maximum rider weights for carbon frames.

rikmellors
rikmellors Posts: 11
edited February 2013 in Road buying advice
i'm currently riding a cannondale synapse 6061 frame bike, i was 148kg when i got it and i'm now down to 137kg. i had some wheels built for it as the stock wheels just were not up to the job but i'm really enjoying my cycling and despite the weight in KG's i'm not as fat as you would imagine as i'm 6'3" with a 54" chest and 40" waiste and huge legs from playing prop at rugby. I have very good power but i can visibly see the bottom btacket flexing when putting the power down (especially on hills). i did some research when i bought the cannondale which had maximum rider weight of 128kg's but then also allowed 20kg's of luggage which is why i bought it. at best i think i will get to around 120kg but not likely to get below that so was looking for some advice on a better spec bike probably carbon (if possible) but i like the idea of the di2 changers so probably will look at ultegra but not dura ace.

i have been doing between 70-100km per week even therough the winter months as i've been using a turbo trainer and i am comfortable doing 20-25km blasts round but also looking to longer rides. the longest ride i've done is 68km and made that ok. i dont think i'm likely to ride 100km stints all that regualrly i just havnt got the time to toddle off for 3-4 hours without grief from the family. thatnks for listening an i look forward to any suggestions on what to look at?

Comments

  • First thing, I think you did a good job buying yourself into some durable wheels. But basically you're looking for carbon frames that can stand a little 'abuse' of high torque riding. Carbon frames are generally stiffer so in a good frame you might experience less lateral compliance. Now there is more to be said than just stiffness and durability when it comes to picking a carbon frame that is right for you. Personally I have the experience (working in a bikeshop for a couple of years) modern high-end carbon bikes (cervelo r5, supersix evo) can be a little bit under build due to their excessively low weight. These are in fact exceptions to the rule of carbon bikes should perform very consistent under 'high' stress. I'd recommend something like Scott Foil 15 or Trek Madone 4.9 (both ultegra di2). They are just very good bikes from which I've never had any complaints nor worries with rider weight limits. Note that most big bike manufacturers don't state these limits. So it's up to your experience on them which one you will give the most confidence.

    good luck!
  • desweller
    desweller Posts: 5,175
    To be honest mate, the slight weight saving you'd get from a carbon frame wouldn't be a significant factor in your case. If you're after a more compliant frame then you should also consider good quality steel.
    - - - - - - - - - -
    On Strava.{/url}
  • Thanks Chris the trek madone was something that has cropped up on my research. Thanks for the reply des but it was not the weight of the bike cos to be honest I could ride on a 2lb bike and would make no difference. My issue is one of flex and getting the power down. I'll have a good look at the trek I think. Thanks chaps
  • LegendLust
    LegendLust Posts: 1,022
    If your budget will allow, Marco Bertoletti at Legend can custom build you a carbon frame to suit your weight and power. As he produces his own carbon tubes he can lay these up to provide the ideal frame for your needs.

    http://www.legend-bikes.com/Products/Carbon.aspx
  • At your weight I'd be looking at getting something bespoke built ( prob' steel...they can be built stiff...think 'The Forth Bridge') specifically to take the punishment that you're going to be dishing out.....as you cycle more and become (cycling) fitter and stronger it'll just get worse for your poor bike!!
    It's only my opinion but I wouldn't chance a mass produced carbon frame in your shoes