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Shimano WH7850 C24 CL

Jul 9, 2009
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I'm considering buying a set of the 2010 shimano dura-ace C24 Clincher as my every day wheelset for my new Marin stelvio Utegra. Every review that i've read seems to say that they are the best clincher wheelset at this price, but I'd like to have the opinion of some of you guys that have been running these for some time? Are the worth the money ? Thanks for you input.

Louis
 
Jun 16, 2009
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I've been riding and racing on a set for a few months now and I will say that they are a very fast and predictable set of wheels whilst at the same time i am completely confident training over broken ground on them.

I'm a large rider and they just seem bombproof to me. There is no noticable flex on climbing or sprinting and they accelerate really well.
 
Jul 9, 2009
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James Jordan said:
RS 80 are a better option. same rim with ultegra hubs for half the price

I don't think the RS 80 are available in North America. Although the share the same rim, they are more than 100g heavier with lower quality hub. I dont mind the higher price of the dura-ace anyways since i'm looking for something that is significantly lighter than my old ksyirum elite.
 
Mar 12, 2009
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NRS_Comp1 said:
I don't think the RS 80 are available in North America. Although the share the same rim, they are more than 100g heavier with lower quality hub. I dont mind the higher price of the dura-ace anyways since i'm looking for something that is significantly lighter than my old ksyirum elite.
Pity that they are not available, great set of everyday wheels for the price.

I am not quite sure why you say they are a lower quality hub. Both Dura Ace and Ultegra use exactly the same berings, its just that Ultegra uses a heaver casing.
 
Nov 28, 2009
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I bought some about 6 months ago, put some conti 4000s on them and i love them. First place i went was the Dandenongs in Melbourne and absolutely smashed my previous best. I consistently used a higher gear but where i really noticed the difference was on the descent. They just felt so sure. I could just pick a line and hammer it. I didn't hit the brakes once! Two thumbs up from me.
 
Mar 4, 2009
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The Ksyrium SL is absolutely a stiffer-riding wheel, particularly up front. That paper-thin aluminum extrusion Shimano uses beneath the carbon seems to be the key as it's noticeably smoother-riding than the vast majority of wheels out there.

Torsional stiffness seems quite comparable between the two though the Shimano one *maybe* gets the edge - tough to tell absolutely without a test jig.

In addition to the comfort thing, though, cornering traction on the Dura-Ace wheels is awesome and very confidence-inspiring. Especially on bumpy tarmac, the softer rim is better able to keep the contact patch glued to the ground.

As for bearing smoothness, I'd say if anything the Ksyrium has the edge if side loads aren't involved. Though they definitely require far more regular servicing than Shimano, virtually any bearing issues I've seen with Mavic hubs over the years (both in my current capacity at CN/BR and nearly 15yrs as a shop mechanic) have involved users overtightening the preload collars or letting the freehub bodies run dry for prolonged periods of time.
 
Jul 9, 2009
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Thanx for your comment james, seems I'll be getting this wheelset after all. They just seem like a perfect balance between weight, stiffness and comfort. Can't wait to try them for myself.

Cheers!
 
Mar 12, 2009
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I will agree with the other James in regards to Mavic hubs being a bit more maintenance intensive. I also work as a mechanic in a shop, which is why reservations about the availability and cost of their spokes when it comes to Mavic wheels. Mind you the same can also be said about some of the new Shimano wheels.

Shimano hubs, especially Dura Ace, use a bearing set up which handles angular stress better then any other I have tried. I would suspect this is why they handled the cornering on the decent so well. My only dislike about the C24 is during Crit racing, the just don't that style of hard cornering where you lean the the bike right over.