Sorry. Malkin, you sum it up pretty well. I currently have stock saddles on both bikes. The roadie is a 2012 Scott Speedster Contessa. The hybrid is a 2011 Novara Fiona. I've never had a saddle fit.

Yes, the backpack and its added weight seems to create the problem. Hybrid is comfy with backpack or without, but roadie is only comfy without a backpack.

My comment about saddles, seat posts and a 4th bike were meant as: I currently have 3 bikes. Hybrid, mtn, and road. Someone suggested a new saddle for commuting purposes only for the road bike, but to aid switching back and forth, I'd need a post for each saddle, marked for proper positioning. Or a 4th bike to use as a commuter only. Don't think I can get DH to agree to that one...

Does that clarify?