hubs!

does anyone know of a hub that is square tapered that is stronger than a
suzue?
and what would the height of a drop be with a suzue hub and unbreakable
cranks on a 24" with someone 10 stone with a roll out after?
thanks


--
pluto
------------------------------------------------------------------------
pluto's Profile: http://www.unicyclist.com/profile/3986
View this thread: http://www.unicyclist.com/thread/27372

there is a custom hub out there, i think it's made by Steve Howard that
is stronger than the Suzue.

My first Uni had a suzue hub and some Kooka cranks (very strong) and
about 3 months after learning to ride i tried a 6 ft drop off a
dumpster, and snapped the axle.

I'd say with good technique the most you'd be able to get away with is
3.5 feet (repeated)

I d'ont think a suzue would break after just one big drop, but it's the
repeated pounding that eventually will cause it to fail.

If you are really concerned, and plan on doing 4+ foot drops,
consistantly, then buy the profiles, or Onza, or KH hub. Splined is
definately the way to go.

-Ryan


--
m_extreme_uni

I must only use these powers to annoy!!!
------------------------------------------------------------------------
m_extreme_uni's Profile: http://www.unicyclist.com/profile/809
View this thread: http://www.unicyclist.com/thread/27372

thanks any other view?
why is it there isn't any other strong square tapered hubs available?
splined are only 20% stronger and stiffer than sq so why do they seem to
be so much stronger?????
aaron


--
pluto
------------------------------------------------------------------------
pluto's Profile: http://www.unicyclist.com/profile/3986
View this thread: http://www.unicyclist.com/thread/27372

pluto wrote:
*splined are only 20% stronger and stiffer than sq so why do they seem
to be so much stronger????? *
I don't know where you get the 20% figure. Is it a 20% thicker axle?
That's not the whole story. The square taper design is simply inferior
for unicycles. We put way more stress on the hub/crank interface than
bicycling, so we need something stronger. So no matter what you find in
a square taper, it will probably never be able to match a splined axle,
even if equal axle diameter.

Note: Jump heights are also a very rough way to measure an axle's
strength. There are many varying factors, the most important of which is
rider technique. Plus, steel axles don't (usually) break from a few hard
impacts. The metal fatigues, as a cumulative effect of all the cranking,
braking, hopping, and drops you do. A heavier rider with better
technique will be able to use the same axle longer than a much lighter
rider with poor technique, and so forth.

So that 20% figure I don't think has anything to do with the relative
longevity of square taper vs. splined axles on unicycles. I'd say it's
probably closer to 100%, though there are too many factors to really
give out a number. Profiles are probably stronger than DMs, which are
probably stronger than the less expensive KHs, etc.

For heavy pounding, get splined. Any splined.


--
johnfoss - Now riding to work

John Foss
the Uni-Cyclone
www.unicycling.com
________________

"Where's my kids?" -- Amy Drummond
"Where's my unicycle?" -- Andy Cotter
spoken one right after the other, mostly to themselves, at NAUCC 2003

------------------------------------------------------------------------
johnfoss's Profile: http://www.unicyclist.com/profile/832
View this thread: http://www.unicyclist.com/thread/27372

I've made four square taper hubs. As far as I know all four are still
unbroken.

Harper has one of them. When he stopped by on the way to NAUCC I was
happy to see that the axle was still going strong even though the
aluminum cranks were trashed. Anyone who's seen Harper ride knows that
he's fearless and will try about anything ... he's not easy on
equipment.

Paco has another one. From reading his posts it sounds like his hub is
getting a good workout along with the rest of the MUni.

Maybe these hubs I've made are stronger than a Suzue ...

But just to echo what John already said, there's major problems with
using square taper axles on unicycles. The axle size doesn't really
matter on a square taper axle because the weak part is just inboard of
the cranks where the square part of the axle comes out of the crank. No
matter what size the axle is, that square part will always be the
same.

A splined axle will be stronger because the cross sectional area of the
axle where is leaves the crank arm is larger than a square taper. In
theory a Profile axle will be stronger than a DM or KH because the
spline depth is shallow on a Profile, leaving a larger "root diameter" -
thus more material.

Also, the strength of an axle increases roughly to the power of three as
the diameter increases. The result is that a little bigger diameter
makes a large increase in strength. That's why the larger root diameter
of the Profile axle makes it the strongest even though the "axle
diameter" of all the splined axles is the same. But Profiles aren't
without their faults too.

I don't think the best unicycle axle has been designed and built yet. I
know that a very light and strong axle could be made but the problem is
that it wouldn't work with any frame or crank arm that's available now.
Everything would have to be totally custom and very expensive.

Steve Howard


--
showard - ------
------------------------------------------------------------------------
showard's Profile: http://www.unicyclist.com/profile/452
View this thread: http://www.unicyclist.com/thread/27372

I found information on this hub at Muniac.com. It sounds like it's a
tough hub. But, I don't know if you can buy it or how much it might
cost.

Here is the link.

http://tinyurl.com/866f


--
scottw
------------------------------------------------------------------------
scottw's Profile: http://www.unicyclist.com/profile/777
View this thread: http://www.unicyclist.com/thread/27372

showard wrote:
*
A splined axle will be stronger because the cross sectional area of
the axle where is leaves the crank arm is larger than a square taper.
In theory a Profile axle will be stronger than a DM or KH because the
spline depth is shallow on a Profile, leaving a larger "root diameter"
- thus more material.

Also, the strength of an axle increases roughly to the power of three
as the diameter increases. The result is that a little bigger diameter
makes a large increase in strength. That's why the larger root
diameter of the Profile axle makes it the strongest even though the
"axle diameter" of all the splined axles is the same. But Profiles
aren't without their faults too.
*

I believe that the KH hub is a little bit larger diameter than the
Profile hub. The Profile hub uses bearings with a 19mm ID while the KH
hub uses bearings with a 20mm ID. The Profile will still have a larger
root diameter though because the Profile splines are so shallow.


--
john_childs - Guinness Mojo

john_childs (at) hotmail (dot) com
------------------------------------------------------------------------
john_childs's Profile: http://www.unicyclist.com/profile/449
View this thread: http://www.unicyclist.com/thread/27372

tomblackwood wrote:
*
This from that same thread referenced above:

Like the chef, I don't give out my recipes. *[/i]


sureley though if all the chefs colaborated they could create a better
recipie, than any one chef could produce alone.


--
evilewan - death or glory

--
evilewan.

see the rec.sport.unicycling maintainance FAQ @
http://evilewan.unicyclist.com/
------------------------------------------------------------------------
evilewan's Profile: http://www.unicyclist.com/profile/1047
View this thread: http://www.unicyclist.com/thread/27372

S_Wallis wrote:
*
But whose name would be on the restaurant? *


I'd rather be a nameless co-owner of McDonalds than the sole owner of
one local restaurant


--
Sofa - My Custom Beard

'London Unicycling Club' (http://londonunicyclingclub.ca)
------------------------------------------------------------------------
Sofa's Profile: http://www.unicyclist.com/profile/706
View this thread: http://www.unicyclist.com/thread/27372

Sofa wrote:
*

I'd rather be a nameless co-owner of McDonalds than the sole owner of
one local restaurant *
McDonald's is the result of a colaboration of the finest chefs?


--
S_Wallis - MUni motivated

"I am always doing that which I can not do,
in order that I may learn how to do it."
Pablo Picasso
------------------------------------------------------------------------
S_Wallis's Profile: http://www.unicyclist.com/profile/1520
View this thread: http://www.unicyclist.com/thread/27372