This F.wheel range is for 19sxf350, adjust for different bikes.
-- F.wheel adjusted for shft tr by divide .90
rider wt	150	160	170	180	190	200	210	220
spr	0.433	0.44	0.448	0.455	0.463	0.47	0.478	0.485
dbl spr	0.865	0.88	0.895	0.91	0.925	0.94	0.955	0.97
2.4"   60	176	178	180	182	186	188	190	192
9.4"  240	748	757	767	776	786	794	804	813
11.8"  300	1144	1158	1172	1184	1199	1212	1227	1239