probikekit.com

Hopefully, I'm not covering ground that has already been beaten to death. However, I just placed my second order with probikekit.com. They are a mail order company out of the UK. I have found that the prices on tires (or tyres as they say... Silly Brits when will they ever learn American? ) and pedals are really cheap. Their other products are worth shopping around too, but seem to be more inline other sources. Plus, no taxes or shipping fees. If you check out their site, make sure to choose the proper location so the prices are in the correct currency. They don't have a lot of tri specific stuff, but just thought I'd pass my experiences along, FWIW.