... 4-28 6/8/10/12 TT13.6-28 6/8/10/12 TT18.4-30 6/8/10/12 TT18.4- ... too.2.When max speed 30km/h,max load 100%;When speed 25km/h,load increase 15%;When speed 20km/h,load ... increase 35%;When speed 10km/h,load increase ... 50%;When speed 35km/h,load reduce 10%;When speed 40km/h,load reduce ...