My son and I rode a CoMotion with the belt this summer and in several races:
We fell in love with the setup from the first ride. The first things
we noticed is that it is very quiet with a noticeably smoother
pedaling feel. We were unaware of how much cog vibration was coming
from our timing chain until it was gone, replaced with a belt.
We both felt a more "direct" connection with the rear wheel - that is,
maximum attack efforts, both on climbs and sprints, translated
directly to forward motion of the team. Traditionally, a tandem can
often feel like you're winding up a "elastic" connection to the drive
wheel. But with the belt we felt the team could respond nearly as
quickly as a single bike.
In our first crit, we could attack at will and drop the field - though
they would catch-up over time as there were MUCH better TT teams in
the bunch. But we used this explosive acceleration to win both the
Prim and the overall victory. A great quote from that race was from
the Mick Walsh, captain of the second place team. "I've never seen a
tandem accelerate like that."
At the CoMotion classic you can see were we sat after the TT - some
very strong teams in the field. At the crit we were bested by the
Canadian National Paralympic team, but were able to get away from them
and the reset of the field on the last climb of the road race.
We sadly gave the belt-drive back to CoMotion and went back to our
timing-chain for the Oregon State Crit Championships:
.where we finished 5th over all. We were both shocked at how sluggish
the tandem felt! On the drive home we were both laughing a bit about
how we had been convinced before that our previous performance was due
to us as athletes, but now realize it may have been more belt than