Here's a question about a weird (but good) discovery I've made recently. This situation has occurred many times, withthe same result:

- I'm going up a hill with a group.
- We crest at the exact same speed, then free wheel for a bit.
- I run away from the others.
- Some of the other riders are bigger / heavier than me, others are smaller / lighter. Makes no difference.
- There's no slipstreaming.

I rode RAGBRAI last week, and over those 500 miles I had dozens of opportunities to deliberately test this situation. I tested it by slowing down a bit to let the others run away from me, yet my bike still accelerated and caught up. I tried to skew the results every which-way - but got the same result every time: My (almost) factory-stock CAAD9 simply freewheels faster than anything else I've come across. The only changes I've made is the tires (Conti GP 4000 S 23s).

This is obviously not a complaint, though I'd be curious to know what could be contributing to this welcome advantage.

Any thoughts?