Cyclocross - Wheel strength question
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Are these wheels about equal strength for my weight? 150lb, 5'10.
2x open pro 32 hole
3x open pro 28 hole
Hubs are chris king classics.
Spokes are same on both builds.
10-03-10, 12:46 PM
More spokes = stronger wheel.
I don't think the different crossing patterns have anything to do with it. In general you want the maximum possible number of crossings on a rear wheel to make the spoking as near to tangential as possible. People will use fewer crosses on non-drive-side spokes, I think the idea is that since they are under so much less tension than drive-side, they don't transmit as much torque. (Hm...I have to think about that one....)
More crosses put less strain on the hub flange, but I think most hubs nowadays are approved for radial spoking. I've never seen a hub flange failure, but I've seen plenty of rim failures.
With a light aluminum rim, I would want 32 spokes for the rear.
10-03-10, 04:36 PM
at 150 you'll be fine haha... Check out the clyde section for those (us) wheelbenders. I have been crossing all season on Fulcrum racing 7's. I roll about 220# minus bike. Rear is 24 spoke, and i have hit some nasty ruts and holes with these wheels on and off road, with no problems
10-04-10, 05:50 AM
I'll bet those rims on the Fulcrum wheels are substantially heavier than the Open Pro, and I think (?) they have 16 spokes on rear drive side.
10-04-10, 11:00 PM
Are you worried about them breaking? 150 lbs with 32/28 should be more than enough strength. it's a pretty common setup. Open pros are super solid rims. Plus, cross tires are run at a substantially less psi which means the tires will soak up a lot of the rough stuff.
10-06-10, 01:16 PM
I am currently riding (because I am lazy and don't feel like fixing the "race" wheels) a 32h Ultegra/Open Pro in the back and a 32h(I think) Mavic wheel that is really gosh darn old and has that funky star shaped plastic looking hub flange with straight pull spokes that predates the Ksyrium. I rode these on 3 short track mtb races on my cross bike and a cross race this Sunday. I bought the set for a whopping $80 on craigslist.
Did I mention that I weigh 220lbs and most of it (not all by any means) isn't fat. In other words, while I don't have a Powertap, I think I do OK in the torque/watts department. You are a measly 150 lbs. I eat that much for lunch and breakfast put together.
If you are actually still reading: YES, those wheels are strong enough. Unless you are planning on riding off of cliffs.
Flargle: Is an Open Pro considered a light weight aluminum rim?
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