the later rex is an amazing frame, slack head-angled lower bb coust frame; but bombproof. The older rex, well that's an unknown quantity for a lot of people; around 1040 length, minus 5 bb height and around 390cs i think? I wouldn't recommend this bike for starting though, would be quite a pig on the back wheel for a beginner...zebdi-ish geo i think, okay for a seasoned streety rider though seen the user that bought this bike ends in 1978..same as your birth year; so im going to assume you've bought this...bit pointless me posting the above, but oh well