20-06-2022, 01:46 PM
I ran my Trials Chummy for 20 years on a 1 1/8 SU. I also changed the 1 1/8 on my hillclimb Ulster for a 1 1/4 for last season but it was never as good as it'd been before. Changed back for this year and it's back to it's best. At the level of tune the OP is reporting I'm afraid he might be disappointed with the 1 1/4.
Steve
Steve