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Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 08-31-08, 10:13 AM   #1
kklaus
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Vittoria Cross XG Pro, 60 PSI Minimum?

These came on my new bike and I will be the starting point for cross tires for me. Clincher 32's on Mavic Aksium wheels.

Tire sidewall says min 60psi max 90psi .

Many people seem to have tire presure recomendations of 40-50 psi for clinchers depending on the course. Does anyone have any feedback on this combo at lower pressure than 60, and an outcome.

I expect I will be higher than 40 (as I weight 200#), but 60 seems too high to be the minimum.

I know getting out and riding will tell me the story but is there a reason for the 60 psi minimum that I should be concerning myself with?

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Old 09-06-08, 09:04 AM   #2
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You should be fine. You'll see soon enough; if they're rolling off the rims in corners or you get pinch flats, you might want to switch.

I weigh 150 and ride light, and I've run Michelin Muds down in the 25 psi range without problems.
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Old 09-06-08, 09:48 AM   #3
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Also, remember to use some talc or something similar on your tubes. This will help to avoid pinch flats.
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Old 09-09-08, 08:32 PM   #4
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I got a set of these last year, and I was skeptical about the high pressure rating as well, but I like to ride my tires a little harder than most. I tried once to run them down around 45 and when I did that it felt like they were going to roll off the rims when cornering hard, so back up to 60 they went. Might have been mental and I need to try again this year on one of my training rides, but that was during a pre-ride for a race, so wasn't going to mess around with it.
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Old 09-19-08, 01:06 PM   #5
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These came stock on my new bike and I've been riding them at 45-50 psi, I weigh ~170. I haven't felt like they were going to roll off the rim, I tried them at 60-65, but they were too harsh and I was sliding around a lot in soft stuff.
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Old 09-19-08, 01:46 PM   #6
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we're talking about the diamod tread vittorias, right? i raced one in the rear last year at ~35 psi, never had a flat or problem, and this season riding one in front at ~30-35 psi has not been a problem, either - no flats, no tires coming loose from the rim, anything.
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Old 09-19-08, 01:50 PM   #7
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Recommended pressures are always conservative.
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Old 09-19-08, 07:19 PM   #8
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Ok on my training ride this week I set them to about 50 and they felt good, so must have been a mental thing last year. Next weekend is the first race of the year so I will report back how they worked in the race.
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Old 09-22-08, 07:14 AM   #9
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I've run the XNs at 30psi and I believe they are the same casing, different tread.
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Old 09-22-08, 11:18 PM   #10
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Thanks everyone.
I have been riding them and using lower presures each time.
I am at 45 rear 40 front and no problems yet.

I think I only need some new brakepads and I am set for some races.
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