I replaced my original Goodyear Eagle RS-As on my Grand Am at 45,000 miles, but they could have lasted longer. The second set of Goodyear Eagle RS-As lasted over 55,000 miles. The third set of RS-As were used and those lasted 30,000 miles. As of last summer I have brand new Goodyear Eagle F1 All-Seasons. The All-Season version of the F1 just came out last summer and were actually cheaper than the RS-As, but I really like this tire, more than the RS-A. Not sure if it is available in the Challenger size.