First thing to do is find out how long the rides take them. If they're
super sporty fast riders who do it in 45 minutes, then don't bother.
However, if they're just social riders, they'll probably only average
something around 10mph including stops and the like.
Or it might be something like Critical Mass, where they go slower than
that usually and you'd have no problems keeping up on your normal uni.
If they're social riders, you need either a 29er with short cranks, or
a 36" of some kind, like a coker or a Nimbus 36" (which I don't think
is out yet but will be some time soon). The 36" is probably easier to
ride at bike speeds.
Don't expect to be able to get onto either a 29er or a 36" and just be
able to average 10mph right away. It does take practice. But a fit
person who is a good rider can average 10mph on either wheel size with
a bit of practice, and if you practice more, averages of 12mph on the
coker aren't too hard, and are achievable on the 29er. You're a
student, so you've got the time to practice, so it shouldn't take too
long to get used to the new wheel size.
The other possible thing is that if you're pretty fit and they're only
riding at 10mph or so, you could bung short cranks on the 26, and a
smooth fat tyre (110s would be my choice for cranks, and a Big Apple
tyre) and probably be able to keep up with a bit of practice. Would
save you having to buy a new uni, although it would be hassle swapping
bits over when you wanted to ride muni again.
Joe
--
joemarshall
my pics http://gallery.unicyclist.com/albuq44
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