I ordered a standard uni hub. Having had a Schlumpf bottom bracket on my fixie bike, I know it will handle road uni use. But anyone thinking of off-road should seriously consider the ISIS version.
As for spokes, straight 14 guage is fine. On the 36", I have some “standard” 376mm spokes (made for 4-cross on a low flange hub), but cut & re-thread them for 3-cross lacing on the high-flange hubs like mine and Florian’s.
There are several good spoke length calculators available online; some can handle any size wheel. Maybe JC can post the links.
Since this is a exotic hub, any opinions on using spoke washers to protect the hub?
The idea here is that these hubs are likely to be re-built on several different wheels in their lifetime, so washers would help prevent deformation of the hub spoke flange to a particular wheel build.
Wow, what a technicality, but worth some discussion. My own opinion from building wheels is that if the flange hole is 2.2mm or so, a 14g spoke (2.0mm) will sit tight in the flange. If the holes are 2.3 or 2.4, a spoke head washer will help spread the load, but ultimately will not prevent oblongation of the flange hole due to spoke tension. Whether the hole will deform depends on the strength of the hub material, not the size of the hole.
Saw this thread again, and forgot to mention before that the spoke length for a Schlumpf hub and 36" Airfoil rim, using 3 cross pattern, is 355mm. A 4-cross pattern should use 375mm.
My understanding is that the UDC aftermarket 14g spokes only come in 376. I cut my own spokes to 355, and have them threaded at a local shop using the Phil Wood machine, which takes a full 1 second to roll threads onto the spoke!
I do not know the flange diameter of the KH/Schlumpf, but we will need to know that to calculate the spoke lengths for various rims.
I’m sure Florian and Kris understand this, but I want to emphasize that Ride The Lobster is the single biggest sales opportunity for this hub; they could sell 30+ units to people doing RTL. (I know my team is planning to purchase at least two). If they’re not shipping by March or so, teams are going to have to come up with alternative plans; it’s probably not feasible or advisable to train on a short-crank Coker and then switch to a geared uni just before the race.
gerne sende ich Euch brandheisse News aus dem Hause Schlumpf:
Wir haben soeben die erste Serie MUNI-Naben fertiggestellt, die in Zusammenarbeit mit Kris Holm (http://www.krisholm.com) entwickelt wurden.
Hier die Spezifikationen:
zwei Gänge 1:1 und 1:1.5 (Schnellgang)
Damit ist ein 26”-Rad gleich schnell wie ein 39er!
ISIS Achse
extra steife Auslegung dank zwei Paar Rillenkugellager als Achslagerung
gehärtete Schaltknöpfe, die für rauhen Einsatz ausgelegt sind
Schaltwelle mit rund dem doppeltem Durchmesser verglichen mit der Standardausführung
extra breite Nabe mit 70mm Abstand von Flansch zu Flansch
ausgelegt für vertikale Sprünge bis 1.5m
kompatibel mit allen KrisHolm-Rahmen ab Baujahr 2007
This is very expensive of course, in a kind of “absolute” world - however I understand why it can be that expensive, if one considers the low volume market we are in and the high level of manufacturing quality involved.
I will probably buy one of them and build a killer 36er - I’m just basically waiting for the “Big News” to come…
UDC may not hold them as stock due to the high cost so I’d give them a call to see if they’re expecting spare(s), otherwise order them directly. Logically it would be quicker direct, but UDC would be better if you want them to build the wheel for you.
