Worn rim?

father_jack
father_jack Posts: 3,509
edited July 2014 in Road general
Do you think this had it's day?

rim.jpg
Say... That's a nice bike..
Trax T700 with Lew Racing Pro VT-1 ;-)

Comments

  • comsense
    comsense Posts: 245
    Looks like it.
    Can you fit a business card n the gap? thats a good test. On ebay you can buy a Gauge Spring Measuring Caliper for about a fiver - recommend them highly as they fit over the rim and measure accurately. Having had a front wheel rim blow out on a descent and survived I have no intention of ever repeating the experience
  • ugo.santalucia
    ugo.santalucia Posts: 28,317
    Yes
    left the forum March 2023
  • Sir Velo
    Sir Velo Posts: 143
    Looks like they a quite worn, worst than a pair I have that a sitting doing nothing at the moment.

    Question for Ugo (especially as I am live in Richmond as well, he case he has some good ideas).
    Got some Mavic Ksyrium SL and the rims look a bit worn, is there any "cheapish" way to rebuild with new rims (I guess they will end up being expensive from Mavic). I have some good miles out of them so not too worried about sending them to turbo duties and looking for some other wheels.
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    Ride it til it rips you a new ar$ehole
    I'm sorry you don't believe in miracles
  • ugo.santalucia
    ugo.santalucia Posts: 28,317
    Sir Velo wrote:
    Looks like they a quite worn, worst than a pair I have that a sitting doing nothing at the moment.

    Question for Ugo (especially as I am live in Richmond as well, he case he has some good ideas).
    Got some Mavic Ksyrium SL and the rims look a bit worn, is there any "cheapish" way to rebuild with new rims (I guess they will end up being expensive from Mavic). I have some good miles out of them so not too worried about sending them to turbo duties and looking for some other wheels.

    Realistically no... nothing worth spending money on... the hole count is against you. Very few rims at < 20 holes... very few options for "solid" straight pull spokes
    left the forum March 2023
  • reg_
    reg_ Posts: 21
    Father Jack wrote:
    Do you think this had it's day?

    rim.jpg

    That looks well worn out to me. Not worth the risk.
  • Sir Velo
    Sir Velo Posts: 143
    ugo.santalucia wrote:
    Sir Velo wrote:
    Looks like they a quite worn, worst than a pair I have that a sitting doing nothing at the moment.

    Question for Ugo (especially as I am live in Richmond as well, he case he has some good ideas).
    Got some Mavic Ksyrium SL and the rims look a bit worn, is there any "cheapish" way to rebuild with new rims (I guess they will end up being expensive from Mavic). I have some good miles out of them so not too worried about sending them to turbo duties and looking for some other wheels.

    Realistically no... nothing worth spending money on... the hole count is against you. Very few rims at < 20 holes... very few options for "solid" straight pull spokes


    Many thanks Ugo, I thought as much. Might get a few more miles but to be fair they have served me well, might be in touch sometime about some hand (Ugo) built wheels if nothing comes up on he classified ready for winter training.
  • sigorman85
    sigorman85 Posts: 2,536
    Ask your self the question major injury or a dent in the bank balance ?
    When i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!


    De rosa superking 888 di2
  • Initialised
    Initialised Posts: 3,047
    How old is the wheel is years and miles and how much will a replacement wheel or rim and wheel build cost?
    I used to just ride my bike to work but now I find myself going out looking for bigger and bigger hills.
  • andrew_s
    andrew_s Posts: 2,511
    The required measuring tool is an Iwanson gauge:
    http://www.ebay.co.uk/itm/like/23072178 ... 0&ff14=108

    Those rims I've had fail have done so at about 0.6 to 0.7mm wall thickness, so replace if you measure less than 1.0mm anywhere.
    You can check if a rim is currently OK by inflating the tyre to 160 psi or so with a track pump and leaving it for an hour or five. If it doesn't go BANG!, and isn't a visibly different shape than it was before, it's OK for a while. If it does fail, you'll need a new inner tube as well as a new rim.

    Going by the photo, it's time to order a new rim (or wheel if you don't DIY).
    If you do DIY, get the new rim (same size (ERD) as the old), tape it to the old, move the spokes over, then tension and true. If you take a new rim to a bike shop, they will normally insist on new spokes as well.
  • rolf_f
    rolf_f Posts: 16,015
    Check the internal width - the shape of the braking surface isn't going to tell you much. Campag, for example, tell you what the internal width should be - if it is as spec then it should be fine. I use a pair of Khamsins on my commute that have similar brake track wear to that - the internal width is still in spec and the brake wear track hasn't quite yet worn through (ie they are designed to exhibit this sort of track wear well before they are worn out).

    It's down to the thickness of the track when new as to whether or not the rim is worn out. Put it this way - if your rim was solid all the way across, you could have a brake track that looked exactly the same but had over 2cm of metal behind it.

    I'd take the approach suggested by Andrew S above or checking manufacturers guidance rather than guessing. That track will have looked much the same a couple of thousand miles ago.
    Faster than a tent.......
  • wishitwasallflat
    wishitwasallflat Posts: 2,927
    My last open pro rims looked slightly better than that, measured at about 1mm with Iwanson gauge and cracked, I noticed the crack (thank god) and pumped it up to 145psi or so and it split open completely.

    Get new wheels.

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