Looking for a long heavy duty 25.4mm seatpost
A friend won a generic Miller beer branded tandem bike at a raffle and after a teardown and rebuild it was almost road worthy... Took if for a test ride with my wife and got half way down the street... before the combined weight of me and the weight on the rear handle bars crumpled the front seat tube...
Was able to use a tubing bender and straighten it out but it's compromised.
There is a beefy seat stay but it's better than halfway down the seat tube and about 8 inches from the bottom bracket. With the included post an inch lower than the minimum insertion point it's about 5 inches short of the seat stay and that's where the seat tube folded... need a 25.4mm post that's though enough to compensate for the sub par frame material and construction... And long enough to go all the way to the bottom bracket... So at least 2 feet... 30 inches would be better so I could take of an inch and have it all the way to the bb.
My other option is to weld in some tube stock to reinforce the seat tube... Which is a lot more work than I think it's worth but may be necessary.
Any suggestions are welcome.
Posted Nov 1, 2013, 6:58 PM UTC
Just buy another frame. Why would you trust something that has failed like that?
because the reset of the bike isn't as flimsy as the poorly designed front seat tube. the rear one has stays right below the clamp... if the bike came with a seat post that was 8 inches longer or my friend and i were of normal height it may have never been an issue...
on top of that this is r/bikewrench if i wanted to just buy another one i wouldn't of bothered posting here...
it will probably take an hour to cut and weld in a new seat stay, prime and paint to match, excluding cooling and drying times, and i have everything but the color matched paint for the top coats... but i figured i'd pick the communities brain first...