Why does the new BoXXer have 38mm upper tubes? We wanted to create the best downhill fork on the market, looking at all aspects of the system. We found that the 38mm chassis provided the best balance of stiffness and performance. Related articles What is the range of adjustability on Charger 3 RC2? Does BoXXer feature PRV’s? Why are there lines on BoXXer’s upper tubes? What are the features of BoXXer’s new crowns? Is the Charger Race Day 2 damper backwards‑compatible?