I ran my TT-02 with 100 weight in the front and 80 in the rear. Worked really well on the asphalt parking lot we were racing on. I know that may sound kind of thick to some, but plastic shock have so much oil that blows by the piston you need to go thicker than you would with their better TRF shocks or something like that. The oil also thins out in warm or hot track conditions. Silicone oil tends to vary greatly in viscosity depending on temperature.