Hi
I have a Thorn Nomad. The bike came with straight bars and I replaced those about three years ago with the Jones H-Bar - and I have no regrets. In fact I wish I had done it sooner. A couple of things to be aware of:: 1) The H Bars are swept back so you will likely ride in a more up right position. As such you may have to change your seat fore-aft position. 2) Your existing cables and clamps (e.g., brakes) may or may not have to be replaced. I didn't have to replace any of my cables - including the ones for shifting my Rohloff hub. Again no regrets - the H bar is great.