You need to be looking at the reach (Centre of BB shell to top centre of head tube) rather than wheelbass, for example, a frame with high bb with feel much shorter than a frame of the same wheelbase which has low bb. I beleive the onza t-rex frames have good reach, but you are best looking on www.tartybikes.co.uk to see what frame has the longest reach. It also helps to have a long stem set up and risers. Edit: Just looked into it abit more, I reckon the best option available at tartybikes would be the Onza Limey 2. The Geometry when measured with Echo Urban forks are as followed. Wheelbase: 1085mm Chainstay Length: 380mm BB Rise: 10mm Head Angle: 72.5 degrees Centre of BB shell to top centre of head tube: 695mm (27.25")