The problem typically happens when shifting from the small ring to the large ring. The chain seems to jam up against the front derailleur, thus locking the crank. At this point , I have no option but to dismount and untangle it.
My LBS assures me the bike is in perfect working order. If so, then I guess Iím doing something stupid. Iím familiar with the ďbest practiceĒ of shifting when the chain is in the middle of the cassette but it doesnít seem to help.
FYI that this is my first tri bike, but I've down 1000s of miles on my road bike (Trek Madone 5.2) which has exactly the same Ultegra chainset and Iíve never had any problems with it, itís been bulletproof.
The main difference is the friction shifter on the P3 which does take some getting used to.
Can anyone advise what Iím doing wrong, because this is very frustrating. I cannot even begin to consider using this for a race until I know this problem is behind me.