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Carbon rims and descending big hills………..

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  • June 23, 2017 at 10:20 am #27264
    richcrocker79

    I know this question has been done to death historically, but all of my recent googling brings up links and horror stories from four or five years ago.

     

    My question is reasonably simple, I have a set of Fulcrum quattro carbons which i love. I am heading to France in a couple of weeks, staying near Mont Ventoux and riding up and down it a few times. Will I die on the descent if I use the Fulcrum rims? they have the 3Diamant braking surface, which is supposedly fine, but the best I got from Fulcrum was ‘we’ve never had any complaints about the braking surface’

     

    Has anybody had any real world experience of a current technology set of carbon clinchers on long steep descents? I know they will get hot, I’m aware of not dragging brakes etc. but will they fail?

     

    Thanks

     

    Rich

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  • June 23, 2017 at 11:48 am #895713
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    Mungecrundle

    I’m sure that wheels are
    I’m sure that wheels are better nowdays but my experience from quite a few years ago of braking on carbon rims (HED trispokes without the metal braking track) was adequate in the dry and utterly terrifying in the wet. I have in my time also witnessed a carbon rim disintegrating during heavy braking on a steep downhill.

    June 23, 2017 at 10:50 am #895711
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    CycleDivvy

    I used a set of Cero RC45s

    I used a set of Cero RC45s which I’ve never had any issues with on descents, although granted i’ve never been down Ventoux on them.

    I think the quality of carbon wheels has come on so much in the past few years that you don’t hear many of these horror stories anymore. Descent with confidence!

    June 23, 2017 at 10:29 am #895709
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    Canyon48

    No real world experience, but

    No real world experience, but…

    Look at the speeds the pros were hitting in the Tour de Suisse, 120kph+, their wheels didn’t fail.

    Not to say they don’t fail – ever seen the video of the guy riding a Canyon down Mount Ventoux and he overheats the pads?

    Comes down to how heavy you are and how much breaking you are doing. Personally, I wouldn’t be too worried about using a pro level set of carbon wheels on a descent, one would hope that they have been tested and designed against failure.

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