Valk I/S Shock Length

[MikeT]

Am getting older and seems like the bike has gotten taller or my legs have gotten shorter.  Anyway I currently have 13" Progressive 412's and would like to go shorter say to 12.5" or 12".  I weigh 250# and ride 2 up 50 % of the time.  Would the shorter length help and how short can I go before I have clearance issues and drastic geometry changes.  Just would feel more comfortable if I can put my feet on the ground more securely at stops and such.
Thanks, Mike T

[RUDE DOG - Steelers]

11.5  is generally the shortest you would want to go.  12 or 12.5 should be fine but you should probably order either length in HD for your weight.