i use 27.5 in the front and 22 in the rear for large outdoor tracks with ae oils. for my track im geared 28 p 75 s. this is with a 17.5 novak with no timing at all. i run no shock/ spacer things in my shocks at all. this way i can get as much drop as possible. arms leveled in the front. use bones level for the rear and i take first a lot when i race it. cant remember my shock postilion but i think im for the front im in the second hole on tower and outer hole on arm. for the rear i think im on the outter hole on the tower and outer hole on the arm. spring what ever came with the ft kit i think red front gray rear. with number 2 piston i think. truck hanldles great for my driving style which is a little on the power side in turns. but if you yank the trigger the back end will kick out easy.