For reasons i cant explain i like to run a fat tyre on the rear, the problem is the tyre fouls the brake arms, on my last bike i filed the 990 arms to get clearance but on my new ride with a proper mag rear brake i cant do this i have tried adjusting the blocks to pull the arms off the tyre, tried putting extra link in chain but makes it too long, the tyres not mega fat its a KHE mac 2.0.
The only thing i can think of is a half link chain to get more acurate length.
Any suggestions other than a thinner tyre welcome.
Cheers