Just snapped my frame!
Its broken, there is no doubt, if you like it and just want to ride it bond the seat post into the hole (I can dig out the name of the stuff they hold Astons together with if you like) and get some welding done where it broke, might be a bit messy, but you will never have to worry about a slipping seatpost, however you wont be able to drop it either!Posted 5 years ago
Another bike breaks in a similar place is a Pace, I forget the model, but similar in design where the frame seatube extends a long way past the top tube, I rekon if it didn’t extend through like that, and the butting on the seatube was further from the top tube, & so min insertion point that much lower for the same insertion, it wouldnt happen.
Now there is 20-20 hindsight for you.
Soma, I wasnt joking about bonding the whole thing back together, if you like riding it, then its probably worth a few quid to try.Posted 5 years agoclubberMember
The Pace RC303 was different – it had a gusset presumably to help support the same point. It cracked above the weld, not on the section inside the weld.
The seat tube/top tube junction is a common point of failure due to the loads of a rider sat on the top of a seatpost (and it’s cyclical with pedalling) not to mention the odd no footed heavy landing on the saddle.Posted 5 years agopdV6Member
Min insertion is specified for the post, not the frame. As has been pointed out lots, that style frame would need a lot more post in the tube to support it properly and even then might not due to tube butting.
Simply put, aluminium fatigues and goes brittle over time (work hardening) and the leverage of body weight at the end of a seatpost acting on that extended seat tube is probably to blame.
FWIW, I enquired at Mud Dock re rider weight limits when I first got hold of an old carbon Y bike and was told that there was “no limit” as they were designed for Americans… Don’t know if the same holds true for GF alu frames.
I had a 12 year old Marin that snapped at the BB junction and got a shiny new frame on warranty but did have the original receipt.Posted 5 years ago
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