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Old 09-21-16, 02:37 AM
  #1047  
Koogar
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Originally Posted by carleton
Veloflex Record Clincher max 145 psi
Vittoria Open Corsa G+ : 145 PSI

and

Conti Grand Prix Supersonic: 170 PSI

In light of stats like the above, I contacted Velocity (the rim maker) and asked them about high pressures in tires. The tech rep said something to the effect of, "The rim can handle any pressure the clincher is rated for."

I ran 160psi in my Tufo Tubular-Clinchers (which is a closed tubular with a bead attached). They are rated for up to 175PSI as well.
1) I wonder if Velocity as a company would want to adopt that position, if they understood that potentially means 175 psi and they're dependent on someone else's specifications. You got a tech's (hopefully informed) response, not an engineering specification.

2) Not everyone is going to use Deep Vs.

3) No surprise tire makers would see a competitive advantage to advertising higher pressures - they're not on the hook if the rim fails. What matters is the lesser of the tire and rim.

4) But most importantly, I worry that not everyone will treat something they read here about tire pressure as specific to a certain track wheel setup. A number of Mavic and Zipp clinchers (including the comete road, super-9, 404, 808...) are rated for 110-125 psi. There is an aviation saying about operating an aircraft outside of its limitations: you may get away with it, but you should understand that you're now an unpaid test pilot.

If you're just trying to construct a specific exception to what I wrote, go ahead and have at it. But if by posting a bunch of tire specs and relating a conversation you mean for people to generalize that it's okay to just blindly pump clinchers up to the tire's max pressure, it's bad advice.
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