i got sk-d board link https://i-wonder.en.alibaba.com/product/60455933468-803166455/Certified_I_WONDER_Boosted_SK_D_Electric_Skateboard_With_Dual_Motor_1200W_2_DC_Brushless_With_Hall_Sensor.html So i want to increasing the speed so -what wheels size do i need to replace -How many pulley teeth ? thankyou