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Thread: Bad day

  1. #1
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    Bad day

    Went out for normal wednesday night ride. It rained like a mofo but I went out with 1 rider. He rode half the way with me then headed home. Anyways the gears were skipping like a mofo. I went to the shop and they think the frame is cracked. Unfortunately I bought it used and the warranty doesn't transfer. And I have a triathlon next weekend UGH!!! and I leave for maine tomorrow, maybe raleigh will be cool and warranty the frame anyways.

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    That sucks. Hopefully Raleigh will fix the frame for you.
    It is not about the destination. It is about the journey getting there.
    Competitors work until they get it right, but champions work until they can't get it wrong.

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    Senior Member rdtompki's Avatar
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    The phrase "Think the frame is cracked" sounds very sketchy. What material construction is the frame and where do they think it is cracked? Maybe a material/mechanical guy will chime in.
    Rick T
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    It is cracked just behind the bottom bracket. The frame is an aluminum alloy/carbon fiber composite. I can see a crack, just in my head telling myself it is just a crack in the paint. But in reality the way the gears are skipping it is because the frame is flexing. I am an engineer and it makes sense.

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    Senior Member spthealien's Avatar
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    So what happened?

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    Senior Member Seattle Forrest's Avatar
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    Quote Originally Posted by daffonce View Post
    It is cracked just behind the bottom bracket. The frame is an aluminum alloy/carbon fiber composite. I can see a crack, just in my head telling myself it is just a crack in the paint. But in reality the way the gears are skipping it is because the frame is flexing. I am an engineer and it makes sense.
    Even if the paint is cracked ... I'm wondering how that might happen, and what else might be affected?
    Don't believe everything you think.

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    The bike is currently sitting in my bedroom waiting to be stripped of parts. It has at least two cracks. On in the wishbone right behind the bottom bracket (this is Al for sure). Another were the Carbon fiber and Al of the downtube connect. I was told the bike had not been crashed. I was told it was bought as left over inventory in 08 riden 08 and 09, I bought Xmas 09. The bike is very clean, therefore I find it hard to believe it was crashed. I take it that it was riden in many hills based on its original location. When the issue occured I just started to climb a real steep hill (0-6+% instantly). I was about 4 gears too high. I am a big guy with very strong legs (ex college football lineman), I laid into the cranks to keep moving while i frantically shifted into a more appropriate gear. I do not know if maybe the bike had been crashed, if it was just fatigued from past hill climbing, or if my leg power + weight was just too much for the frame. somehow it cracked in multiple places, if you put force on the pedals you can see the flex in the bottom bracket area. in the end I decided a $1200 investment in a new bike was a better investment then waiting for a crack to give while I was on the bike. If you would like i'll shoot some photos of it, and once I strip the parts that will be sold I am comptemplating sanding down the areas in question. The guys from the bike shop said that a lot of CF/Al composite bike develop cracks in the paint at the joints of CF/Al. The two materials have different stiffness' therefore the two strain differently under riding, and the paint isn't flexible enough. Raleigh put a sticker over every CF/Al junction, I'm willing to be this was to cover up said paint defects.

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    my money is on "it was crashed".

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    even if there was no nicks in the paint/clear coat? I mean the whole frame was perfect and it is two colored (orange and CF). Still a possible crash victim?

  10. #10
    Senior Member Wogster's Avatar
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    Quote Originally Posted by daffonce View Post
    even if there was no nicks in the paint/clear coat? I mean the whole frame was perfect and it is two colored (orange and CF). Still a possible crash victim?
    I think what we need here are some photographs, first one that shows the bike from the side against a nice neutral surface taken from bike level, this should be from the drive side, and then closeups of the area affected.

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