I changed tires in the 60s and 70s with a pair of 8" irons, no problem. When I resumed changing tires in 2002, I got my butt kicked by a pair of Bridgetone Spitfires using the 8" tools. I got the tires on but fought back later , and won easily, with an extra long tool, a 16? incher, when the Spitfires were replaced.