+1

I see what the racer wrote, but it's not simple. You fall of the pace of that pace-line, and at 56t up front, even with 650c wheels, you're not getting right back on speed. You can't (or I can't, anyway) get back on by jumping a couple of cogs, and spinning up. You (or I) have to climb about 6 cogs, and work your way back. By then, I'm 200' back and losing. It's easier to keep pace, but a lot harder to get back up to it. Great climber, though.

On the other hand, there are the "funny" bikes with the 650c front wheels.

And on another hand, there are plenty of 650c tri-bikes still out there. Sometimes, the tri-bike positioning lends itself to running a little higher cadence than normal, and that's necessary when you're running 53/39 on 650c wheels.