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HELP! Got first Road Bike - Might have crack :(

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

HELP! Got first Road Bike - Might have crack :(

Old 02-08-11, 06:29 PM
  #1  
omen7288
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HELP! Got first Road Bike - Might have crack :(

I got my first road bike on craigslist this past monday. I was pretty excited
since I've had little luck scouting craigslist for my size. Inseam of 28.5" without shoes.
I found a 49cm Flyte Srs-2 for $500 with 105/ultegra. It is a little small but overall I think is good. I am 5'6" about 188 lbs. Old rider was 5'2" 110 lb female so I figured the bike was good and didn't notice anything while looking over it.

I took it out for a ride on Monday because of the good weather and got it dirtied up with salt etc. - Got home washed it down and cleaned.
While doing so I noticed a small crack in the paint on the bottom tube where it connects with the bottom bracket (if my terminology is correct).

Out of fear that this could be life threatening I wanted some opinions/recommendations on this.
I'm not sure it is indeed a crack but I'm going to assume it is - the bike has dings over various places and nothing that like the crack.

I was planning on using this as a commuter on the good days. I have 21-27 miles each way to travel and need something fast. I guess worst case scenario I can replace the frame .

Sorry for the shoddy pics - I tried to use a ruler but as you can see it isn't up against the frame tightly.



I have more pictures here.
crack

bike

Any thoughts would be greatly appreciated.
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Old 02-08-11, 06:37 PM
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big john
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Take it to a shop and show them or find someone who knows frames. Can't really see from the pics.
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Old 02-08-11, 06:37 PM
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ancker
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I'm in no way an expert but I think that's nothing to worry about.
The "cracks" are curved and smooth, the look more like deep scratches to me. I would expect a critical fault to be more straight with jagged edges.

If you're really paranoid you could sand the paint down and check the frame itself then repaint.
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Old 02-08-11, 06:40 PM
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Take it to a shop to be sure, but based on the pics it looks like it's probably just cosmetic.
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Old 02-08-11, 06:43 PM
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just cosmetic
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Old 02-08-11, 06:44 PM
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Does not really look like a crack, more like a scratch in the paint. I would expect a crack to follow the weld. If it worries you take it to a bike shop, ask them to look at it.

Secondly, bikes are not fast, riders can be fast.
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Old 02-08-11, 06:46 PM
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It looks nothing like a scratch

looks like a small crack to me, could be a paint crack but to be sure bring it to the shop.

Bike looks pretty small for a guy/girl your size
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Old 02-08-11, 07:01 PM
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Looks more like the paint cracked due to the scratching up above (or below). Take it to a shop, but I think you're fine. Ask them to size you up quickly on that bike, though. I'd imagine you'd have an awfully short torso to fit on a 49 at 5'-6." I'd go as far to say that I've never fit a rider your height on a 49. If you're a male, then I'd really be concerned (due to torso and arm length differences).
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Old 02-08-11, 07:17 PM
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Looks like something, but who can tell with the pictures. Take it to a shop.
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Old 02-08-11, 07:46 PM
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If it were my frame I'd chip back the paint where it's cracked and see if there is an actual crack in the aluminum.
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Old 02-08-11, 07:59 PM
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Deffo not a scratch, but a paint crack. Seems like an odd spot for aluminum to begin cracking. I say ride it. You'll be able to see if it spreads, then you'll know. Just check it every day or so.
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Old 02-08-11, 10:46 PM
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i agree with it being cosmetic. it really looks like a scratch but could be a paint crack just cant tell from pic
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Old 02-09-11, 09:50 AM
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Keep an eye on it but don't worry. Crack at the bottom bracket is not going to kill you.
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Old 02-09-11, 10:05 AM
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Looks like a scratch to me.
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Old 02-09-11, 06:10 PM
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First off thanks for all the replies. The next time I'm in my LBS I will ask them about it and fitting.

For the most part I think the bike is a good size for me - 5'5"-5'6" with 28.5" inseam. I have maybe 1/2" standover height over the bars before
it hits my pubic bone and won't move up any further. The stem could be longer I think though.

My first ride was a little cramped, but my second ride I raised the seat and was much better. With clipless shoes I can raise the seat a few inches over standard flats.
I also found that doing so gave me much more room comfortable position with the handlebars.

I will still be tweaking things but overall I'm pretty excited.

Thanks again for the recommendations - I will check back in after I take it to my LBS.

Secondly, bikes are not fast, riders can be fast.
True - however this bike makes it easier to go faster than my mountain bike with semi slicks and a fork that doesn't lock out.
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Old 02-09-11, 06:55 PM
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To me it looks more like a scratch or even a crack in the paint - not the metal. Particularly because it appears there are two lines side-by-side . . . doesn't seem that a crack would do that. To find out for sure you could always sand a very small part of the "crack." If it's just in the paint, you be able to sand it out. But then of course you have a sanded spot on your frame . . .
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Old 02-09-11, 07:25 PM
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That is a stress fracture in the paint caused by flexing.

I doubt there is any problem with the weld or frame. That type of cracking comes from flexing. The weld is stronger than the tube so the stress occurred at the closest and weakest point to the area of compression. The only way to determine any more from this is to remove the paint in that area or Xray the tubing. I would bet the tube is Ok but don't hold me to it. The The paint is less flexible than the tubing due to hardeners in the enamel or epoxy finish.
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Old 02-10-11, 06:34 AM
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I don't think that's a crack in the aluminium, but if you really want to be sure you need to stress the frame and see if the crack moves. The best way I can think of to do this would be to clamp a small camcorder to the frame, set it recording, and ride the bike for a bit (on an upward slope, in a high gear).

If you don't have a suitable camcorder, many cameras or cellphones will record video with adequate quality. Make sure the defect fills the frame so that you can see any flexing going on. Fixing the camera will depend on what you have. I've used miniature G-clamps before: attach the clamps firmly to the frame, and attach the camera to the clamps with large elastic bands.

If the bike passes this test, I wouldn't worry any further. Just check from time to time that the defect isn't growing.
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