I'm having a problem with a set of v-brakes I just installed on my bike. The bolts which hold them on the brake bosses are bottoming on the caliper before bottoming on the boss. If the bosses were even 1mm longer, it wouldn't be an issue. So now all four brake arms have more friction than they should, which makes adjusting spring tension between pairs difficult.
So far the two solutions I've thought of are making 4 thing spacers out of old brake bosses to keep the bolt from hitting the brake, or to use lock tight and not tighten the bolts down much. I'm not a fan of the latter.
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Thread: V-brake installation problem