RockShox Upper Crown for Boxxer D1

No, this specific upper crown is designed exclusively for the Boxxer D1 platform introduced in 2024. It will not fit older Boxxer forks due to differences in chassis design and stanchion diameter.

The 44mm offset is a critical geometry specification that influences your bike's handling and stability. It is designed to provide the specific trail and steering feel intended for the Boxxer D1, ensuring the front end remains responsive and predictable on technical terrain.

While it is a straightforward mechanical swap, replacing an upper crown requires specific tools and precise torque settings to ensure rider safety. If you are not comfortable working with suspension components or lack a torque wrench, we recommend having a professional mechanic perform the installation.

This product is the upper crown component itself. It does not typically include the pinch bolts or other mounting hardware, so you should retain your existing hardware or source replacements if your current bolts are damaged.

You should replace your upper crown if you notice signs of fatigue, such as hairline cracks, or if the pinch bolt threads have been stripped from over-tightening. It is also a necessary replacement if you have been involved in a crash that may have compromised the structural alignment of the fork.