6'3 about 270 with gear. Need to re spring my bike for "beginner" MX with a little harescramble enduro thrown in. I'm over 40 and and have no intention of doing triples or any other "big" air. When I video myself (stock springs) obviously the rear tends to dip probably a little much on small doubles and can wallow a bit on fast straightes. I've got a bad knee and will never go big on anything. My question is should I stick with the recommendations of the online calculators or experiment a bit? I notice that while bouncing on the bike sitting still the rear "gives" much more than the front (yes I bleed the air every ride). Do you always change springs in front and rear sets or are there instances where you may just change the rear? Also while I dont have my "sag " numbers handy they fell within what I've found online. Edited March 29, 2013 by Will.A.R.