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Or wanna talk me out of it?

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Joined

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210 Posts

Or wanna talk me out of it?

I've got all the info on paired lacing and how to do the spoke calculations here. The 24" wheel I built with 16 ti spokes ended up weighing 595g.

One other interesting lacing pattern that works well for 32 spoke hubs/rims is to lace them with 24 spokes in a crows-foot pattern, each side has 4 clusters of three spokes, two crossed and one radial with every 4th rim/hub hole empty.

Another possibility for the rear is to use all 16 spokes crossed on the drive side, counter-balanced by 8 radial spokes on the non-drive side for a total of 24 spokes. It is probably overkill but builds a fairly strong wheel with the tension fairly equal between both sides since each NDS spoke gets tensioned twice as much as usual for the NDS.

As GrayJay says, radial lacing for non disk wheels is good too, but you need to make sure that the hub flanges can take the strain. In a 2x or higher wheel, spoke pull across the circumference of the hub flange, when radial laced the pull directly away from the hub. With hubs not meant for radial lacing, this can lead to the flange breaking or the hub stretching and bearings becoming sloppy. Your average kid's bike front hub will probably be of fairly low quality, so exercise a fair degree of caution when doing any lacing pattern that involves a radial component (eg. this includes crows-foot).

Crows-foot is a cool pattern as well, but there are a couple of small gotchas. Firstly, you may need up to 4 different length spokes because for each side you have both a radial (shorter) spoke and the crossed (longer spokes). For a disc wheel, each side will probably require different lengths spokes, so you're faced with ordering 4 lengths. Secondly, there's the radial spoking/hub flange issue.

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I figured out that the Rim ERD is 389mm.

Hubs are front and rear disc Shimano M525's

It looks like with a 3 cross pattern if found the Rear NDS would take 187mm and DS 185mm.

The Front would take NDS 185mm and DS 187mm

So how do I convert that to the 16 spoke pattern?

For each hub you need to measure (or lookup) the width from center to left flange and right flange, and the left and right flange diameters at the spoke holes. Put this data into spocalc with 16 for the total number of spokes and either 1.25 for a 1x pattern or 2.25 for a 2x pattern. Note, 1.25x for 16 spokes gives you about the same spoke angles as 2x for 32 spokes. The fewer spokes you have, the lower the cross number you can get away with. Either 1.25x or 2.25x should work for you, but if the hub flanges are large and the rim ERD small then 1.25x may be the only workable option.

When lacing the wheel, make sure the "paired" spokes start at adjacent holes in a flange and go away from each other (see my close up pics).

I also like the idea of using 36 spoke hubs/rims laced as a 12 spoke kids wheel. I did my 12 spoke as a radial front rim brake wheel but it might also work to 1X the spokes into three pairs per side, I just have not checked to make sure that the spoke/rim angle is not excessively acute. When I did my radial 24" wheel, I lucked out and found that the spokes from a 20" (406mm BSD) 3X wheel were the perfect length for radial lacing with a 24" rim, saved having to order short spokes.

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