I just ordered this: Bridgestone Excedra G850 180/55-18 for the rear of my CVO bike. I got 7, 300 miles out of my previous one. The Bridgestone 120-19 on the front still has lots of tread, so I'm wondering if I should replace it anyway, so they will be roughly the same age? I have 39K+ miles on the bike; 37K are my miles. I'm 81 now, and still riding to breakfast (outdoors, at a park) every Friday, due to the virus. We stay apart, without masks, because we have few cases here. If it weren't for these rides to relieve the stress of this Twilight Zone we live in, I'd be going nuts cooped up. At least the gas is cheaper. How do you cope?