Hey guys, I have a concern about the rear brakes on my '07 TW200. Last week I aired my tires back up after doing some very light off-road riding, and they needed airing up anyways. I took my bike to a tire shop in the town I go to school in. Had the guy air the back tire up to 20-22 psi, even though for some reason he aired it up to 45 psi originally (WTH??) after I told him 20 psi. Ever since then, my back brake has been squealing whenever I press on it. It has been pretty rainy and wet here, so I don't know if that could be the problem. I have only had the bike for about 3 months, so I might just need to some checking up on the rear brake. Any ideas where to start?