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chainstay bridge
I was going to mention that as the option for those frames which have one, but I have to leave something for everybody else 🙂
Yes, the sproing is well with elastic limit, but it's added to the cyclic sproing which normal riding already applies, and aluminium alloys don't have a fatigue limit
gbj_tester
FTFY
Is this also true for crude Al frames from the dark ages?
Can't think of any 126mm Al frame other than an early Klein, Cannondale or a bonded Vitus type affair.
My touring 'dale was factory built with a 130 hub in a 135 spaced frame. Might have been an oversight, but the deformation seems well within the elastic range and the frame is still fine after >25 years.
A mildly related period article from the Tour Magazin