The old adage: If it ain’t broke....shocks should be good for 50k. Any wet patches or oil leaks? However, if the rubber is distorted it may have been tightened too much when installed. Shocks should be tightened to a gentle snug fit, not reemed up!

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900