On Jul 11, 8:44 pm, Tom Sherman
wrote:
Peter Rathman wrote:
On Jul 11, 8:10 pm, Tom Sherman
wrote:
They could always convert their bicycles to ISO 684-mm (aka 650B)
instead.

650B is ISO 584 mm (not 684) bead diameter

Why do they put the "5" key next to the "6" key?

which is a considerable
jump from the 630 mm of the "27 inch" size. Conversion to 700C (622
mm) is frequently feasible, but hardly economic for most owners of an
old Schwinn Varsity.

Have you missed all the discussion about Grant Peterson promoting the
ISO 584-mm size?

I don't think even Grant advocates conversion of frames made for 630
mm and long-reach brakes to 584 mm. Doing it for frames made for 622
mm and short-reach brakes is bad enough, but at least it's frequently
rather straight forward.