why the conversion to 650b on the vintage rigid mountain bikes ?
why change from the 26” wheelsets ?
Because it allows you to run the exact same tire diameter on a smaller and faster rolling tire without changing the bike geometry nor having to pedal more revolutions for the same distance. That last bit is more of a cadence thing than anything.
Rim on the left is 26" with regular mud tires, rim on the right is 650b with 35mm tires. You can see that the rim on the right is bigger but the end size is identical.
