It will be interesting to see the impassioned debate from those who take this seriously. It will be sort of like the clincher vs. rubular rolling resistance threads (a red herring, in my opinion) - too small a difference to measure meaningfully (I raced for three years on 650 in the early QR days so have experience with it even though I'm 6'1" tall and probably would have trouble finding a 650 bike in my size these days).

Don't poke the bear.... particularly when he's tapering

There are too many possible variables to determine before you can really answer this question. The only response is that it depends....

Well, I believe that a 636cc is faster than a 675cc. but the 599cc is a bit faster than the 636cc, by virtue of slightly lighter weight and slightly better aerodynamics.

That said, I really want a 999cc

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Swimming Workout of the Day:

Favourite Swim Sets:

2020 National Masters Champion - M50-54 - 50m Butterfly

Actually I have a 1450 and a 1200. Sold the 500 and used the money for a tri bike. Actually the bicycle cost twice that of what I sold the motorcycle for.

I wish I still had my 125.

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Swimming Workout of the Day:

Favourite Swim Sets:

2020 National Masters Champion - M50-54 - 50m Butterfly

My 750cc was stolen on New Years day two years ago, now I rely on my internal 30cc (or whatever the heart volume is). I guarantee, the 750 was much faster.

Chris
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Chris
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“Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!”
― Hunter S. Thompson,

Did you try a "Search Posts"? There's lots of excellent responses to this question here

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Paul "Speedy" Gonsalves
http://www.rollingthundercanada.com
RollingThunderCanada

Canadian distributor for HED Cycling, Blue Competition, Akona Biospeed & Aerus Composites

If you're riding with Monty...the answer is most certainly 650 :)

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Michael in Fresno
"Do you spend time with your family? Good. Because a man that doesn't spend time with his family can never be a real man" V. Corleone

650 or 700?

it won't matter because your seat's too high and you don't train on power cranks with dimpled biopace chainrings!!!

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I reject your reality and substitute my own!
Adam Savage