I have a set of Avid mech. 185 disc brakes. I want to use them on my new 2006 5 spot. The rear rotor is just under 1/8" from hitting the seat/chain stays. It fits but it's close. I'm 6'2" and 220 lbs, so the extra size shouldn't be overkill. Should this be a problem or should I just use it. I could go to a 160mm, but I'd need to buy a rotor and 160mm caliper mount.