FRAME Frame Sizing Chart Mini Junior Expert Expert XL Pro / Jr Pro Pro XL Pro XXL Rider Weight 40-65 lbs 60-75lbs 70-95 lbs 75-110 lbs 100 & Up 140 & Up 160 & Up Rider Height 3' 10" - 4' 8" 4' 4" - 4' 9" 4' 6" - 5' 2" 4' 10" - 5' 4" 5' - 5' 8" 5' 8" - 6' 5' 10" + Frame Length 16 - 17.5" 17.5 - 18.5" 19.25 - 20" 19.5 - 20" 20 - 20.5" 21 - 21.5" 21.5 - 22" Crank Length 145-155mm 155-165mm 165-170mm 170-175mm 175-180mm 180-182mm 180-185mm Stem Size Mini Mini/Mini XL Expert/Pro Expert/Pro Pro Pro/XL Pro XL/XXL Handle Bar Size 2-2.5" 4-5.5" 5-6.5" 6-7.25" 7-8" 7.5-8" 8-8.5"