InMotion WT387AS Wheel Bearing - Front Inner, Rear or Rear Inner

Wheel Bearing for Heavy-Duty Rear Axles

The InMotion WT387AS is a taper wheel bearing built for rear inner applications across a wide range of trucks, vans, and SUVs. With a cylindrical profile, Gen 1 bearing generation, and a 2.25 in. (57.2 mm) inside diameter, it is sized for demanding driveline and axle service where smooth rotation and reduced friction matter.

Compatible With Ford F-350 Super Duty, Chevrolet Express 2500, GMC Savana 3500, and other rear inner applications listed below, this bearing is a direct-fit service part for many full-floating and heavy-duty axle setups. The WT387AS is also a fitment match for select Mercedes-Benz rear applications with a 198 mm ring gear.

Key Features

• Wheel bearing for rear inner axle service
• Taper bearing design for stable rotational support
• Gen 1 bearing generation
• Inside diameter: 2.25 in. / 57.2 mm
• Width: 0.864 in. / 21.9 mm
• Cone radius: 0.2 in. / 5.1 mm
• Built from high-quality materials for durability in automotive and industrial use
• Part number: WT387AS

Detailed Description

InMotion WT387AS is engineered as a universal-style taper wheel bearing for rear inner positions on a broad range of vehicles and axle configurations. Its dimensions and bearing geometry support consistent wheel-end operation, helping maintain smooth axle rotation and dependable load handling in service environments that demand long-term durability. This part number, WT387AS, is commonly searched for heavy-duty rear axle repair on Ford E-350 Super Duty, Chevrolet Silverado 2500 HD, and GMC Sierra 2500 HD applications.

This part cross-references Timken SET45 for the same application.

What It Helps Address

• Wheel-end noise from worn rear inner bearings
• Excessive play or looseness at the axle hub
• Rough rotation caused by bearing wear or contamination
• Reduced stability in heavy-load rear axle service
• Service needs on full-floating and heavy-duty rear axle assemblies

Installation Notes and Fitment

Install this bearing only in the rear inner position listed for your vehicle and axle configuration. Confirm axle type, ring gear size, and rear wheel setup before ordering, since fitment varies by model and trim. For example, Fits 2018-2022 Ford F-350 Super Duty, rear inner with Single Rear Wheels (SRW); Fits 2017-2018 Chevrolet Express 2500, rear inner with Single Rear Wheels (SRW); Fits 2011-2018 Chevrolet Silverado 2500 HD, rear with 10.5in Ring Gear; Fits 1999-2016 Ford F-350 Super Duty, rear inner with Dual Rear Wheels (DRW); Fits 2003-2012 Chevrolet Express 3500, rear inner with Single Rear Wheels (SRW).

• Fits 2021-2023 Ford E-350 Super Duty, rear inner with Full Floating Rear Axle
• Fits 2019 Ford E-350 Super Duty, rear inner with Full Floating Rear Axle
• Fits 2018-2022 Ford F-350 Super Duty, rear inner with Single Rear Wheels (SRW)
• Fits 2017-2018 Chevrolet Express 2500, rear inner with Single Rear Wheels (SRW)
• Fits 2017-2018 Chevrolet Express 3500, rear inner with Single Rear Wheels (SRW)
• Fits 2003-2012 Chevrolet Express 3500, rear inner with Single Rear Wheels (SRW)
• Fits 2011-2018 Chevrolet Silverado 2500 HD, rear with 10.5in Ring Gear
• Fits 2015-2018 Ford E-350 Super Duty, rear inner
• Fits 2015-2018 Ford Transit-150, rear inner
• Fits 2015-2018 Ford Transit-250, rear inner
• Fits 2015-2018 Ford Transit-350, rear inner
• Fits 2015-2018 Ford Transit-350 HD, rear inner
• Fits 2017-2018 GMC Savana 2500, rear inner with Single Rear Wheels (SRW)
• Fits 2003-2018 GMC Savana 3500, rear inner with Single Rear Wheels (SRW)
• Fits 2011-2018 GMC Sierra 2500 HD, rear with 10.5in Ring Gear
• Fits 2011-2016 Chevrolet Express 2500, rear with 10.5in Ring Gear
• Fits 2003-2010 Ford E-350 Super Duty, rear inner with Full-Floating
• Fits 2001-2010 Chevrolet Silverado 2500 HD, rear inner
• Fits 1999-2016 Ford F-350 Super Duty, rear inner with Dual Rear Wheels (DRW)
• Fits 1999-2004 Chevrolet Silverado 2500, rear inner with 10.5in Ring Gear
• Fits 1998-2005 Mercedes-Benz CL500, rear with 198mm Ring Gear
• Fits 1994-2005 Mercedes-Benz S500, rear with 198mm Ring Gear

Quality Assurance

InMotion manufactures this bearing from high-quality materials for use in automotive and industrial environments where consistent rotation and durability are required. The WT387AS is specified with published dimensions and fitment data to support accurate parts selection for rear axle service.