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Dent in downtube, critical? - Quantec Race SL

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Dent in downtube, critical? - Quantec Race SL

Old 02-04-16, 05:35 PM
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Dent in downtube, critical? - Quantec Race SL

Hey there,

I bought a used bike last year, Quantec Race SL, Ultegra Group, good thing. Barely used it since I moved, maybe 20 times so far. As the season is about to start I cleaned and checked my bike yesterday, so I turned it upside down - and found a dent which def. was there the time I bought it.

The dent is about 2.5 cm long and + - 0.5-1 mm deep, underside of downtube, about the level of the pedals. The dent runs in the width. This looks to me as if the former used clamped it too firmly, as an imprint of the cable can be seen in the paint and the dent is virtually divided into two parts. Is this something critical? I'm torn, I'm really anxious for one - on the other hand it would be, financially-conditioned, the secure off for the entire season 2016. The frame is 7005 aluminum Superlight.

Enclosed pictures using solid n massive Paint-Skills.

Btw: Itīs never too late to learn German folks

Abweichung von der Ideallinie - Deviation from the ideal line
Vermutliches Klemmprofil - Presumptive clamping profile

Listen and repeat

Thanks for your help

IlluX
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Old 02-04-16, 05:54 PM
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Looks minor, too minor to affect durability .... but that is a guess which could be proven wrong when the frame explodes into a hail of metal slivers while you are riding it.

I wouldn't think twice about it ... but then, it is often hard for me to even think once.

You know, I have never even considered das richtige Klemmprofil.
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Old 02-04-16, 05:56 PM
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It does not look too worrisome at all and should be safe for quite a long time, if not forever. Still, you should check on it from time to time to see if the dent has expanded or worsens. The downtube does take most of the stress of the frame. That tiny dent is still the point of weakness and will be the first place to go.
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Old 02-04-16, 06:16 PM
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Originally Posted by Maelochs
You know, I have never even considered das richtige Klemmprofil.
You should unless you want to destroy your frame

Frames made of aluminium donīt exactly explode, right? Carbon frames do (or may), I have seen that before.
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Old 02-04-16, 06:22 PM
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That frame is toast. You can send it to me for proper disposal.
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Old 02-04-16, 07:01 PM
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Macht nichts.
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Old 02-04-16, 10:03 PM
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If you'd bought a Slingshot, you'd have never had that problem.



You be the judge if a dent like that would matter.
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Old 02-04-16, 10:57 PM
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In that location, a failure would not likely produce a life changing event --- ride on until it fails - or until you get sick of riding it and move on
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Old 02-05-16, 05:21 AM
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Originally Posted by banerjek
That frame is toast. You can send it to me for proper disposal.
No, I am more qualified to dispose of that ruined, no good, totalled, worthless frame.
The components are shot too, just send the whole bike.
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Old 02-05-16, 11:07 AM
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Funny, there's a dent like that, and in almost the same location, that came with my used Klein. Not a problem. (And I've put thousands of miles on the bike in the 4 years I've had it thus far)
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