If you're in Michigan, you've got winter salt corrosion. This led to corrosion of the caps on the bars. It only took 3 months. The tires were flat and took pliers to remove three caps and on the fourth tire I had to replace the stem which cost me more than the caps. I had a set of aluminum Harley-Davidson caps that I lost which prompted me to buy them. I've never had a problem with them!
Car tires Sailun Atrezzo Elite 215/55 R17 94V TL
28 Review
π Enhanced Traction Goodyear Wrangler DuraTrac 265/65R17 All-Season Radial Tire - 112S
28 Review
Goodyear EfficientGrip Performance 2 205/55 R16 94W summer
32 Review
π Hankook 305/45R22 118V Ventus ST RH06 All-Season Tire
19 Review