Power measurement on the bike makes sense - it's no coincidence that hardly any professional cyclist does without it during training and racing. However, some people are bothered by the fact that it makes the bike heavier. The new, modular carbon crank THM Clavicula M3 (more detailed Test in TOUR 12/2011->) can be combined with SRM's power meter, thus putting the tried-and-tested power measurement system on a diet. Compared to the current Dura-Ace SRM version, the Clavicula combination weighs 741 grams and is 110 grams lighter, but slightly less stiff.
Over 5,000 kilometres, including the seven stages of the TOUR-Transalp 2011, the crank was an inconspicuous companion. The shifting behaviour is somewhat inferior to the Shimano cranks, but has always been good, even with the Di2 electronic shifting system. The seventh edition of the Powercontrol handlebar computer (PC VII), which is part of the SRM system, is finally and almost completely convincing (the somewhat cumbersome operation typical of SRM remains unchanged) with a significantly longer battery life and sufficient storage space.
One pleasing aspect of the SRM diet from THM is that the complete package comprising SRM power meter, crankset, bearings and PC VII costs around €3,400, which is around €450 less than the Dura-Ace set. Compared to the version with Campagnolo's Super Record, it is even 1,000 euros less.
PLUS light; battery life; memory; price advantage
MINUS Sensitive mounting
Continuous test performance 5,000 km
Price 3,400 Euro
Weight 741 grammes
Reference/ Info www.thm-carbones.de and www.srm.de
