Mark Stonich wrote:

Tom Sherman wrote in message ...
Mike wrote:

The wheels are too small for serious riding, it's a good city - commuter
bike.

And what exactly is wrong with an ISO 305-mm front wheel/ISO 406-mm rear
wheel combination that makes it unsuitable for serious riding?

Tom Sherman - Near the confluence of the Mississippi and Rock Rivers

IMHO, Absolutely nothing, if you have the right tires. Schwalbe is
introducing their "Big Apple" in 305-50, 406-50, and 507-50 sometime
in December. It is currently available in sizes ranging from 559-50 to
622-60. I'm hoping that 60s are available in the smaller diameters in
the future....

I would be curious to know if the small wheel recumbent market has grown
enough to make the introduction of these tires feasible, or if the sales
of small wheel upright folders are creating the demand. Certainly, the
situation is much better now than some years ago when according to Mr.
Stonich one had to resort to removing the knobs from BMX tires. [1]

[1] http://mnhpva.org/tires/tires.html

Tom Sherman - Near the confluence of the Mississippi and Rock Rivers