rear wheel calibration
okay so a while ago me and my friend were poping wheelies and somehow he landed on my rear spokes. the rim is shot and was very difficult to pedal. so i brought the wheel to the mechanic and he upgraded the rim to a stronger one instead of truing the spokes.
i dont know a lot about the physics of the bike gears but i know enough how to fix them. so anyways when i leaving the mecahanic said "make sure u set the high and low gear (or setting, i cant remember) or else you can damage the bike". so im like "what?" and hes like come back with ur bike and $10 and i can set it for you.
is he making this up or is there really a setting i have to do before riding the bike again?
thanks in advance