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32 or 34?(8 posts)

32 or 34?triangleforge
Dec 19, 2002 6:53 AM
I'm thinking of spending a little holiday good cheer (including a very welcome gift certificate from Cyclocrossworld.com -- thanks, Pavel!) on tires for next season, and am thinking hard about going full-boat with the Tufo Elite LPS, either in 32 or 34.

I recall Mtnpedaler's note here a bit ago that his riders preferred the 34, so that's where I'm leaning. On the other hand, these are to be on my main race wheels, so I'd like to cover a fairly wide range of conditions with them.

For unusual conditions, I'll still have some other options, including a set of box-section rims w/ very narrow (27c) Clement Grifo Neves, a front file tread Grifo that's probably around 27 or so, and 'cross clinchers from 35 to 38.

I race in the Mid-Atlantic, so lots of clay soils & grass, with occasional single-trackey bits.

Any suggestions?
32climbo
Dec 19, 2002 8:44 AM
I and many others in the MAC area are on the 32's. 34's to me would be just too big, the 32's are big enough to be comfortable on the bumps and grippy in bad conditions. If the mud and snow gets really bad I'll go to some Michelin Muds but the Tufo's are great in all other conditions, sand, grass, pave etc.
32 vs 34Eric Marshall
Dec 19, 2002 9:06 AM
This is just a difference of 2mm isn't it? If so, how could anyone tell the tires apart when riding?
32 vs 34climbo
Dec 19, 2002 10:29 AM
? I doubt I could tell while riding but looking at a Tufo you can see a difference between a 30, 32 and 34. It makes a small difference with clearance to your brakes etc. also. It seems small but maybe it's not. The numbers might not mean every tyre is exactly 2mm bigger, it could be more than that, the numbers are just a guide. Kinda like the Michelin's that measure 700x30 on the sidewall but are in fact much bigger than that compared to other 700x30 tyres.
I'd imagine a differencetriangleforge
Dec 19, 2002 12:22 PM
There should be a difference, if for no other reason than a significantly different volume of air in the two tires -- a lot more than you might think. Just figuring the area of a circular cross section of the two tires, I get an area of 804mm for the 32 & 907mm for the 34. Right 'bout there, my high school geometry starts to peter out, so don't go looking to me to calculate the total volume of the two tires. Still, on a low-pressure tire, that's going to translate into a notably different size contact patch, for good or ill.

That, and I know I can tell the difference between a 21c, 23c & 25c road tire at identical pressures, even though those are only 2mm apart.

Cheers & thanks for the input!
maybe this will helpatpjunkie
Dec 19, 2002 1:49 PM
if you are either big or aggressive and/or ride on harsh terrain go 34. If you are smaller and ride clean on nicer surface (grass, pave, etc..) go 32.
maybe this will helpEric Marshall
Dec 20, 2002 6:54 AM
So who or when would you use the 28 or 30 sizes?
maybe this will helpatpjunkie
Dec 20, 2002 11:20 AM
smaller more agile racers on hard pack, grass and pavement. It's like MTB's IMHO the only people who ride sub 1.8's are pro's. I've seen guys racing on as small as 1.5's. At 230 lbs the only 30's I ride are Michelines(sp) as they are more like 34's