Big H* Posted August 30, 2011 Share This is a Castweld repair! And that frame was thoroughly thrashed after it was repaired - still fine! What is castweld? Link to comment Share on other sites More sharing options...
jimmy hardtail Posted August 30, 2011 Share Any welded ally frame will crack again. Its just a matter of time. The stresses in ally are different to steel in that any force no matter how small will cause stress in the material. All aluminium frames will crack eventually . The better ones will take many years though. This is why you shouldnt by a very old dh frame. Its gonna break some time! Link to comment Share on other sites More sharing options...
'Dale Posted August 30, 2011 Share Eina, rouxtjie! Hope you get sorted quick-quick with a dependable solution. Link to comment Share on other sites More sharing options...
rouxtjie Posted August 30, 2011 Share This is a Castweld repair! And that frame was thoroughly thrashed after it was repaired - still fineThanks Ben and vark-man-beer-sekind, will look into it. Just a question. Is the diameter of the seat tube the same all they way in? Does the diameter increase slightly due to the tubes being butted. Why is shims only 100mm or shorter?If this is the case a longer seat tube will only make the situation worse?Just asking?Ja, the diameter is the same. Look I could feel something happened with the post while I was riding but didnt stop to check...I know I should have but the daggapad at van gaalens is a blast so I just carried on. At oom Piet's on the rutted downhill part I forgot about the post tried to do a greg minaar on a hardtail with a slightly bent post, this is the net result which is a shame, like JB said, the paintjob was lekker. Eina, rouxtjie!Hope you get sorted quick-quick with a dependable solution.No fear Bender, I got me a clownbike aka GF Hi-Fi Pro, this was my training bike anyways. Link to comment Share on other sites More sharing options...
rouxtjie Posted August 30, 2011 Share Post a picture of the seat postWill take some tonight with ruler next to it, crazy skew Link to comment Share on other sites More sharing options...
Big H* Posted August 30, 2011 Share Ja, the diameter is the same. Sorry my stoopit, it seems that the butting takes place from the outside of the tube. See the pic below. Still am I right with my asumption? Edited August 30, 2011 by eccentric1 Link to comment Share on other sites More sharing options...
rouxtjie Posted August 30, 2011 Share I will check again, but I am almost 100% sure the seat tube isnt butted so straight gauge, I agree, I dont think a longer post would have helped here, the fact that it got bent and that all the stress from then on would be isolated to a tiny area was the cause imo. Either that or my awesome riding skills I will take pics of the post tonight, looks like an upside down setback post...weird Link to comment Share on other sites More sharing options...
Christie Posted August 30, 2011 Share +1 to what JB said.It's toast Link to comment Share on other sites More sharing options...
Grebel Posted August 31, 2011 Share As per Bigben, get it welded. You need to take it to a specialist welder though. They will do it properly. You might need to cleam up the inside of the seat tube afterwards with a half round file though. If the seatpost goes in far enough after welding it should be fine. I know of three bikes that have been welded due to cracking. A Felt HT on the chainstay, a Mongoose in the same area as yours and a Spez aroung the head tube area. All bikes got a new coat of paint and are still going strong months after the repairs! All ridden by "Big" guys and ridden fairly hard. If you do decide to toss it, send me a PM. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now