something like 20-years old bike, non-Boost of course, 3x9, 26x2.35" tires and I have around 1 cm of space between tire and the chain in the closest position to the tire
- my naive guess is chainrings in 2x crankset are placed in "free spaces" between chainrings in 3x crankset, so in the case of this Alivio FD the chain is pushed further outside,
- Boost also adds additional push outside.
So I am totally lost here, I have 26x2.35" tires, I push and push chain outside in order to get more space, and as the result I have room for 2.3"?
Granted, the wheel size plays some role here, looking from BB perspective, the chain in 29" tires will run more parallel.
So maybe I rephrase -- should I be afraid of this 2.3" official spec and take it seriously, or is it just safe play on Shimano part and I can get away with something wider? Like the mentioned 29x2.6"? Or at least 2.4" to see some progress :-).
Background info: the next setup is supposed to be Ritchey Ascent which supports 29x2.6", at least as the frame+fork is considered. Now the question is about rest of the gear.