I don't know. I think the most important thing for my sit-bones is the width and the "T" shaped seat-top. With the seat-post on the Kona Commutermobile the noise factor may be important. But I do like the springs, and Phil's bearing grease did take care of the noise once I moved my B67 to the Waterford.

Since I already have a B67, I think taking a risk on the B68 would be pretty ok. Anybody wanna subsidize my little experiment?

Ppppplleeeeeeezzzzz, someone buy my Serfas Niva.....