I've had 43 and 40 mm offset otherwise identical forks on the same bike, 73.5 HTA, 700 X 23 tires. I could definitely feel the difference but could easily adjust to either. I elected to go with the 40 for slightly more high speed stability but I was fine with the original 43 as well.
Last edited by Al1943; 11-05-14 at 05:33 PM.