I have 33X12.50 on my dd i love them, will never own a different tire, fine on road little scary in the rain, but awesome offroad. Ive had mine for 5-6 months i live in indianapolis for school right now and drive home to st. louis a little over 300 miles probably once a month and they still have great tread on them. As for the sidewall thing i have a gash in one of my sidewalls from cutting my fenders and they have held up. And as for bias i had thwornbirds, hated them wouldnt balanced ridiculous wear and horrible ride. Only complaint about tsl radials are my 12.50s look skinny i measured them and ther like 11.5 so you might want to go wider when you order them.