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  1. #1
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    New question here. WTB Laserdisc Trail 29er ERD

    I post this thread at Wheels and Tires but nobody response.

    I want to built a wheel with this rim http://www.chainreactioncycles.com/M...?ModelID=49026 and alfine hub. The problem is the ERD. WTB site says 605mm. But... I have two pairs of wheels with these rims and the sticker on the rim writes 602 ERD. I can not make an exact measure by myself, on the complete wheels.
    Using spocalc for alfine hub and WTB Laserdisc Trail 29er combo:
    for ERD 605 -> spoke length 287.7/288.3 or
    for ERD 602 -> spoke length 286.2/286.8
    Has anyone built a wheel with this rim and what was the ERD you took into consideration?

  2. #2
    1*14*29*2.1 & 1*1*29*2.4
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    try the 29er forum if nobody chimes in here too.

  3. #3
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    If you know the nipple lengths in your built-up wheels (12mm?) you could calculate the ERD by measuring the distance from nipple to opposing nipple and then adding 2 x nipple lengths (or adjust this if you don't want the spokes to end up flush with the nipple head).

    I've got a long pair of vernier calipers that I use for this but you could make a gauge out of pretty much anything and then measure it against a steel rule.
    Personally I'd go by the rim sticker dimension, rather than that given on the WTB website.

  4. #4
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    Thank you Andy.
    I ordered the 288mm spokes considering that 603ERD on the rim is right; plus the nipples' heads we have about 605mm . I hope my hypothesis is right or else the spokes will stick out of the nipples about 2mm.

  5. #5
    Drinkin' the 29er KoolAid
    Reputation: kwarwick's Avatar
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    Confirmation on ERD?

    So I'm in the same boat, trying to figure out if the ERD is really 605. A call to WTB confirmed the 605 ERD, but it is still disconcerting that there are more than a few references that say 602. How did those spokes works out for you?

  6. #6
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    ERD confirmed here.
    Brisbane, AU

  7. #7
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    I just built a set 2 week ago, alfine 11 hub to that rim 288mm spokes
    Josh

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