shmoos cycles - Trek Singletrack 990 frame dimensions are: seat tube centre to centre 18 1/2" seat tube centre to top is 20" 22 1/2" top tube length frame material is True
Olivia's Touring Bike, 1991 Trek Singletrack 990… – blog.peterlombardi.com
1992 Trek 990 restoration - advice required! | Mountain Bike Reviews Forum