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Kinda Urgent - Help Spoke Length...

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Old 02-22-19, 10:57 AM
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randyjawa 
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Kinda Urgent - Help Spoke Length...

Blew a spoke on the back wheel of my Bianchi, here in Jamaica, this morning. The wheel sports a Campagnolo Record hub from the early eighties and is laced to an Ambrosia Elite rim. My notes, regarding the spoke length, are in Canada. So...

Does anyone know the length for the spokes of a 700c Ambrosia Rim (36 holes with three cross) to a Campy Record hub. Once I have this information, I will see if my Black River bike shop friend can help me sort this out. Thanks.



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Old 02-22-19, 11:01 AM
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Why not just measure the existing ones?

Or you can type in all the relevant info here: https://www.prowheelbuilder.com/spokelengthcalculator
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Old 02-22-19, 11:05 AM
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using edd https://leonard.io/edd/ (see pic for details) i got 300.5 for left 299.1 for right but check the selections used......






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Old 02-22-19, 11:09 AM
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https://leonard.io/edd/

Leonard says

297 right side (drive side) rear

298 left side rear.

Since you have the wheel, you don't really need a spoke calculator. You can measure the spoke on the wheel, or piece together the broken one and measure that.

EDIT: beat me to it^^^ I used "super elite" 622 not elite 630, based on the sticker. ERD 615

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Old 02-22-19, 11:20 AM
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Originally Posted by Salamandrine
https://leonard.io/edd/

Leonard says

297 right side (drive side) rear

298 left side rear.

Since you have the wheel, you don't really need a spoke calculator. You can measure the spoke on the wheel, or piece together the broken one and measure that.

EDIT: beat me to it^^^ I used "super elite" 622 not elite 630, based on the sticker. ERD 615
I missed seeing super elite go with Salamandrine for the win
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Old 02-22-19, 12:26 PM
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Originally Posted by lostarchitect
Why not just measure the existing ones?
Too easy. We gotta overthink this stuff.

The hard part is mounting a tire on those rims.
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Old 02-22-19, 12:31 PM
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Originally Posted by SurferRosa
Too easy. We gotta overthink this stuff.

The hard part is mounting a tire on those rims.
Still overthinking it. You can remove a spoke and measure it without disturbing a tire.
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Old 02-22-19, 01:29 PM
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Originally Posted by ThermionicScott
Still overthinking it. You can remove a spoke and measure it without disturbing a tire.
Maybe you can! I have a hard enough time truing the wheel with the tire on there. It messes with my sight. A truing stand might help, but I'm a cheap bastage.
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Old 02-22-19, 01:47 PM
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Originally Posted by SurferRosa
Maybe you can! I have a hard enough time truing the wheel with the tire on there. It messes with my sight. A truing stand might help, but I'm a cheap bastage.
I'm both a cheap and lazy bastage. I did buy a truing stand, but with a broken mount, so it was, like, $5 at a swap years ago, and it's a slight PITA to use with the funny mount. And I'm often too lazy to use it. If it's just a quick post-pothole true-up, or after a single spoke replacement, I true the wheel "in frame" on the work stand, tire on, and just hold something (literally whatever's handy, a pen, a screwdriver, the spoke wrench...) on the stay next to the rim, and spin it. So I'm not dependent on eyeballing it.
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Old 02-22-19, 03:33 PM
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Originally Posted by madpogue
If it's just a quick post-pothole true-up, or after a single spoke replacement, I true the wheel "in frame" on the work stand, tire on, and just hold something (literally whatever's handy, a pen, a screwdriver, the spoke wrench...) on the stay next to the rim, and spin it. So I'm not dependent on eyeballing it.
I like this approach.

What often gets me is that a rim is a tiny bit bowed or wider at one spot, and I'll true it over to one side, then the other, maybe two or three times before I realize what's going on.
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Old 02-22-19, 06:25 PM
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Originally Posted by SurferRosa
Maybe you can! I have a hard enough time truing the wheel with the tire on there. It messes with my sight. A truing stand might help, but I'm a cheap bastage.
I figure the OP's wheel is out of commission anyway, so nothing needs to be done with the tire to unhook one spoke for measuring. Once the replacement spoke comes in, then he can deal with removing a tire and getting it fixed up properly.
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