Originally Posted by mongol777

My 853 is green, 55cm: from the center of BB to where axle would seat if you slam the wheel - ~400 mm, may be a bit more (crank is on so hard to make accurate measurement)
Regular one is 52 cm and measures around 410mm

853 feels a bit more snappy but regular is no slouch. 853 can be build up under 20 fairly cheap, i had mine around 19 at some point