RockShox Upper Crown for Boxxer D1

No, this specific upper crown is engineered exclusively for the Boxxer D1 generation (2024 and newer) with a 38mm chassis. It will not fit previous iterations of the Boxxer fork.

The 52mm offset is designed to maintain the specific handling geometry of the 29-inch Boxxer D1 fork. Changing your offset can alter how the bike tracks through corners and handles at high speeds, so it is best to match the offset recommended for your specific frame and riding style.

This product is the upper crown component itself. You will need to reuse your existing hardware or source the appropriate pinch bolts and top cap assembly separately to complete the installation.

While the crown is physically compatible with the 38mm chassis, it is optimized for the geometry and trail feedback of a 29-inch wheel configuration. Using it on a 27.5-inch setup may negatively impact your bike's intended handling characteristics.

Yes, this is an original equipment manufacturer (OEM) replacement part from RockShox. It is built to the exact factory specifications required to maintain the structural integrity and performance of your suspension system.