Rim Replacement
08-26-20, 06:45 PM
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Rim Replacement
I have an older front wheel from a 1991-ish road bike that has a Shimano 105 hub laced into a rim that has no branding and no information visible. I can measure the width pretty easily, but finding the ERD of the rim is where I'm getting stuck. Every guide I can find for measuring ERD assumes I am starting with an empty rim, but in my case, I am not.
I would like to replace this rim because the brake track is worn, but I do not want to have to re-lace the hub from scratch. I've done this operation of moving one spoke at a time into a new rim before, but in those cases, I new exactly what rim I had and I was using an exact ERD replacement. It was actually really easy to just line up the two rims side-by-side, and migrate the hub & spokes over.
How can I measure the ERD of this rim, without un-lacing the hub? Or should I just bite the bullet and un-lace it, order a new rim, and use a spoke calculator to select some new spokes, too?
I would like to replace this rim because the brake track is worn, but I do not want to have to re-lace the hub from scratch. I've done this operation of moving one spoke at a time into a new rim before, but in those cases, I new exactly what rim I had and I was using an exact ERD replacement. It was actually really easy to just line up the two rims side-by-side, and migrate the hub & spokes over.
How can I measure the ERD of this rim, without un-lacing the hub? Or should I just bite the bullet and un-lace it, order a new rim, and use a spoke calculator to select some new spokes, too?
08-26-20, 11:12 PM
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I'm assuming the spokes are going on 30 years old? What kind of life have they led?
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08-27-20, 10:40 AM
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Alright, sounds like I'll be ordering some new spokes with the new rim. Thanks for the feedback!
08-27-20, 04:06 PM
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Price out the cost of rim plus spokes. A complete new wheel might not cost any more. Check the hub carefully, after all it is 29 years old and could be showing signs of wear
08-27-20, 06:32 PM
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Time to upgrade wheels.
