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@The_Batman
So I've just built up a new bike, most components are new, a couple of second hand bits, but all of the drive chain is straight out of the box. And it's noisy and gritty as hell!
I have a Stronglight 48T Comp 144 at the front, a generic 18T sprocket at the back and a Sram P1 chain. All of them are 1/2 by 1/8. The bottom bracket is a brand new Miche Primato Track 107mm and the rear wheel is new (System Ex hub built on to a H Son Plus rim).
So I checked the chainline and it's a couple of mm out. I assume that's the problem but I wanted to ask why it would be out in the first place. My rear spacing is a touch under 42mm. And at the front it is just over 44mm.
The crankset recommended using a 107mm BB for a 42mm chainline (planetx.co.uk/i/q/CSSTTR2K/stÂronglight-track-2000-crankset) and I am using a Miche 107mm. So is it because I am crossing brands? Or is it common to run into this kind of issue? Finally how should I resolve it? The cranks are fully tightened on to the BB, which is itself fully tightened. Would you recommend using shims at the back, getting a different BB or something else?
Thanks.