If there is enough room to extend the slot and the tube is the right diameter for a seperate clamp, cutting a bit of sounds like an option worth consideration if you would like to use the frame in the future.
Frame failure experiences
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If there is enough room to extend the slot and the tube is the right diameter for a seperate clamp, cutting a bit of sounds like an option worth consideration if you would like to use the frame in the future.
highlandsflyer
Retro Wizard
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Have you any idea why it cracked in the first place? Wasn't it there when you bought it? Yes, you have options thanks to that extended seat tube, I have carried on riding much shorter ones with similar issues. Your picture wasn't very revealing, hence my premature asseveration. If you are happy the rest of the frame is sound, do your damnedest to make it live.
No idea why it cracked. The crack was probably there when I bought the bike, I've simply overlooked the most basic inspection. But persistent rumours BITD were that most of the Scrambler Lines built have broken. Giving Lapierre customer support headaches, as Lapierre was distributing Scrambler Line, before buying it and quickly shutting it down. I don't know whether Lapierre shut Scrambler Line down because of too high failure rate or not. As I said, it was rumours. And I failed at gathering evidences of broken Scrambler Lines (to this day). Was it a particular model: Thévenard, Taillefer, Yearling, ...? A specific year: they changed from U-brake to canti bosses, from classic seatstays to monostay/wishbone on the Thévenard for example, ...? A manufacturing change: were all Scrambler Lines assembled using ATS (Azote Tubing System) process where internal lugs (which material?) were colded in liquid nitrogen and inserted into the tubes (which ones? Main triangle only?) before being welded. Where were they more prone to break? Lot of questions without clear answers. One sensible information I was able to get (cannot remember the source anymore; was it blog, website, magazine, book, ...?) was that Aviatube 6106 aluminum alloy, by contrast with more classic 6061 T6, was lacking a heat treatment to restore the crystal structure. Now, is the lack of heat treatment inherent to a specific alloy or rather its use, I don't know. And is this lack of heat treatment the cause of the crack in the seat tube, I've no clue.
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