Originally Posted by
mountaindave
I would stay away from a Sirrus, they didn't come along until late 80's and are race oriented - no room for fat (or even normal) tires.
Man there are a lot of awesome options here - That Trek would be a fantastic alternative, might even get bumped to the top as it's MUSA-approved.

Looks like an 86BCD crank that could easlily be made into a super compact setup. Odd that I can't seem to place it though. Must be 81-83 with braze-on cable guides and the decals. But the color looks like later 80's. I'd check the serial # against the Trek list. Those low-rider mounts are throwing me too.
I have a 2001 specialized sirrus and it fits 700 x 32 tires easily but I run armadillo 700 x 30 on em. If sirrus is race oriented then I am doing something wrong. To me it is a hybrid bike meant to have good specs and groupset and quality rims but not meant for racing. More so fast touring or city biking.