By 1/4 and also 5/8. I saw the info in a thread sometime ago, but can't seem to find it again. Thanks for the help. Edit: I found that it was 25 units/quarter inch. How about balance and weight changes?

Each 0.5" will decrease SW by 16-20 units for most racquets. This range will cover 90% of the racquets out there. It can easily be calculated more closely with the parallel axis theorem: SW' = SW + M(x^2 + 20x - 2Rx) SW' = new swingweight SW = startign swingweight M = racquet mass (in kg) x = amount shortened (in cm) R = starting balance (in cm) For a 27" racquet starting with 11.2 oz. (0.317kg), 13" balance (33cm), and 330 SW, the new swingweight after shortening to 26.5" (x = 0.5"*2.54 = 1.27cm) will be about 312 (reduced by 18 kg-cm^2). The heavier the starting weight, the more the SW will change.