Tour has done another clincher vs. tubular test and the GP4000RS clincher wins (of course... test are done @ continental)
and again, no latex innertubes used
Bumping an old thread, for a small correction. Not getting into another Tour testing debate, just some facts:
- When talking rolling resistance and weight, Continental did not win, Veloflex did; the Record clincher is hailed as the lightest and best rolling tire ever tested. 2nd place in rolling resistance is the Continental GP Supersonic. The 4000 RS is in third. It did win the overall test (better puncture resistance and grip in the wet).
- The best rolling tubular tested was the Vittoria Crono EVO CS 22.
- Tour does test at the Continental facility, so it is logical that the Conti tires are optimized for that. Tour does however use there own measuring equipment.
- Tour acknowledges the effect of the inner tube. They tested with a 75g butyl tube (as opposed to a heavier tube in previous tests; results not directly backwards comparable) and state that with a latex tube, the rolling resistance of the clinchers, as tested, would drop by 2-3Watts.
- There is no measured
difference in puncture resistance between the RS and the R (previous tests), as both tires pass the 180 second cut-off point in Tours' test (sharpened screwdriver pressed on the inflated tire with 35kg force, mechanical rocking motion applied)
- According Tour and Continental, the RS has a new compound, so it's not a R with a thinner tread, but it does have only half the tread depth. Tour tested the life of the RS at ~3000km for the rear tire.