As experienced 50-plussers, does spoke length matter?
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The ongoing saga. I rechecked with Bontrager and they flatly state that the front and rears are the same length -263mm, non-disc side and 261mm, disc side- yet I absolutely, dead certain measure a front at 292mm plus or minus. So, either my ruler is nuts or Bontrager is. I clarified with them that I have a 700c wheel. So... do I believe them and order 261mm and 262mm or do I believe my ruler and my eyes and order 292's? This is pretty insane
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The ongoing saga. I rechecked with Bontrager and they flatly state that the front and rears are the same length -263mm, non-disc side and 261mm, disc side- yet I absolutely, dead certain measure a front at 292mm plus or minus. So, either my ruler is nuts or Bontrager is. I clarified with them that I have a 700c wheel. So... do I believe them and order 261mm and 262mm or do I believe my ruler and my eyes and order 292's? This is pretty insane
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But, for some reason, I just can't shake the desire to take a whack at it myself.
Then, if I can't get anyone to give me accurate, consistent lengths and I don't really have to tools to measure the hub so I can calculate it myself, maybe I *am* nuts for even thinking about it.
I do know the rim has an ERD of 604mm. It says so right on the rim
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You know the ERD of your rim.
Measure the diameter of the hub (to the spoke holes).
Measure the the positions of the flanges/lock nuts such that you know how far from center the flanges are.
Know how many spokes you're going to use, and in what pattern.
Now Google "spoke length calculator" and be done.
Anyone telling you what you need without all of the above information is guessing. (maybe well, maybe not) There's no need to guess; it's just simple measurements and some trig, and the trig exists as code online.
As for not having the right tools, your best guess with a tape measure will be fine. But I would reccommend a proper truing stand for actually building the wheels.
Measure the diameter of the hub (to the spoke holes).
Measure the the positions of the flanges/lock nuts such that you know how far from center the flanges are.
Know how many spokes you're going to use, and in what pattern.
Now Google "spoke length calculator" and be done.
Anyone telling you what you need without all of the above information is guessing. (maybe well, maybe not) There's no need to guess; it's just simple measurements and some trig, and the trig exists as code online.
As for not having the right tools, your best guess with a tape measure will be fine. But I would reccommend a proper truing stand for actually building the wheels.
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You know the ERD of your rim.
Measure the diameter of the hub (to the spoke holes).
Measure the the positions of the flanges/lock nuts such that you know how far from center the flanges are.
Know how many spokes you're going to use, and in what pattern.
Now Google "spoke length calculator" and be done.
Anyone telling you what you need without all of the above information is guessing. (maybe well, maybe not) There's no need to guess; it's just simple measurements and some trig, and the trig exists as code online.
As for not having the right tools, your best guess with a tape measure will be fine. But I would reccommend a proper truing stand for actually building the wheels.
Measure the diameter of the hub (to the spoke holes).
Measure the the positions of the flanges/lock nuts such that you know how far from center the flanges are.
Know how many spokes you're going to use, and in what pattern.
Now Google "spoke length calculator" and be done.
Anyone telling you what you need without all of the above information is guessing. (maybe well, maybe not) There's no need to guess; it's just simple measurements and some trig, and the trig exists as code online.
As for not having the right tools, your best guess with a tape measure will be fine. But I would reccommend a proper truing stand for actually building the wheels.
Why would you think I haven't already "Googled spoke length calculator"? More than once.
I've looked at Sheldon Brown's site on the subject as well.
I don't know about your tape measure but mine measures in inches.
Every calculator I've found online -and there are a LOT of 'em, from ridiculously simple to hideously complex- works in mm. Sure I could convert inches to mm but why add an unnecessary degree of uncertainty?
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Why would you think I haven't already "Googled spoke length calculator"? More than once.
I've looked at Sheldon Brown's site on the subject as well.
I don't know about your tape measure but mine measures in inches.
Every calculator I've found online -and there are a LOT of 'em, from ridiculously simple to hideously complex- works in mm. Sure I could convert inches to mm but why add an unnecessary degree of uncertainty?
I've looked at Sheldon Brown's site on the subject as well.
I don't know about your tape measure but mine measures in inches.
Every calculator I've found online -and there are a LOT of 'em, from ridiculously simple to hideously complex- works in mm. Sure I could convert inches to mm but why add an unnecessary degree of uncertainty?
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SKT, I suspect that your rims are Bontrager Select Disc. If the model of hub is written on the hub somewhere then I have a spreadsheet that will give me the data. For example if the rim is "Bontrager select" then ERD is 604.1..........If the hub is "Bontrager select disc" then the flange diameter is 58mm, the left flange is 34.4 from centerline and the right flange is 20.4 from centerline. For this example only, the spokes would be 293 left and 289 right.
We already know the rim erd but I need to know what hub is in play here to be certain.
We already know the rim erd but I need to know what hub is in play here to be certain.
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That's cool, TooShort... I sound a lot crustier than I really am.
You provided a lot of good info here... I have a little more piece of mind now.
I'm pretty confident I can get things to within a couple of mm.
I actually find mm a LOT easier to read than 1/16ths of an inch. Those little marks get really tiny
You provided a lot of good info here... I have a little more piece of mind now.
I'm pretty confident I can get things to within a couple of mm.
I actually find mm a LOT easier to read than 1/16ths of an inch. Those little marks get really tiny
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Maxx, that is cool!.
The rim is labeled Ranger, fwiw, but yeah, it's actually labeled with the ERD. How nice... I wish the hub was, too. And speaking of "hub", it's listed as a SuperStock Disc, which is fine except every SuperStock Disc I've seen says it's got 28H. Mine has 32H so who knows what it really is? But seeing how my front spokes are 292mm (maybe 293mm, sure), then your figure of 293mm/289mmm sounds pretty reasonable.
I wish I brought in the rough hub dimensions I took last night, I won't trust my memory at this point.
The rim is labeled Ranger, fwiw, but yeah, it's actually labeled with the ERD. How nice... I wish the hub was, too. And speaking of "hub", it's listed as a SuperStock Disc, which is fine except every SuperStock Disc I've seen says it's got 28H. Mine has 32H so who knows what it really is? But seeing how my front spokes are 292mm (maybe 293mm, sure), then your figure of 293mm/289mmm sounds pretty reasonable.
I wish I brought in the rough hub dimensions I took last night, I won't trust my memory at this point.
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Your in luck, there is an obscure Bontrager Hub manual on the internet somewhere. (I got the data but lost the web address)
Final calculations are..............................survey says
front left 291.8mm.............front right 292.7 292 both sides was close enough
rear left 292.8mm..............rear right 291.5 293 and 291 sounds right. Bontrager help desk seems to that the details right except for the 6 vs 9 typeo.
Now you can do it yourself and have fun.......
Final calculations are..............................survey says
front left 291.8mm.............front right 292.7 292 both sides was close enough
rear left 292.8mm..............rear right 291.5 293 and 291 sounds right. Bontrager help desk seems to that the details right except for the 6 vs 9 typeo.
Now you can do it yourself and have fun.......
Last edited by maddmaxx; 10-11-07 at 10:00 AM.