Box One Delta 31.8mm Big Bore Stem Color:Blue There are two wheel sizes

There are two wheel sizes in the 20″ category – the 20″ on Jr/mini bikes which uses the 451mm diameter wheel in narrow widths (for 20-1/8″ & 20-3/8″ tires)

MAX PSI: 85psi on 1-1/8" and 60psi for the rest

eyeleted construction

32mm offset

5" feature light weight 11 butted tubing made from 4130 chromoly and heat treated for superior strength

Box One Delta 31.8mm Big Bore Stem Color:Blue There are two wheel sizesThe Box Delta 31. 8mm Big Bore Stem is designed specifically for BMX racing. It pairs well with Box's Jet, Triple Taper Alloy, or Box One Chromoly (aka Maximus) handlebars and with them creates one of the stiffest combos around. Putting it all together will allow you to harness and better control your bike, which should translate to faster times. Box, in their never ending quest to design parts that are the stiffest and the lightest have created here