Tire mounting on these and any deep side rim should be carefully done,tire centering on the rim is important.I gradually inflate the tire in steps,checking tire position as I go.Rolling wheel with tire helps center but with a wide tire its best to use your thumbs to press the tire into the correct position,spinning wheel to check tire alignment. I recall having few problems before the trend to smaller tires,mounting a MICHELIN 50 on a clincher was a snap(but you always spun it to check the tire was seated in the correct position) what ever happened to MICHELIN 50s? BOB FREITAS gray sky this AM in MILL VALLEY,CA
looking forward to mounting tires on a bike I just got ,early AMBROSIO clinchers,single shallow walls