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  1. AAwhereintheworld64 on

    I’ve taken three sets of rims to this state (because I’m cheap, not smart). Same hub through all the rims…originally Mavic Speed City wheels. Mine would tell me they were done when I started getting flats with no explanation and then noticed circumferential cracking on the rim. Nothing catastrophic, but could be…the thought of a shiv of fractured rim material driving into my calf led me to pay more attention.

  2. NichtsNichtetNichts on

    Yes. Replace this immediately.

    It’s easiest to replace the whole wheel. If you have time and patience, you can rebuild this wheel with a new rim.

    For the new rim: It will likely have a wear indicator. Replace when the wear indicator is worn or when the rim bends. It’s best to actually measure the rims thickness but it’s more work. 1mm minimum is broadly used. Check your rims specification though.

    This rim is a safety concern. You need to replace it.

  3. Looks like it’s reached the time to replace it to me.

    Can’t guarantee this on your rim but many rims have a wear indicator somewhere on them it’s a small drill hole usually in the middle of the breaking surface and once the rim is worn to it’s limit the hole can no longer be seen.

    If the hub is decent quality get a new rim built onto it if not you now have a guilt free reason to treat yourself to a new wheel or two.

  4. Flashy-Confection-37 on

    The concavity means you should replace the rim. The rim wall is probably very thin at this point, and could fail from a weak impact.

    Many rims have indicator dots poked into them; when the dot disappears it’s time to replace it. When I build a new wheel I use a color anodized spoke nipple next to the indicator mark so I can always find it.

  5. i would feel proud to wear a rim down to that. how much mileage went into those rims? 12,000km?

  6. I had a front rim like this that came apart. A seam developed right at the thinnest point. It happened slowly and I noticed the brake pulsating. a few more revolutions and it could have jammed my brake and sent me over the bars.

    replace it.

  7. Revolutionary_Pen_65 on

    obviously this isn’t safe to ride anymore as is. seeing as replacing rims is a big investment, at least consider replacing the bike or fork and get something with disc brakes. if this is for a customer make sure you at least assess whether they know about disc brakes before taking their $.

    2 new rims and the labor is going to run in the neighborhood of 25-50% of the cost of a cheap bike with disc brakes. if this thing is a vintage collector thing and they just ride it in good weather, or they’re a roadie and this is their fair weather bike, send it. but i’d at least consider and/or inform about improvements to brakes since these were common.

  8. Greedy_Pomegranate14 on

    That looks like a goner to me. If you look up your specific rim online, or contact the company, you can find out the amount of concaveness that I’d deemed acceptable or not

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