Hopefully this link will work. It's the comparison of the two bikes.
http://www.trekbikes.com/us/en/bikes...one45wsd,empty
Looks like the 3.1 can take racks and fenders, if you want to be able to add them. I don't know how much the other differences will matter. Better wheels could make a difference, I think.
Based on the msrp, Trek considers the 4.5 to be the better bike, so I would ask the folks at the LBS what benefits you get from the 4.5. Starting with the 3 series carbon vs 4 series. And the fork differences.
Also note the 3.1 does not have an option for a triple chain ring, if you want that.
Last edited by ny biker; 11-21-2010 at 09:04 PM.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles