Headset Bearings

The only information I could find on the 2016 Fuji SL 2.3 has it listed using "FSA, 1 1/8"" upper - 1 1/2" lower, integrated". The lower bearing is a 52mm but has either 36°x45° or 45°x45° bearing contact angles depending on the fork being used. If your fork is using a pressfit crown race its likely a 36°x45° bearing. If the fork is using an integrated crown race (molded into the carbon) it's likely a 45°x45° bearing.

The top is either a 41mm bearing or 42mm since these are both "1-1/8" integrated" headsets. Fuji does not specify which one they used... if it's a 42mm bearing it's like a 45°x45° contact angle bearing.

Bearing sizes and contact angles are often laser etched into the side of the bearing so you can start by checking your current bearings...

If this is confusing or you are not sure, visit your local bike shop and they can help you determine what bearings you need.

For 52mm bearings you can choose from...

Zinc coated Zn40 bearings: BAA1055

Hellbender Stainless Steel bearings: BAA1132

Hellbender-Lite Alloy/Steel bearings: BAA2153A

We’re missing some info here
Is it 36x45 or 45x45 degrees?
Thx

It appears your Langster uses an IS42 top headset and IS49 lower headset. We only offer the Top IS42 and you'll need to call Specialized for the lower IS49 since this is a Specialized only part...