Old 11-07-21, 01:17 PM
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Originally Posted by Dfrost View Post
Here’s a visual comparison of different wheel+tire sizes (actual width) on the same tall frame, in this case my 63.5cm ctt Marinoni. I switched from 175mm (shown in the 700x28 and first 650x38 shot) to 170mm cranks after installing the 650B wheels, but pedal strike was not the issue - that “risk” is overblown unless you race criteriums and must pedal through corners. My 7-decade old knees like the change! FWIW, I go back and forth between 700x32 and 650x38. Lately using the latter more since the bike feels more relaxing, certainly much nicer on rough pavement, but absolutely no slower with the fatter tires at 50-ish psi. Not sure yet about the black 42’s in the last photo, but they’re sooo smooth yet very secure at 40/45 psi! Maybe if I actually enjoyed riding on lots of gravel, more than the occasional hard-packed dirt road. BTW, all tires are Grand Bois or Compass/Rene Herse EL, so they’re all light, supple and faster than I am.

700C with 28mm tires

700C with 32mm tires - maximum that will fit, and BTW those are short reach brakes!

650B with 38mm tires

Fenders with the 650x38’s, which affect the visual balance significantly. No room for fenders with the 700’s. If long rando-type rides are likely, fenders will be a welcome improvement.

650B with 41mm (42 spec’d) blackwall tires. I was recently got these for an incredible price, and no chance yet to take better photos. Not sure about the all black tires.
It's amazing how much tire sidewall color affects the overall look of a bike. The difference due to 650b vs 700c is nothing compared to black vs tan.
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