Trek
 

How did Trek do there numbering system? Is a Trek 470 better than a 2000?

higher number the better

In general. The exception would be the 170 -- a custom built Reynolds 753 frame bike.

I think the 3-digit ones were steel and the 4-digit ones aluminum.
-20's (420, 520, 620, 720) were touring, -60's (560, 660, 760) were racing.

+1 3 digits are steel, four digits aluminum. And then they mucked it all up by recycling the same model numbers, for example, the 720 started as a top of the line touring bike in the 1980s, then reappeared in the 1990s as a basic hybrid.

And they're classics, too - thanks John.

hmm your logic doesn't add up the technium 440 is an aluminum bike.

That would be a Raleigh I believe.

heres my sign... doo doo doo. my momma says i'm special but my daddy says i'm stupid. Guess it was a long day.