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New Bontrager rim is cracked

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New Bontrager rim is cracked

Old 07-30-20, 07:52 PM
  #1  
koenbro
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New Bontrager rim is cracked

My daily driver is a 2021 Trek FX 4 Carbon that I got IIRC in May. Have about 300 miles of smooth road on it, certainly under 500. I put on tubeless tires on the stock Bontrager and noticed air loss, and When I went to look for where the latex leaks out, turns out the rim is broken. The bike is out of the 30-day warranty, but not sure what to do about the rim. Any suggestions?
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Old 07-31-20, 12:51 AM
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katsup
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Contact the bike shop to see if its covered under warranty, 30 day sounds too short, especially for Trek. Look for a used wheel to use for the time being.
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Old 07-31-20, 02:53 AM
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Is that straight opposite the valve?
If it is, odds are youíre looking at the seam, not a crack.
Just about all rims start life as a straight piece thatís rolled into a hoop and joined together. Some are welded, some are pinned. Pinned is generally functionally just fine, but the hairline split will remain visible.
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Old 07-31-20, 11:46 AM
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Originally Posted by dabac View Post
Is that straight opposite the valve?
If it is, odds are youíre looking at the seam, not a crack.
Just about all rims start life as a straight piece thatís rolled into a hoop and joined together. Some are welded, some are pinned. Pinned is generally functionally just fine, but the hairline split will remain visible.
Yes it is diametrically opposite and now that you mention, there is a seam line. So it was not joined properly. The rim is advertised by Trek as being "Tubeless ready" which evidently implies you don't lose air through the rim. I mean latex was bubbling out. Now it has cured, and it holds air at low pressure (20-something psi) but can't hold 40psi. I will call Trek and see what they say. Unimpressed by quality, have to say.
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Old 08-01-20, 10:18 AM
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I am nearly 100% certain Trek will cover this with no questions asked. Take it to your local bike shop -- they'll look at it, say it's obviously not right, and theyll warranty it through Trek. Trek will likely send them a brand new wheel assembly. I had a loud freehub body on my Giant Roam and the bike shop said Giant would probably just send them an entirely new wheel (which they did), complete with disc brake rotor).
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Old 08-02-20, 08:04 PM
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Cool

New components..warranted 12 months.
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