Originally Posted by
onyerleft
Yes, they're rare, if for no other reason than that when aluminum breaks, it usually can't be fixed.
To fix something, it’s gotta first be made. To me it’s a matter of money. How many track frames are made annually vs road? For a big makers, why tie up expensive tooling on your lowest volume product? For a small maker, aluminum would likely be a non starter for any frame due to cost , and space limitations.