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@Numeryk
I am planning on changing the cog on my Fuji, as the standard 48x15 ratio is a bit high.
Is there a big difference between having 18 and 19 at the back?
I realize the number of skid patches is different and 19T will most likely need getting a new chain.
I also thought briefly about 17 at the back but the difference between 17 and 15 may be too small.
My current fixed is 44x18 and this is too much spinning.
I also thought about going for different chainring, but the FSA crappy cranks from the FUji Track come with sort of dished one and a swithc will probably screw up my chainline.
So what is the advice?