Basically im buying the new 20" czar frame double disk version but i don’t no whether to buy the long frame or the short frame, any views on this? I couldn’t find many reviews on the czar so... help me out please. Measurements are as followed Wheelbase: Short 1005mm, Long 1025mm Chainstay Length: 362mm BB Rise: 50mm Head Angle: 71.5 degrees Centre of BB shell to top centre of head tube: 595mm (23.5") Cheers Oz