Isis drive

Industry standard for the specs of the splines on the hub and cranks. In
theroy It would allow you to be able to put any ISIS cranks on any ISIS
hub.

--
agentQ

*)--SmallSpin-'O,*
'Uneed Films' (http://www.uneedfilms.com)
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its a type of splined. I dont know why people think they are so great
but I like mine. ISIS splineds have a bigger axle for the crank to fit
onto, and they only have 10 splined, compared to like 36...

--
isaac steiner

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well thats what im pretty sure they are. 🙂

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isaac steiner

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Any splined interface--ISIS is just the most common in the cycling
world--between the crank arms and the hub will result in a more solid
interface between those two components. Splines make the hub look like
it has teeth in it--like a gear (see picture below)--so it reduces the
chance of the crank unexpectedly rotating on the hub.
[image:
http://www.unicycle.com/images/catalog/hardware/axlehubs/tn_Hub_UK_6304.jpg]

A traditional hub has a square interface between crank and hub, and
because there are fewer sides (just four; see picture below) that
intersect, it's more prone to being torqued and deformed.
[image:
http://www.unicycle.com/images/catalog/hardware/axlehubs/schwinn36holecotterless.jpg]

That said, it's really only in more extreme circumstances that the
splined interface is a necessity--trials, street, and muni, mostly.
Square taper hubs are generally fine for freestyle, road, distance,
etc.

--
pkittle

*==========================
Peter Kittle * Chico, CA
"The Revolution is just a t-shirt away."
--Billy Bragg
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pkittle explained the difference between splined and traditional
cotterless. The reason we favor the ISIS standard is because it's a
*standard* (assuming people adhere to it). Before unicycle makers
started using ISIS, we had incompatible hubs & cranks for DM, Profile,
KH, Qu-Ax and others. One or more of those may have fit each other; I'm
not sure. Now you can buy a pair of cranks and have it fit more than
one of your unicycles.

--
johnfoss

John Foss
Email: "jfoss" at "unicycling.com" -- www.unicycling.com
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"pretty much every trail that we've done on the California or Moab Muni
weekends is an XC trail." -- Kris Holm, on XC from a North Shore point
of view
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