RockShox Lower Crown/Steerer for BoXXer D1

No, this specific lower crown and steerer assembly is designed exclusively for the BoXXer D1 platform (2024 and newer). It will not fit older BoXXer forks due to differences in chassis design and stanchion diameter.

Yes, this is a complete assembly that includes the lower crown and the steerer tube, pressed into the 38mm stanchions. It is ready to be installed into your existing fork lowers.

If your current fork has a different offset, changing to this 52mm version will alter your bike's trail measurement and steering feel. It is best to match the offset of your original fork to maintain the handling characteristics intended by your bike's frame geometry.

While it is possible to perform this swap at home with the correct tools, it requires specific knowledge of suspension service and proper torque specifications. If you are not comfortable pressing components or working with high-performance suspension, a professional mechanic is recommended to ensure safety and proper alignment.

Yes, this assembly is designed to accommodate both 27.5 and 29-inch wheel sizes, provided you are using it with the compatible BoXXer D1 fork chassis.