Stumped with rear shock length..??????

I,ve run Q-A1 12 way adjustables with my Caltracs.Right now I,m running the 9 way adjustables from Calvert(Sellers of Caltracs).The Q-A1,s are about 1 inch longer.

you could always install a forged set of 1" spacers on the springs, that would give you a little peace of mind about bottoming out.