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Gravel road race, kenda cross supremes, PSI?

Cyclocross and Gravelbiking (Recreational) 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.

Gravel road race, kenda cross supremes, PSI?

Old 09-18-12, 09:41 AM
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jbrow1
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Gravel road race, kenda cross supremes, PSI?

Doing a 40 mile gravel road race this weekend. I have kenda cross supremes, 35mm and the max pressure is 85 I believe. Wondering if I should just air em right up and go that way. Not expecting traction issues, my ass can handle the hard ride, I rode 60psi the other day and liked it, guess I better try couple rides this week at higher PSI's. Was just curious if anybody thinks they would roll better at higher psi, would like something like a 32mm small block eight, but the supremes are what I am stuck with for now.
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Old 09-19-12, 08:23 PM
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i ride gravel (~30 mile group rides) 2x weekly. Rarely above 40-45 PSI. I weigh 195lbs. I have done gravel races at this pressure as well... no complaints. you don't want to be bouncing all over those rocks, you want to conform and roll over them. Rolling is better than bouncing
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Old 09-19-12, 10:20 PM
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Honestly that's a terrible tire for a gravel road race. A semi slick is the way to go. Michelin Jet, Ritchey Speedmax, Clement LAS, Challenge Grifo XS.
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Old 09-20-12, 03:28 PM
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jbrow1
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Thanks Adam, I believe I've seen you at some races around. Tour de Frankenmuth this year and Big Bad Wolf cx last year, with the crazy bastards crew? I was the guy in the C race chasing ole Marc around at that race I'll have to try some different pressures out the morning of the race I suppose. I did 45 miles with pavement/gravel/singletrack at 45 psi and it wasn't to bad. Ran 60 the other day as mentioned and it felt like it rolled better, did a quick 16 miles this morning at 80 and that rolled nicely too. I was thinking exact same thing tough, the lower pressures would stick to the rock and trail part of the race better most likely.

Rivet - I agree there are much better tires but this is what I have for now. See how they work and maybe get something else for the race next month. At this point I've been feeling like crap for a week now, so the tires are probably going to be a moot point anyhow.
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Old 09-20-12, 10:41 PM
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Originally Posted by adam_mac84 View Post
i ride gravel (~30 mile group rides) 2x weekly. Rarely above 40-45 PSI. I weigh 195lbs. I have done gravel races at this pressure as well... no complaints. you don't want to be bouncing all over those rocks, you want to conform and roll over them. Rolling is better than bouncing
I am about the same weight (actually a little less now) and whenever I ride at that low a pressure (say below 60ish) I always feel like I am bottoming out and I can feel the rim hit the dirt. Is that just in my head or is there something else going on?

Last year was my first on my cross bike riding off road, so I am still figuring some things out.
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Old 09-21-12, 11:53 AM
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For riding road and harder surfaces I usually inflate just enough that the bike doesn't bob with my pedal stroke or feel too squirmy in the corners. At my weight (175 on a good day) that usually means about 45/50. I'll often go slightly lower when riding a cross bike on the road just to work on my pedal stroke and try to smooth out the bob as much as possible.

I go even lower for cross racing, but I've learned my lesson about running my cross pressure on the road.
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Old 09-21-12, 12:14 PM
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I would gas them up on the high side 80 in the back 70 up front. But I am 205lbs too so...
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Old 09-21-12, 04:20 PM
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165 pounds, I like running them 30-40ish in singletrack, seemed to like higher on the roads though. Think I will just pre-ride a bit in the morning for warmup and try a couple pressures. Suppose it depends on the weather tonight anyhow. Never been there so don't know if the rain will pack it or make it a mudbog.
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Old 09-22-12, 07:08 AM
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what race is this? Hope it all went well. See you at Stomach of Anger tomorrow?
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Old 09-22-12, 01:57 PM
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It was the ronde van stoney 40 mile gravel road race. Pretty killer race, lots of hills and some fun two track. The tires were not the problem today, I ran 65F 70R, great traction in the mud and two track, problem was I lost my legs Flatlander goes to hilly area and gets spanked when the legs quit near the end. Great race though, recommend it for sure! I'm over in Canada now for a wedding, no race tomorrow for me. Next one will probably be the Lowell 50 that I can make, then maybe some cross races after that hopefully.
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Old 10-03-12, 10:14 AM
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Well now that I'm over being sick forever, and not feeling like such a puss, I've been doing alot of riding on these kendas and trying pressures. 35 F/R seems to be the ticket everywhere. I really like how 30 feels in the woods but to many wheel bumps and luckily no pinch flats. These tires are badass in the dirt and in roads that get sandy too. Yesterday we got in some roads that got sugar sandy and these things faired much better than hotshot8's, and other file tread type tires. Still not the best choice for racing IMO, but for a training and all-arounder tire the kenda kross supremes are a helluva bargain.
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Old 04-06-15, 05:11 PM
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BRX pressure

Originally Posted by adam_mac84 View Post
i ride gravel (~30 mile group rides) 2x weekly. Rarely above 40-45 PSI. I weigh 195lbs. I have done gravel races at this pressure as well... no complaints. you don't want to be bouncing all over those rocks, you want to conform and roll over them. Rolling is better than bouncing
Adam, what pressure were you running last week at BRX?
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