I bought a touring bike with disc brakes. Whenever I let go to ride no-handed, it just leans and goes to the left. The discs are on the left side. Do all bikes with discs do that? Also, this bike has replacable dropouts on the back, held in with to bolts each side. I thought maybe they are not even, could that be the cause? Should I just take it to the lbs? (I bought on eBay)I have never ridden a bike where I could not ride no-handed for even a short distance until I got this one. Thanks for any help.