I love these tires. With 90 pounds of tire pressure they roll easy. 90 pounds is easy to obtain using a hand pump or an air compressor. They are easy to install unlike other high pressure tires. The other review said the treads came off on his quickly but mine have been on for months with no problems at all. The description says it is 1 3/8" but the actual tread is only 1". I highly recommend these tires to everyone.