Clamping carbon frame in bike carrier?

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Hello Everyone,



I'm after a new bike carrier and was looking at Thule towbar mounted one which has the arms that clamp into the frame but have been told that I can't clamp my carbon frame?



Is this right? If so what other options are there? Don't want a roof carrier.

Any Idea , Suggestions would be appreciated,



Thanks,



I didn't find the right solution from the internet.



References:http://www.bikeradar.com/forums/viewtopic.php?f=10002&t=13085786

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