High precision, custom grease fill, cartridge bearing units for servicing e*thirteen hubs.

Need help figuring out what size your hub requires? All bearings we use have the size shown on the bearing seal. Alternatively, see these support articles which will help you determine what bearing size you need:

• Check which bearings your front hub needs by clicking here
• Check which bearings your rear hub needs by clicking here

Here are the bearing sizes found in our most common hubs: The below list covers some common hub models and bearing specs for reference. Please note that SL Race, Race, and Race SL refers to different models/generations of hubs and bearing spec does vary in many cases.

Front Hubs:

• 6803 – Fits drive and disc side 2024+ model year Race SL Hubs found on new Sylvan and Optimus Wheels; XCX MTN front hubs
  
• 6804 – Some TRS front hubs from 2019-2021
  
• 6805 – Fits most Grappler, TRS, LG1 and SL front hubs; some past generation legacy front hubs
  
• 6902 – Drive and disc side XCX Gravel Hubs found in both XCX Race Carbon and Alloy Gravel Wheels

Rear Hubs:

• 6804 – Drive and disc side 2024+ model year Race Hubs found in new Grappler E*Spec Wheels; Drive side TRS/LG1 Carbon Shell; Drive & disc side 2014-2018 TRS/LG1 Plus rear hubs
• 6902 – Drive and disc side 2024+ model year Race SL Hubs found in new Sylvan and Optimus Wheels; Drive and disc side XCX Gravel Hubs found in both XCX Race Carbon and Alloy Gravel Wheels; Non-drive side TRS/LG1 carbon shell rear hubs
  
• 6903 – Drive and disc side 2024+ model year Race Hubs found in new Grappler Enduro and Downhill Wheels; Drive and disc side SL Race Hubs found on 2018 TRS Race SL and 2018-2023 TRS and LG1 wheels

When in doubt, inspect the bearing size marked on your existing bearing seal! If you’re still not clear on what you need, drop us a line here with a photo of your hub and we can assist.