I've not been following this thread, but here's my two
penn'orth.
My Pashley 26 has a Gazz. 2.3 tyre which is considerably
better at everything than the 1.95 I had on before. The
difference is amazing.
But the day I fitted the 2.3, I had a ride on someone else's
3.0 and that was a whole league division better.
So definitely, a big fat soft tyre will make a huge
difference to your uni's ability to cross soft and shifting
ground, bumps and roots and all manner of things. It will
hop better and drop better.
But on the other hand, it will be slower and harder work on
the smooth sections.
But ask yourself what sort of riding you like to do. How
often will you be slogging up steep hills? How often will
you be going down steep hills? Do you do drops? Do you like
to ride distances?
For comparison, I have ridden 20+ mile days on mixed single
track and forest track on a 700c x 32 mm tyre, and 110mm
cranks. I have ridden many miles on forest tracks and single
tracks on a Coker with 150s. I have even done some quite
difficult stuff on a 24 with 102mm cranks.
On the other hand, I just couldn't get on with 170mm cranks
on my 26. The extra leverage was great on descents, made
suprisingly little difference on ascents, and made long flat
sections 'orrible.
I like to find a uni that feels right to ride, then ride it
to the maximum that I can achieve on it, rather than making
the uni really heavily specialised, and making big
sacrifices in several areas for maximal performance in one.
If I had the time, money and space to buy a new 'dedicated'
MUni, it would be a 24 inch wheel with a 3 inch section
tyre. This would give it a rolling diameter of about 26
inches, good enough for most surfaces, but small enough for
low gearing. I would fit 150mm cranks, decent pinned pedals,
and a good strong handle on the seat.
I would value plenty of mud clearance on the frame.
I would accept that this MUni would have some limitations,
but all unis are a compromise of some sort.
I have never had a uni with a splined hub, and so far I have
never broken a hub or crank. But I roll the wheel and seldom
hop or drop.
--
Mikefule - Roland Hope School of Unicycling
Sometimes I ride like a demon, sometimes like a lemon. It's an L of a
difference.
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