Why are there lines on BoXXer’s upper tubes? BoXXer’s new crown height gradient provides a visual guide to simplify the setup process when positioning the crowns on the upper tubes, no rulers required Related articles Why does the new BoXXer have 38mm upper tubes? What can I upgrade on my 2024 BoXXer to make it more like the BoXXer Ultimate? How do I add ButterCups to my base-level BoXXer? Do RockShox forks have a rider weight limit? Can I run ButterCups on one side only?