Originally Posted by
hack
Did a TT last night ... not sure what's up, but since I've gone to a disc (Zipp 900) I've gotten slower. Weather has been consistent, power has gone UP and I'm coming in like 20s slower. Perplexed really. It spins fine on the hub, not rubbing, and tire pressure seems ok. Previous wheel was a Reynolds 66. May go back to that on my next run and see what's up.
Its because you're putting out so many watts, its affecting the Earth's rotation.