im between two combos firts is a tekin rs 13.5 combo and a lrp sphere 13.5 combo its going in a rc10 t4 any insight would be great

The LRP and Tekin ESC's are some of the best. But the new lrp 13.5 is not out yet. the 13.5's right now to get are Tekin, Orion and novak. I have the LRP Comp with an orion 10.5 and it feels very smooth with plent of rip for my T4. If i was to buy all new I would be leaning towards the tekin RS setup.

You may want to check with your club for racing it seams like the motor setup are 10.5 = 19T and 17.5 = 27T at lease for my area. and roar just set 17.5 as stock equal. just an fyi.

thanks for the insight our club runs 13.5 as stock class and 10.5 as pro stock

YEP TRCR club race stock 17.5 and 13.5