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Old 09-12-08, 05:52 AM   #1
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Q's about tubeless/tire pressure

I have been experimenting with low pressure clinchers for cyclocross. Currently I have a Mavic wheelset on my cyclocross bike, and Conti Twisters for tires. I have been running standard tubes.

I have been running low pressure, somewhere in the region of 35 psi front/40 psi rear. Traction is AWESOME, I recently headed out on some wet ST and I can corner very well in mud/wet stuff. No pinch flats either, although I did strike the rim once or twice on roots.

BUT - these tires feel really squirmy when actually cornering hard! the feeling is scary, like its about to roll off the rim! they are squirmy to begin with due to the big side knobs, but yikes!

Should I try and run tubeless? the mavic rims are the "no rim hole" ones, so all I should need is a valve core. Any suggestions for better tires? I know Hutchinson makes a tubeless ready cross tire....

I am asking this questions since no one in CX has experimented with tubeless....but you guys certainly have!
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Old 09-12-08, 10:29 AM   #2
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I haven't ran tubeless in Cross tires, But I have experienced exactly what your talking about in standard mountain tires. The sidewall is a little thinner, so the tire tends to roll and squirm at low pressure under hard corners. Even to the point of burping the air out.
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Old 09-12-08, 02:58 PM   #3
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I Would say, as long as it doesn't burp, it's fine.

I have no experience with cross tires but have never burped a regular MTB tire set up tubeless with pressure higher than 20psi

It all depends on the bead and sidewall though. It is a touchy situation to be sure.
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