If you empty the -ve chamber and then measure you’ll have better idea when measuring
I believe the axle-crown distance is not a straight line, but the vertical element (Where the horizontal element would be a combination of all the forward offsets (crown, dropouts)
I could well be wrong of course, that is merely my perception, I’ve not read anything anywhere on this
IIRC the A-C of revs should be:
06-08 Rev dual-air/dual-air U-turn/coil U-turn @ 130mm = 508mm
[dual-air min* of 115mm would be 493mm]
09 Rev dual-air/dual-air U-turn QR @ 140mm = 521mm
[dual-air min* of 125mm would be 506mm]
09 Rev dual-air/dual-air U-turn 20mm(big fat pike lowers) @ 140mm = 518mm
[dual-air min* of 125mm would be 503mm]
10/11 (bulged lowers) Rev dual-air/dual-air U-turn/dual position air? @ 150mm = 528mm
[dual-air min* of 130mm would be 508mm]
*I’m a bit confused by the stated minimum travel spacerable on dual-air Revs, after all the dual-air U-turn models all go lower. It might just be they only sell single piece travel spacers down to those travels, probably not to overlap with the reba ..