Rear wheel cracked - BMW K1600 Forum : BMW K1600 GT and GTL Forums
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post #1 of 17 Old 05-26-2019, 08:19 PM Thread Starter
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Rear wheel cracked

Went to replace my rear tire this week and was shocked to find this when I took the rear wheel off. I never really checked the wheel closely in the last 8 months of riding since the last tire change, but I also don't recall hitting any pot holes or anything thay would have caused this. It's not cracked all the way through, still holding air. The shop said they didn't recommend fixing it. They have no problem fixing wheels with bends, but said that with the size of the crack, they didn't feel comfortable repairing it. They suggested buying a used wheel in good shape for about $500 (they recommended some salvage places to get it from, wheels are like new, bikes with less than 6k miles and had front end damage so rears are good) or a new wheel to the tune of $1200+. I went with a rear wheel from a salvaged GT, found a gloss black one which now gives me an excuse to powder coat my front wheel gloss black, and also gives me the excuse to change my front bearings (25k miles) while I'm at it.

Anyways, anyone else think it's worth repairing this thing as a spare wheel? Anyone else have one that cracked like this?
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post #2 of 17 Old 05-26-2019, 08:33 PM
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That looks like the result of a cold hammer repair to the alloy of the wheel that has fatigued over time. (Another reason I choose not to repair wheels).
Personally I would throw that away, unless you're in need of a spare boat anchor!

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post #3 of 17 Old 05-26-2019, 08:49 PM
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The bike has only 25.000 miles on it and there are no signs of brute force to be seen? Looks like a fatigue crack, but I am not sure why it is in that area. I would show it to BMW for validation. Could road salt exposure be an option?

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Last edited by ViennaK; 05-26-2019 at 08:51 PM.
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post #4 of 17 Old 05-26-2019, 09:00 PM
What is the dark tar looking stuff on it?

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post #5 of 17 Old 05-26-2019, 09:31 PM Thread Starter
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Quote:
Originally Posted by ViennaK View Post
The bike has only 25.000 miles on it and there are no signs of brute force to be seen? Looks like a fatigue crack, but I am not sure why it is in that area. I would show it to BMW for validation. Could road salt exposure be an option?
Perhaps? I ride sparingly in the winter though...


Quote:
Originally Posted by Harleymarlboroman View Post
What is the dark tar looking stuff on it?
Not sure. I'm away right now so I can't go out and take a closer look, but it looks like some type of hard tar type mateiral, maybe an epoxy smeared on. Looking closely now at my original high res photo on my phone, I'm wondering if this crack has been there when I bought the motorcycle used (Feb of 2018) and was covered by something jb weld or epoxy (by previous owner) and now it's let go.

I'm not fixing this wheel, adding it to the pile of car rotors and other scrap metal going to the scrap yard this week...

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post #6 of 17 Old 05-26-2019, 11:39 PM
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Did you buy the bike from a dealer or private party?

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post #7 of 17 Old 05-27-2019, 01:11 AM
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Who changes your tyres?
Looks like the rim has been pressed from the side.
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post #8 of 17 Old 05-27-2019, 01:12 AM
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Just guessing the JB Weld was stopping the leak through the start of the crack that was caused by 1. Tire machine damage. 2. Previous owner hitting a pot hole. 3. Corrosion (least likely IMO)
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post #9 of 17 Old 05-27-2019, 06:38 AM
Quote:
Originally Posted by mglax13 View Post
Not sure. I'm away right now so I can't go out and take a closer look, but it looks like some type of hard tar type mateiral, maybe an epoxy smeared on. Looking closely now at my original high res photo on my phone, I'm wondering if this crack has been there when I bought the motorcycle used (Feb of 2018) and was covered by something jb weld or epoxy (by previous owner) and now it's let go.

I'm not fixing this wheel, adding it to the pile of car rotors and other scrap metal going to the scrap yard this week...

What I was thinking. I've seen this type of crack a few times before that occurred after trying to hammer a bent wheel back straight again. May be one of those so called "wheel repair" shops covered up their mistake with epoxy and paint. Yea, I'd scrap it.

You're not the first New Yorker with wheel damage. Seems that your roads are well known for moon craters.
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post #10 of 17 Old 05-27-2019, 07:24 AM
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I concur with Daryl's thinking, this is a 'home repair' job that went bad. I'd check you're local area and if there's a shop that does wheel repair it can't hurt to consult them. I wouldn't spend money shipping it to a repair shop not knowing if it's repairable.

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