700cc questions

After reading 'this thread' (http://tinyurl.com/a34gr) about how a 700cc
(with 65mm cranks) won the unlimited race, I have gained a lot of
interest in the wheel size.


Can this wheel fit into a Nimbus frame (designed for a 24 - 26"
wheel)?
If the rider that won rode a Coker, would he have won by more time?
Was Gizmoduck competing in this particular race?
What are the components of the wheel that won (rim, spokes, crank, hub
tire)?
What was the average speed of the winning rider?

I am interested in riding somewhat short distances (24 miles) at fast
paces (12-14mph). I'd like to be able to keep up with the LOCAL Coker
riders. They are not rockets or 600 mile riders like the superduper guys
on this forum. The above speed and distance will be fine.

Ideally, I would love to simply change the wheel on my current setup,
change the setting on the cyclometer, and "go" ride 10 miles in 45
minutes (13.3 mph).

I'm thinking that a 700cc will offer a wide range of tires, durability,
cheap cost, compact size, ultra-light weight and unique handling that
won't be so "Coker-like."

And, perhaps I never "eat Cokers" like the winner of the race, but if I
holding 12-14 mph would meet my needs.

Any insight?


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ChangingLINKS.com wrote:
*
Perhaps I will never "eat Cokers" like the winner of the race, but if
I can hold 12-14 mph for 20 miles, it would meet my desires.

Any insight? *


Well, I'm 42 now, so a bit past my prime, but I keep fit, and only weigh
10 pounds more than I did at 21...

A couple of years back, I trained hard about 3-4 times a week on a Coker
with 150s, and rode against the clock for an hour at a time. The best I
ever managed was a distance of 12.95 miles in an hour. That was
training hard, and taking it very seriously, and with a background in
bicycling big distances.

On flat out 2 hour rides (that's 2 hours with no dismounts at all) I
managed just over 22 miles once, and over 20 miles a couple of times.
That's an average of 11 mph.

OK, so I'm no Lance Armstrong, but as a fit, experienced and determined
rider, I was busting a gut to hit these figures, with lots of serious
training.

12-14 mph for 20 miles on a unicycle would be very impressive - elite
stuff. Not impossible, but beyond any but the most committed, talented,
and determined. Good luck.

As for matching that on a 28/29 - do the maths and see the cadence you'd
have to maintain. A big wheel will always be faster than a smaller one
over a distance, other things being equal.


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The 700c beat the Cokers on a 10km unlimited race. In this case, the
smaller wheel won. Seems to me that 10km is a pretty long distance.
Enough distance to give the Coker time to "sprint."

The local guys pull an AVERAGE of 10mph. Duane told me that is their
basic "crusing around" speed. I'm pretty sure AJ said he held 11mph
average for the MS 150. Seems like your speeds are a bit slow (compared
to those that don't train as hard as you did).


The 700c wheel size is appealing to me. I'm curious to get the answers
to the questions I listed above.

For one thing, imagine if Gizmoduck was participating in the race - we
all know he holds a world record, trains hard, isn't "too old," and is
probably one of the top 10 Coker riders of all time. If HE was outrun by
a 700c it's more "proof" that . . . well, a 700c wheel can win that
race, and keep up with a Coker.

I don't think that many people ride a 700c. Well, not on this forum. I
just don't see a bunch of people beating on their chests about (like the
other wheel sizes).

I like riding distances on the road that are 24 miles (and less) for
various reasons. If I got a similar setup to the one that won the
unlimited race, could I
a. keep up with Cokers for 20 miles (not 12mph average or less).
b. integrate the 700c wheel into my current setup


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I see on unicycle.com, that they sell a

"Semcycle XL 700c (28- or 29-inch) with Kovachi Wheel"

Is there no difference between a 700c and 28"?
The reason I ask is because Foss implied a difference in the thread that
I linked to above.

Is it possible to buy a KH29 and then occassionally replace the wheel
with the "racing 700c"?


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ChangingLINKS.com wrote:
*Is there no difference between a 700c and 28"?
*


It is the same rim diameter whether it is called 700c, 28" or 29" namely
622 mm


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the kh 29 rim is quite wide (38mm according to 'unicycle.com'
(http://www.unicycle.com/shopping/shopexd.asp?id=805) ) A normal slick
700c racing tyre might not fill that sort of width very well, even
though the rim is the same diameter.



jim


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goldenchicken II wrote:
*It is the same rim diameter whether it is called 700c, 28" or 29"
namely 622 mm *


yes - i think. 700c refers the rim. 28" and 29 inch refers to the
tires.


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ChangingLINKS.com wrote:
*Seems to me that 10km is a pretty long distance. Enough distance to
give the Coker time to "sprint."
*


10 km roughly equals 5.9 miles = less than half an hour at the speeds
we're talking about.

ChangingLINKS.com wrote:
*Seems like your speeds are a bit slow (compared to those that don't
train as hard as you did).*


Ouch!

ChangingLINKS.com wrote:
*I don't think that many people ride a 700c. Well, not on this forum.
*


They do - they just call them 28s or 29s, depending on the tyre size. I
have a Coker and a 28 (and other unis) and have ridden fair distances on
both, on and off road. I've also done speed comparisons on a variety of
wheel sizes and crank sizes. It's a long time ago, now, but the gist of
the results was that, given approximately equal crank:wheel ratios, the
larger wheel will generally be faster over a distance. Within
"reasonable limits" (a deliberately subjective term) the smaller
crank:wheel ratio will generate a higher top speed - but ultimately, the
reduced control lowers journey speeds.

Consensus in this forum seems to be that 29s are faster than 28s because
of the rolling momentum that helps to iron out minor bumps etc.

What happens when a specialist trains on a specific set up over a long
period of time may be a different thing.


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On my training these past months on a 28.5 tire (700c rim) with 150mm
cranks in hilly terrain I typically average 10.3 km/hour. I'm not
racing, nor do I try to ride fast, it's just that after a while you've
got places to go. When riding with other people I ride faster. I have
the cyclometer on auto so it shuts off after a bit during breaks. My
max seemed to be about 14.2 kph or so. It would seem quite reasonable
to shorten the cranks quite a bit for flatter terrain and bump up my
average (after practice) to 10 mph or more. For a young, fit, handsome
guy like you, I'm sure that 12mph wouldn't be unreasonable.

John Stone, in his 30s, regularly rides his 29er at about twice my
speed, using 110s, I believe.


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I'm starting to "get a clue" about this 700c thing.

I talked to unicycle.com and they have a smaller NAUCC wheel that will
fit in my current frame. Not sure what the exact rim size is (the guy
guessed 26").

Perhaps I could get the smaller wheel, and then use the 65mm cranks.

I'm guessing it would be "best" to get a KH 29" and then buy the extra
700c wheel for road racing. (Looking for utility here). That way the new
frame could double for cross-country.

I could just stick with the setup that I have. I'm not a good rider. The
setup that I have is the most "useful" for me. I have to admit that
sometimes I wish I could go a little farther and faster with the effort
that I put out.


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