Need help finding dimensions of a hub please.
11-11-15, 05:11 AM
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Need help finding dimensions of a hub please.
I was wondering if anybody out there would know or know where to find the dimensions of a novatec nt-256sbt 36H rear hub for finding the spoke length?
11-11-15, 05:36 AM
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Bdop cycling sells them, and Bob's a helpful guy. He might know.
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11-11-15, 06:43 PM
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Harbor Freight periodically puts their digital inch/metric callipers on sale for about $10.
11-11-15, 06:46 PM
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Ya I found that link my hub is the older version of that one i'm not sure if the measurements are going to be the same.
That one in the link is D256SBT and mine is NT-256SBT.
11-11-15, 09:33 PM
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Do you have the hub? https://www.wheelpro.co.uk/spokecalc/hubmeasure.pdf
I have a digital caliper, but one doesn't need such a precise one to measure a hub; I have a plastic model I bought for 99 cents that measures a hub precisely enough to calculate for spokes. Nor does one even need calipers: poke a couple of straight spokes through spoke holes on both sides halfway around from each other and measure the distance between them with a ruler perched on the axle: that'll get it close enough.
I have a digital caliper, but one doesn't need such a precise one to measure a hub; I have a plastic model I bought for 99 cents that measures a hub precisely enough to calculate for spokes. Nor does one even need calipers: poke a couple of straight spokes through spoke holes on both sides halfway around from each other and measure the distance between them with a ruler perched on the axle: that'll get it close enough.
Last edited by RandomTroll; 11-11-15 at 10:59 PM.
11-11-15, 11:14 PM
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Do you have the hub? https://www.wheelpro.co.uk/spokecalc/hubmeasure.pdf
I have a digital caliper, but one doesn't need such a precise one to measure a hub; I have a plastic model I bought for 99 cents that measures a hub precisely enough to calculate for spokes. Nor does one even need calipers: poke a couple of straight spokes through spoke holes on both sides halfway around from each other and measure the distance between them with a ruler perched on the axle: that'll get it close enough.
I have a digital caliper, but one doesn't need such a precise one to measure a hub; I have a plastic model I bought for 99 cents that measures a hub precisely enough to calculate for spokes. Nor does one even need calipers: poke a couple of straight spokes through spoke holes on both sides halfway around from each other and measure the distance between them with a ruler perched on the axle: that'll get it close enough.
If both flanges are the same size, then for measuring the spoke holes, you could try putting the spokes through the holes and measuring the distance between the spokes.
One of the problems is that the spokes are staggered. So, you either choose holes that send the spokes in opposite directions, or choose holes so that they are 1 hole closer on one side, and coming out at the same angle on the opposite side.
For my 28h hub, I think both methods came up about 1/32" long. Divide that by two, and your spokes would be about 1/64" long, which is pretty tight tolerances, but you could subtract it out anyway.
11-12-15, 07:07 AM
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When you refer to "my hub" it sounds like you have it in your possession, so just measure. Unless you're spoking radial the angle of the spokes means that the flange diameter measurement is not critical. The distance between flanges is likewise not that big an influence. It's fine to be within 1mm. ANY calipers can give you a sufficiently accurate measurement, and even a ruler is good enough.
11-12-15, 02:19 PM
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I don't actually have the hub in my hands yet. I'm just going to wait till i do and then measure it myself. Then I know if anything is wrong I can only blame myself.
