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Need Opinions About Rim Cracks

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Need Opinions About Rim Cracks

Old 05-18-16, 10:06 PM
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Doug64
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Need Opinions About Rim Cracks

I just noticed this around two of my wife's rear spokes. It is a Mavic 119 rim with a lot of hard miles.

Ride it or change it? No, I'm not using epoxy
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Last edited by Doug64; 05-18-16 at 10:14 PM.
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Old 05-18-16, 10:08 PM
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New rim...
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Old 05-18-16, 10:16 PM
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If it were my rim, I'd ride it while contemplating what new rim to think about getting sooner or later . . . But on my wife's bike, I'd replace the rim pronto . . . because if she ever noticed the crack, my allowing her to ride on cracked rims would be viewed very negatively, and if an eyelet ever did pull out, my allowing THAT would be pretty much a capital offense.

Are those drive side spokes? Is tension quite high?
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Old 05-18-16, 11:13 PM
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The rim is toast, but ok to ride while you find/build a replacement. Realistically, the worst that happens is a spoke pulls out, which isn't any different than any other broken spoke failure.
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Old 05-18-16, 11:21 PM
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Yes, ride it and do the replacement thing as you can. No sudden failure mode here. Andy.
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Old 05-18-16, 11:30 PM
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As noted, the rim is toast, but it's just a light golden brown so far. Leave it in a while longer (ride it) until it's a dark chestnut brown (no.6 on my toaster), but be careful not to burn it.

I've known rims like yours last a long time after cracks were spotted, then have a nipple pull through when someone tries to align them. So this is now strictly a day ride bike, and you can ride it until it gets worse, or until 30 days before an extended tour calls for something more reliable. (I never tour on anything less than 30 days old, tires being the only exception).
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Old 05-19-16, 04:40 AM
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"... a lot of hard miles..."

Shop for a rim & new spokes to rebuild the hub, if the hub is still in good shape.
Or take the opportunity for a new wheel if the hub's well past it's prime.

On a newer wheel, sometimes you can replace just the rim (same effective diameter) reusing the spokes.
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Old 05-19-16, 05:16 AM
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You'd better get some jam, because that rim is TOAST.
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Old 05-19-16, 06:47 AM
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Originally Posted by jyl View Post
If it were my rim, I'd ride it while contemplating what new rim to think about getting sooner or later . . . But on my wife's bike, I'd replace the rim pronto . . . because if she ever noticed the crack, my allowing her to ride on cracked rims would be viewed very negatively, and if an eyelet ever did pull out, my allowing THAT would be pretty much a capital offense.
I agree. There are some things that I'd live with on a personal bike that I would not tolerate on the wife's bike or on a customer bike. The real question here is when, not whether, to replace the rim. You can put off the investment for a while if you want to but eventually the cost will remain the same.
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Old 05-19-16, 07:27 AM
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You need a new rim. Dont take a chance of it taking you down at speed when there is a total failure.
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Old 05-19-16, 07:37 AM
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you got your money's worth...

it's not a hair-on-fire issue, but why procrastinate...replace the rim.

the wifey will thank you for being attentive.
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Old 05-19-16, 07:50 AM
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Originally Posted by Andrew R Stewart View Post
Yes, ride it and do the replacement thing as you can. No sudden failure mode here. Andy.
I'll second that. It is not uncommon for Mavics with eyelets to do this, but it isn't going to just fall apart on you either. It's interesting that this is supposed to reduce stress, but I've found that rims without eyelets seem to hold up better than the damn Mavics. I don't ride them any more.
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Old 05-19-16, 08:27 AM
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Just curious, how many miles? I had an Open Pro crack at the eyelets and rode the wheel for a few thousand more miles before I replaced it. It did not fail, I just got tired of waiting.
Replace it before going on a trip.
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Old 05-19-16, 08:53 AM
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rims are consumables.
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Old 05-19-16, 10:03 AM
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Originally Posted by davidad View Post
Just curious, how many miles? I had an Open Pro crack at the eyelets and rode the wheel for a few thousand more miles before I replaced it. It did not fail, I just got tired of waiting.
Replace it before going on a trip.
About 8000 miles of loaded touring, 5 years commuting, and around town riding. I'm not sure of the total miles, but I did expect better.
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Old 05-19-16, 10:05 AM
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Thanks folks,

I'll get the order for a new rim in today. The comments about the rim being my wife's not mine was already weighing on my mind.
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Old 05-19-16, 11:25 AM
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Originally Posted by Doug64 View Post
About 8000 miles of loaded touring, 5 years commuting, and around town riding. I'm not sure of the total miles, but I did expect better.
8K miles is not good. I would expect more. I replaced set of Sun rims on my tourer that had over 60K miles on them.
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Old 05-19-16, 02:10 PM
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Originally Posted by davidad View Post
8K miles is not good. I would expect more. I replaced set of Sun rims on my tourer that had over 60K miles on them.
You are right. My wife reminded me of something this morning when we were talking about a replacement wheel.

When she was commuting, she rode into a storm grate that was not bike friendly. Luckily, it was small enough, that the wheel did not drop completely into it. However, she hit it pretty high speed and hard enough to pinch flatted both her front and rear tires. When I was changing tires yesterday, also when I noticed the cracks, I say a small almost identical dents in the side walls of both front and back rims. I suspect that this incident had a lot to do with the cracks. She was lucky and did not get hurt.
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