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  1. #1
    Junior Member omarcastz's Avatar
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    Deep section wheels (52 mm) for a light 125 lb rider

    All,

    I am currently using regular box section wheels for all of my riding (22 mm height front wheel and 25 mm height back wheel). These wheels are primarily referred as climbing wheels nowadays at 1300 grams but I use them for everything from long solo days on the hills to solo short fast rides to Gran Fondos, to Century rides, to group club rides.

    I have an opportunity to buy a set of 2012 Mavic Cosmic Carbone SLR wheels from someone who is upgrading to Zipp wheels with a Powertap. He is selling them to me for roughly 1k USD.

    Two questions:

    1. The wheels are in pretty good condition. Do you all consider this a reasonable price for this type of wheel? (old aero tech V-section shape, narrow width rim, carbon spokes). Seems like most aero wheel technology has moved on to toroidal shape, wide rims, etc. Even at 1k USD, am I buying into obsolete tech? (I am also aware that these need special brake pads).

    2. I am also a very light person (125 lbs). Though I plan on using these mostly in pretty flat to slight rolling areas, I am somewhat concerned about being blown off the side of the road or at the very least having quite a bit of difficulty controlling the front wheel. Any of you light people in this forum using deep section wheels? I was considering something a little shallower like a Dura Ace C35 wheelset for a second pair of wheels but I have chance at getting these for less than the cost of the C35s.

    I am going to be asking for a test ride on these wheels, however I may not be able to gather enough information from just one ride (especially if there is no wind blowing that day), thus I was asking the people in this forum who may have long term experience with deep section wheels and whether you stuck with them or not. Pros, Cons. etc.

    Here is the link to information about the Cosmic Carbone SLR

    By the way Mavic seems to have discontinued these wheels in favour of their newer Cosmic Carbone 40C carbon clinchers (which is why I don't link to the specs at Mavic's website). This is another thing that is giving me pause despite the steep discount. What say you all?

  2. #2
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    IMO, buy them if you want them, but i doubt you'll find them any better than what you've got.

  3. #3
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    If they're the AL-rimmed Cosmic Carbone SLRs, they do NOT need a special brake pad (although Mavic may have gone to a special coating on the AL rims the last few years they made the wheel that might need a special brake pad).

    What are you riding now? I've got a set that I got really cheap. They work well - they're definitely a LOT more aero then an AL clincher, but not as aero as today's newer wheels, nor as light. They brake better than all-CF wheels, though, especially in wet conditions.

    They do tend to be a bit wobbly in crosswinds, though, and I'm saying that at 200+ lbs and having been a competitive powerlifter...

    You might want to take a look at these:

    Specifications

    Or spend a bit more here:

    November Bicycles: Race smart. - Rail 52

    Oh, one nice thing about the Cosmic Carbone SLRs - you can use 60 mm tubes in them. I use threaded Conti tubes and use the stem nut to hold the stem so the few mm that do stick out don't disappear into the rim when I attach a pump. The stem nut also stops thread/rim rattle.
    Last edited by achoo; 08-19-14 at 06:32 PM.

  4. #4
    Junior Member omarcastz's Avatar
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    Currently riding a set of Mavic R-Sys SLR wheels which have an aluminum brake track with a special Exalith coating that needs special brake pads.

    The reason why I was/am considering the Cosmic Carbone SLRs is because I won't have to swap brake pads as these wheels have the same aluminum brake track with the Exalith coating of my current wheels.

    Not unhappy with my current wheelset, in fact they are great wheels but I was looking to add another set for flat rides, crits, etc. and keep my current set for days when I do long rides with a bit of climbing.

    Currently looking at aero clincher wheels with an Aluminum brake track. Not ready to jump on tubulars yet and don't feel like carbon clinchers technology is mature enough with regard to safety and braking performance. While the thought is that the new wheels will be used mostly in flats, I still value the superior braking performance of aluminium over a little bit of added weight.

    Your statement: "They do tend to be a bit wobbly in crosswinds, though, and I'm saying that at 200+ lbs and having been a competitive powerlifter..."



    This gives me something to think about as I'm pretty much the opposite of you (125 pound marathon runner). Perhaps not a good idea for me to be using deep section wheels...

  5. #5
    Senior Member I <3 Robots's Avatar
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    Scoop them up if you really want them. It'll only get wobbly in extreme winds. If its windy out...just swap out the front wheel for the R-Sys.
    Cervelo S2 | Zipp | SRAM | Rotor

  6. #6
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    If you plan on going down hills at 50+ mph in nasty crosswinds, yeah, they're not for you. But how many times will you get really gusty crosswinds? How likely is that for you on flat rides or crits? Conversely, how likely is it you'll get a good number of days for rides like that where there's not any significant wind?

    Because you can always ride them only when the wind isn't gusting - or just ride the rear and go with a shallower front. And if that's a good number of time, they'd still be worth it IMO. Even at my size, I can feel the aero difference, and a lot of times I just go with the front and leave my battleship rear training wheel on.

  7. #7
    Ex Coelis CALE262's Avatar
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    My wife is ~110lbs, she usually rides deep wheels (MadFiber 60/66mm) with no concern... It only takes her five minutes to swap to her R-SYS wheels/pads for shat weather conditions (not that she rides much in bad weather). I say buy them and have no regrets, I think you'll feel a noticeable difference over your current wheels
    Last edited by CALE262; 08-20-14 at 12:20 AM.
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  8. #8
    Senior Member kingfishr's Avatar
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    I have the even older 2009 version, and while they are incredibly strong, they are not very aero and they are heavy, I paid around $800 3 years ago, and would sell them if I could get $400 for them. Save your money and wait for a set of used Zipp 404s or just save your money.

  9. #9
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    Those Mavic wheels are heavy by comparison but are durable. But at $1,000 that's not a bad deal.

    The notion of being blown around in cross winds is over stated. After a few rides, you quickly get used to it. A gust makes people nervous at first until you realize its just a nudge and relax. People run into trouble by tensing up and making sudden jerky adjustments. Compared to the sail area of ride and bike, the surface of wheels is small. So it's a matter to recognizing a wind gust and going with it.
    You're just trying to start an argument to show how smart you are.

  10. #10
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    Quote Originally Posted by kingfishr View Post
    I have the even older 2009 version, and while they are incredibly strong, they are not very aero
    "[N]ot very aero" compared to what?

    and they are heavy,
    Zipp 404s: 1640g
    Cosmic Carbone SLRs: 1585g

    I paid around $800 3 years ago, and would sell them if I could get $400 for them. Save your money and wait for a set of used Zipp 404s or just save your money.
    If you're worried about overpriced, stay far away from Zipps.

  11. #11
    Senior Member kingfishr's Avatar
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    There are quite a few alternatives that have wider rims, allowing for wider tires and a more comfortable ride and better performance...
    http://www.cyclingpowerlab.com/Compo...odynamics.aspx

  12. #12
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    Quote Originally Posted by achoo View Post
    "[N]ot very aero" compared to what?



    Zipp 404s: 1640g
    Cosmic Carbone SLRs: 1585g



    If you're worried about overpriced, stay far away from Zipps.
    The tests I've seen have the Mavics rated about the lowest in terms of aero benefits. The actual weights run about 150g more than Mavics published amounts. Regardless 1600 g for carbon wheels this depth is pretty heavy. I should also mention I'm a Mavic fan.
    You're just trying to start an argument to show how smart you are.

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