Box One Stem Spacers Kit number plates these are also a requirement

these are also a requirement for USABMX Nationals

and a cold-forged aluminum alloy head gives the Box Two™ Seatpost a superb strength to weight ratio

custom titanium-nitride-coated titanium spindles and carbon fiber center seals

Keep in mind

stack the spacers so the vertical supports are in alignment

Box One Stem Spacers Kit number plates these are also a requirementExtruded and CNC machined from 6061 T6 aluminum, Box One Stem Spacers feature an ultra minimalist design that is super lightweight. Weights range from 0. 02 to 0. 14 ounces (0. 56 to 4 grams), depending on the size. Sold in packs of five, each set provides spacing adjustments from 1 to 20 millimeters. Available in anodized red, blue, and black to fit 1 and 1 1 8 forks. For the best performance, stack the spacers so the vertical supports are in