I am having a serious problem with front-end flex (particularly when I'm out of the saddle) on one of my two road bikes and I'm trying to figure out what is the primary source -- frame, fork, or wheel. The bike that I'm having trouble with is a Litespeed Teramo (compact geometry, lower-end frame, G.E.T. tubing but not double-butted) with a Real Design fork (Litespeed house brand - not sure who makes it but I'm guessing Mizuno) and Easton Circuit wheels. Any guesses as to the primary source of flex?

My other bike is a Merlin Magia with an Easton EC90 SLX fork and Campy Neutron wheels. This bike rides as if it has its own energy source. It is a joy to ride -- and I don't have a problem with front-end flex. Given the lightness of the Magia frame, I'm guessing the problem with the Litespeed is not the frame (although what do I know? -- maybe it is). My next step is to put the front Campy Neutron on the Litespeed and see if the situation improves.

In the meantime, any theories/ideas you might have would be quite welcome. Thanks!