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Challenge Grifo Tubular Tire for Cyclocross
The Challenge Grifo tubular tire is a premium hand-made tubular cyclocross racing tire. I tested both the 34C and 32C versions.
I had three immediate tire semi-failures on the front wheel (defective or badly made tires).
Yet a 700 X 32C size worked great (no bulge problems after ~300 miles) and I have gotten a lot of miles on it. Grip with the 32C version is excellent.
See Challenge Grifo 32 tubular tire @AMAZON pricing at Amazon.
Technical features
Oddly, the picture on the Challenge site shows 300 TPI, but the tires I bought are actually 260 TPI, which is also what the specifications say.
Use: Cyclocross Size: 28" Width: 32mm Weight: 415 gr (nominal) TPI: 260 BAR: 2-6 PSI: 28-87 Bead Casing: Super Poly Color: Black-Brown
Weight
The bike industry cheats on weight. Challenge is no exception, but the weights are quite close, far better than the 10% or more one might find with Veloflex.
I weighed two tires as follows:
423g = +1.9%
427g = +2.8%
Ride quality
Excellent on the Moots Psychlo X RSL.
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