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vittoria open cx corsa question?(7 posts)

vittoria open cx corsa question?Bobha8
Oct 14, 2001 2:43 AM
I have a set coming on a bike I just bought, the max pressure says 180 for these clinchers, all other I have ever used have been 110 or 120, I wiegh 190 what psi do I run these at?

thanx,
Bob
re: vittoria open cx corsa question?jacques
Oct 14, 2001 11:52 AM
The maximum pressure stated on the tire sidewall has nothing to do with riding. It's a legal disclaimer saying, in your case, "Vittoria is not liable for damage or injury if these tires are inflated beyond 180 psi."

I use 90-120 psi as my range. I'm at the lower end if I plan to ride on rougher pavement, the higher end if I'm going to time-trial. I weigh 145 lb., so you should perhaps add 10 psi to those numbers.
180? Gotta be a mistake!DMoore
Oct 14, 2001 11:53 AM
My Corsa CX tires, in 700 x 23, say "7-8 bar." That's a max. of about 120 psi. That's the pressure I ran in them when I was around 190#. I suspect that 180 psi would blow the tire right off the rim!
Not according to Vittoriamickey-mac
Oct 14, 2001 12:18 PM
The Vittoria site shows the suggested pressure for Open Corsa CX at 100-180 lbs:

http://www.vittoria.com/tinasp/prodotti.asp?link=ruote.asp?ca_id=1
What width?Kerry Irons
Oct 14, 2001 4:50 PM
For a 23mm tire, you won't get much benefit in reduced rolling resistance over 130 psi (9 bar), just a harsher ride and poorer traction. Michelin recommends 110 psi (7.5 bar) for their 23mm tires for the best combination of traction and rolling resistance. For a 20mm, you may need at least 120 psi to avoid pinch flats, depending on your local roads and your personal style. Same issues with high pressures regarding ride and traction. Highly unlikely that there ever would be a need or any value in running over 130-140 psi in a 23.
re: vittoria open cx corsa question?Velocipedio
Oct 14, 2001 5:47 PM
120 seems like a nice number...

I'd worry about super-high pressure's effect on your rim... what's it's maximum rated at?
re: vittoria open cx corsa question?dbo
Oct 14, 2001 9:20 PM
I run 120psi in my CX tubulars and clinchers and that gives a great ride. Very supple.