Thinking 29"

A 28 or 29 is in fact a 700c rim with a different tyre on it. Very
roughly, a 700c rim will produce a 700mm (28 inch) wheel with a normal
road section tyre on it. Fit a bigger tyre and you get a 29 inch
rolling diameter, but it is only roughly 29 inches. Bear in mind that
700c is a metric size, whereas terms like 28er or 29er are "Imperial"😉

A bigger second number (e.g. x 2.3 or x 2.6) will produce a slightly
biggger rolling diameter - IF you pump the tyre up hard. For many
people, the advantage of a fat tyre is that you can run it at lower
pressure to aid grip, comfort and control.

You'll need someone who's tried it to confirm which tyre will fit which
frame. However, there's no obvious reason not to get the longest forks
you can, as it son't alter the seat to hub distance. In a logical
world, we'd each own one Coker- sized frame and swap wheelsets.

Is catching your knees really a problem, or an imaginary one? Surely in
normal riding, even in quite difficult circumstances, good technique
should prevent this.

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Like Mike says all 29-ers are based on 700c rims. So a 29-er is the same
as a 28"-er, just with a much thicker tyre.

But that thicker tyre makes a world of difference, much like fat tyres
on munis do, in terms of comfort and ease of rolling over obstacles.

My 29-er tyre is towards the small end, being a Notos 2.1", and it just
fits in a round top Nimbus 28" frame.

If I was doing it again I'd go for the new 29" Nimbus frame and probably
the bigger of the Big Apples.

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I didn't realize there was a 29 inch Nimbus frame. Where did you see
it?

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Thanks, but what is the difference between a Big Apple and a 29"-er
tire/tyre. The Big Apple says 28x2.5?

Rusty, Norway

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rusty said:

*Thanks, but what is the difference between a Big Apple and a 29"-er
tire/tyre. The Big Apple says 28x2.5?
*

nada in diameter but mucho in air volume!

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Rusty,

I changed my 28", which had a 700 * 35 (or smaller) metric tyre into a
'29er' by fitting the 28 * 2.35 Big Apple. The frame, rim etc remained
the same (although I had to shim the frame to get the tyre to fit).

The difference between a skinny tyred 28" (extremely twitchy and feels
every bump) and a '29er' (much less twitchy, more relaxing to ride, less
discomfort if you hit a bump) is huge.

The 28/2.35 is a big tyre, and although the manufacturer calls it a 28"
unicyclists, atleast, refer to it as as 29".

e.g. http://tinyurl.com/sb31

Keith

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But don't knock the very special feeling that comes from riding a 28
with a skinny, high pressure tyre and short cranks. It is a very pure
form of unicycling. Not for everyone, and not for every occasion, but
everyone should give it a go.

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rusty said:

*Thanks, but what is the difference between a Big Apple and a 29"-er
tire/tyre. The Big Apple says 28x2.5?

Rusty, Norway *

In a way the entire concept of 29-er is potentially quite confusing.

All these 29-er tyres fit the same rim that 28" tyres go on (ie 700 c
rim).

So 29-er tyres like the Big Apple are actually just very fat versions of
the standard 700 c tyre, which are often labeled as 28" tyres.

Compare this with the fat tyres used on munis (24 x 3 i.e. a 3" wide
tyre on a 24" rim).

As many here have observed, a set up like that actually has a physical
diameter equal to a normal tyre and 26" rim combination.

Yet the 24 x 3 is not called a 26-er, whereas a 700 c with a fat tyre is
referred to by it's physical size of 29". It's an inconsistency, and, as
we're seeing here, it can cause confusion.

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daino149 said:

*I didn't realize there was a 29 inch Nimbus frame. Where did you see
it? *

It's here on unicycle.uk.com: -

http://tinyurl.com/5kkon

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rusty said:

Thanks, but what is the difference between a Big Apple and a 29"-er
tire/tyre. The Big Apple says 28x2.5?

Firstly, is there a Big Apple 2.5 now? When I bought mine in spring
2003, the BA's came in 2.00" and 2.35".

Secondly, that the Big Apple is called 28 is probably because it fits
a normal 28" rim. Like others have said, the nomenclature of tyre and
wheel sizes is quite confusing. But once you have fitted the BA 28 x
2.35 on your uni, it surely is to be regarded as a 29'er.

Klaas Bil - Newsgroup Addict
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Thanks!

I just had a little problems with the labels some was called 28" and
other 29"

Rusty, Norway

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