Some racing wheels (like track discs) are used very little and a tubular glued on it may last more than a year.
It would be interesting to properly glue a tubular then measure Crr every two or three months to see how the Crr is affected over a couple of years.
Has any one seen this type of data published?
Sergio
AFM’s Crrdata shows an initial improvement as the surface of the tire is scrubbed of mold release, high spots etc. You should ask him directly but I don’t think the gluing changes Crr over time. Most tires get better the more worn they are as the thinning tread effectively makes the tire slightly more compliant.
Some racing wheels (like track discs) are used very little and a tubular glued on it may last more than a year.
It would be interesting to properly glue a tubular then measure Crr every two or three months to see how the Crr is affected over a couple of years.
Has any one seen this type of data published?
Sergio
I haven’t actually tracked a tire as you suggest but I have remeasured tubulars ~ 2 years after “proper” gluing and the Crr was “the same.” I did however check one that was ~ 5 years old that was higher, removed it and reglued but it was still high. My theory is that the tread rubber might harden with age even though it had thinned out in the center from use casing the Crr to go up but can’t really prove that. Some tires will improve in the first 50 miles or so although in the case of the really fast ones they seem to mostly be fast out of the box.
I am not talking about weeks or even a year, but in tubulars that have been used and glued for more than two years the glue seems to become more brittle with some loss of adhesion in the thinner areas.
I hope AFM chimes in.
Sergio