Sir Tools Wheel Bearing and Hub Assembly Tool

Sir Tools Wheel Bearing & Hub Assembly Tools: Precision Built for Import Specialists

Wheel bearing and hub service is one of the most mechanically demanding jobs in the shop — the wrong tool can damage a spindle assembly, ruin a new bearing, or turn a straightforward job into an all-day ordeal. Sir Tools built its reputation on solving exactly that problem, and their Wheel Bearing and Hub Assembly Tool lineup is the clearest expression of that mission.

Founded by John Sir in 1974, Sir Tools North America has spent decades designing and producing special service tools that meet the real-world needs of automotive technicians worldwide. A family-run company handed down from father to son, Sir Tools has always maintained a strong reputation for manufacturing solid, dependable automotive specialty tools that simply work.

The B90 & B90-BMW: Flagship Wheel Bearing Kits

At the center of the Sir Tools wheel bearing lineup is the iconic B90 Master Wheel Bearing and Hub R&R Kit. This kit is the only equipment designed to accurately and efficiently extract or install hubs and singular wheel bearings of spindle assemblies. What sets it apart from generic pullers is a purpose-engineered design: the B90 incorporates a built-in self-centering mechanism and a roller thrust bearing, allowing it to line up straight as an arrow during removal and reinstallation.

The B90 tackles most front-wheel-drive Asian, European, and some domestic vehicles, and within its exclusive design it is the only unit capable of servicing rear-wheel-drive European vehicles. Applicable rear-wheel-drive vehicles include Mercedes, Porsche, and BMW, while front-wheel-drive coverage spans VW, Audi, Asian, and domestic models.

For shops that specialize in BMW, Sir Tools offers the dedicated B90-BMW variant. Designed to easily remove and install the wheel bearing and hub of spindle assemblies, it is applicable on most every 3, 5, 6, 7, and 8 Series models from the early '80s to present with S.R.W.B. configurations. The durable construction of each tool supports repeated use in demanding workshop environments, and the design promotes efficient, precise operations — minimizing the risk of damage to critical suspension and braking components.

Why Technicians Choose Sir Tools for Bearing & Hub Work

• No hydraulic press required: The B90 supports on-the-car application, saving time and money without the need for a hydraulic press.
• Eliminates improvised methods: The kit is designed to efficiently remove and install hub and wheel bearings, eliminating the need for drastic measures such as a slide hammer or flame torch.
• Pre-assembled sub-kits: Exclusive to Sir Tools, the B90 can be pre-assembled for a specific vehicle application sub-kit if the technician chooses, ensuring it tracks arrow-straight when properly assembled on the vehicle under load.
• Proven track record: The Sir Tools B90 boasts a 20-year service history at thousands of repair shops across the U.S. and around the world.
• Complete package: The kit comes in a sturdy blow-molded case with a complete instruction manual and is backed by a one-year warranty.

Sir Tools is a recognized leader in the development and manufacturing of specialty tools for all imports, especially European makes, offering tools that are high-quality alternatives — and often improvements — over factory tools only available through dealerships. The Sir family manufacturing philosophy is grounded in one simple rule: don't cut corners in order to reduce the cost of the product. For wheel bearing and hub assembly work, that commitment translates directly into tools that professional technicians and serious DIYers can rely on job after job.