I’m trying to determine which spokes to order for a KH 24 rim and a Schlumpf.
First, I assumed a 3 cross pattern, because I thought that was normally used.
It’s implied in the Schlumpf manual: “Some approximate lengths (for triple crossing)”
Though on the UDC spoke page it says “We recommend 4 cross pattern for 20 and 24 inch wheels, 3 cross for 26 and 28 inch wheels”
Triple cross IS the way to go for a 24" Schlumpf muni wheel… right?
And don’t KH24 unicycles come with a triple cross wheel?
Triple cross is also implied by all the suggested spoke sizes, being close to 230mm. (online calculator shows 4 cross being more like 245mm)
Varying sources show different lengths, but these forums and KH’s site suggest 227mm. So I’d go with that unless someone can change my mind.
Since the hub has such large flanges I would go with either 3x or even 2x so the angle of the spoke going to the rim is not so severe. I would not bother getting spokes from UDC and just let the bike shop use their own spokes. They will choose the right length and it will probably be cheeper.
3-cross 227mm worked perfectly for me.
Your LBS may be cheaper for the spokes but tell them the correct length to use - they won’t have a clue about the Schlumpf hub dimensions (and probably the KHU 24" rim too) as it won’t be on their bike wheel calculators.
The best calculator for unicycle wheel sizes on the internet is on Unicycle.com UK.
there is a way to calculate spoke length for any hub on a spoke calculator. You need to know some dimensions though. I know you need to know the exact rim size, exact distance between spoke hole, distance between flanges and another thing or 2. I just took a course at a local bike shop on wheel building. This probably doesn’t help much but you could easily figure it out if you had schlumpf dimensions using a googled site
I used the pre-2009 rim and I would pick 228mm spokes.
However there was a significant price difference I would go for 226mm with longer nipples: standard is 12mm but 14 and 16mm are also available.
It really doesn’t matter that much, I’ve spent hours pondering the same dilemma and gone with what I thought wouldn’t work well as they were too short. Once built it’s easier (and cheaper) to switch in longer nipples than replace spokes that are too long.