Box One Delta 31.8mm Big Bore Stem Color:Blue 1 1/8" - Standard 1

1 1/8" - Standard 1 1/8th Upper and Lower

Features three compound pads and pivoting posts for precise placement

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)

32mm offset

Box One Delta 31.8mm Big Bore Stem Color:Blue 1 1/8" - Standard 1The 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