Proper Spoke Length
01-24-06 | 03:29 PM
#1
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Joined: Sep 2005
Posts: 26
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Proper Spoke Length
I've ordered the Sun CR-18 700c rims and Shimano Deore M510 36h front and rear hubs from 2004. A link through Sheldon Brown's website let me determine the proper spoke length for the front hub (297.7 left, 298.4 right) but there's no info on the rear M510. I searched the Shimano website but their "technical" docs don't go into that much detail. Does anyone know the proper specs on the M510 to get me the correct spoke length for building the rear wheel? Should I assume the rear hub has the same measurements (flange diameter, center to flange distance) for both sides as the front hub? This is my first build, so I'm learning as I go. Thanks for your help.
01-24-06 | 03:36 PM
#2
There are lots of spoke-lengh calculators out there, basically all giving the same information, and you should be able to find the Deore hub in one of them. If not, my guess is that flange placement is probably the same for Alivio and LX (the groups just below and above Deore, respectively) and you could extrapolate from those hubs.
But I'm worried that you're already on the wrong track here. For a front hub that's symmetrical, which they basically all are (and I've looked up the Deore model that you have, and it appears symmetrical), your spokes should be the same left and right. Just how did you get different spokelengths for left and right side spokes for the front wheel?
But I'm worried that you're already on the wrong track here. For a front hub that's symmetrical, which they basically all are (and I've looked up the Deore model that you have, and it appears symmetrical), your spokes should be the same left and right. Just how did you get different spokelengths for left and right side spokes for the front wheel?
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"c" is not a unit that measures tire width
"c" is not a unit that measures tire width
01-24-06 | 04:34 PM
#3
Easy like Sunday morning
Joined: Apr 2005
Posts: 296
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From: Santa Fe, NM
Tim's right. The M510 is symmetrical. I'm coming up with 296.7mm on both sides if you do 3-cross.
The M510 is also almost identical to every other modern non-disc Shimano hub. It's got a 45mm flange, so using an XT or LX hub as a model will get you close enough.
The M510 is also almost identical to every other modern non-disc Shimano hub. It's got a 45mm flange, so using an XT or LX hub as a model will get you close enough.
01-25-06 | 08:05 AM
#5
An inexpensive dial caliper from your nearest big box home improvement store is invaluable for bike maintenance. With it, you can easily measure the flange diameter and width as well as any flange offset. Guessing that one hub is similar to another model may, or may not, be close enough. Measuring the hub will tell you for sure before you buy a bunch of wrong sized spokes.
