[QUOTE]
Shane Stanley said:In article <[email hidden]>,
rooman said:my very lay expression about Alum as I see it, but its not a "memory
metal" in the chemical and metallurgist's sense, so consider
it....."stress cycles to failure" if you wish.... Alum bike tubesets
show fewer cycles to failure than steel bike tubesets of same
dimension
Who builds them to the same dimensions?
not suggesting that... just comparing apples... alloy tubesets appear bigger dimensioned than steel , but if they were the same the alloy (fill in space)...
Quoted post said:
Quoted message said:the suggestion, which I believe is the common view (correct me if you
think it's not) of riders, frame makers etc.... is that alum tubeset
may be cheaper (some) and it may be lighter (most) , and is less rigid,
and it doesn't last as long given the same stresses over time, as the
steel tubeset..
It might be a common view, but the reality is that a frame's lifespan
owes more to its design than the material used. Of course, the design
often reflects the choice of material -- that's why aluminium frames are
designed to avoid fatigue failures (something that's not hard to do).
There's a lot to be said for steel frames, especially the aesthetics
they allow the frame designer. It seems a shame that those who like them
often resort to pseudo-scientific attacks on the alternatives, though.
There are still people around who believe aluminium frames "go soft".
--
Shane Stanley
fair enough..(thought that was what I suggested..guess not).... I am not disagreeing, but I dont accept that alloy will not fail merely because its beefier( if that's what you mean by design, or are you suggesting extra cross members in the chainstay and thicker tubeset, and bottom bracket area ?..........(what are you suggesting?)
I have a "design" life on my alloy R1 bike of approx 10 years...as a result of section lengths, tubeset and layout combinations that should reflect the of the bike mainly as a performance bike in that time....that's what I was told to expect and if I get more great... I have another alloy bike, a beefy ( make that very beefy C2- that will probably outlive mankind, but it does weigh a hefty amount, but I also have four steel bikes... R2-aged 2 year2, C1-3years, T1-4 years, and Classic1-55 years respectively, all going strong and I expect they will all outlive the alloy framed R1 by decades.
My preference is for steel first, ( I just like the ride)...but I do have a Ti frame on order so I put Ti second, then Al and one day maybe ( big maybe) a carbon frame, but not in a hurry to go carbon...may change my mind...have to have a lot of wine first....meantime happy to watch other's carbons get thrown away after they get a bust up...