I found a set of Matrix tubulars on CL today - seller says they have SE Sansin hubs and a Sunrace 7 speed cassette. I haven't been able to find any other info on this combination. They're the non-aero Matrix wheels. What Treks bike would these have come on, and about how old are they likely to be?

I've had terrible luck finding a new rear hub for my old Trek, so I may get these for parts if they're in good condition.