First ride on my new Challenge Grifo clinchers and they feel great but the tread is peeling off the rear! About 90 minutes in dry conditions, front is fine. Do I need to glue the tread back on w/ tubular cement? Defect? Return them?
I actually got a new pair of Grifo clinchers about a month ago and I've put about 25 or 30 hours on them now. I have had some tread that needed to be re glued, but nothing more than a cm. As they are handmade and the tread is glued onto the carcass, low pressure+hard turns could really stress the tread. I would contact Challenge and see what they say about it. As I said, I've put some serious time on my Grifo's and never had anything more than a cm gap.
There are a number of threads on here about this. Most guys try to reglue with tubular glue. I'm sure if you search through the archives here you'll find a few threads from last season and what guys did to solve this problem.