im 5'6-5'7 and rock a 8.5 boot. can i get...
im 5'6-5'7 and rock a 8.5 boot. can i get away with the 148 narrow as my park board? or is their a better choice
depending on the exact foot print of your boot, you could get away with that waist width, especially if you ride with a ducked stance, but depending on your weight, you might want the 51. A little extra width translates into more stability: on rails, in powder, landings...etc...
I'd say if your of average weight for your height, you can rock the 48 and be ok.