Associated B6 Gearbox Bulkhead Shim Set for RC10B6 B6D Buggy AS91704

Overview

The Associated B6 Gearbox/Bulkhead Shim Set (AS91704) is an essential tuning accessory for owners of the Team Associated RC10B6 and B6D competition buggies. Whether you're a serious racer looking to dial in your setup or an experienced RC car enthusiast wanting to optimise handling characteristics, this comprehensive shim set expands your front and rear tuning options considerably. The B6 platform is renowned for its precision engineering and competitive capabilities, and these genuine Associated spares allow you to fine-tune critical suspension geometry to suit your driving style, track conditions and personal preferences.

This shim set is particularly valuable for RC competitors and keen hobbyists in the UK who demand precision tuning from their 1/10 scale buggies. By adjusting roll centre, steering feel and drivetrain geometry with the included shims, you can dramatically improve mid-corner performance, steering response and overall vehicle stability. The inclusion of matching hardware ensures a tidy, professional installation without needing to source additional fasteners or components. Whether you're preparing for competition or simply want to get the absolute best performance from your B6 buggy, this shim set represents genuine added value.

As an authorised Associated dealer, RC Model Shop stocks this genuine OEM spare parts accessory, ensuring you receive only authentic components designed to work perfectly with your RC buggy. The AS91704 is stocked in the UK and ready to help you unlock the full tuning potential of your B6 platform.

Key Features

• Front Bulkhead Shims — These precision shims are used between the chassis and front bulkhead to lower the front roll centre of your RC buggy. By lowering the roll centre, the front end becomes more responsive and predictable during cornering, providing a smoother steering response and significantly increasing mid-corner steering feel. This is particularly beneficial for drivers who prefer more direct feedback and earlier turn-in characteristics.
• Rear Bulkhead Shims — Installed between the chassis and rear gearbox, these shims optimise the dogbone angle when running at low ride heights. This ensures that your drivetrain geometry remains correct even when the vehicle is set up with aggressive suspension compression, preventing binding and maintaining smooth power delivery to the wheels.
• Gearbox Shims — The set includes multiple gearbox shims in different sizes (standard and small variants), allowing you to fine-tune the exact positioning of the rear gearbox assembly. This level of adjustment is crucial for getting the optimal mesh between the motor pinion and spur gear, which directly impacts efficiency, noise levels and overall drivetrain performance.
• Chassis Brace Shim — This rear chassis brace shim provides additional tuning flexibility by allowing you to adjust the mounting position of the rear brace, affecting chassis flex characteristics and overall handling balance.
• Multiple Thickness Options — The bulkhead shims are supplied in two different thicknesses (0.5mm and 1.0mm), giving you flexibility to make precise incremental adjustments to roll centre height. This allows you to dial in the perfect setup for your specific driving preferences and track conditions.
• Genuine Associated Hardware — All fasteners included are genuine black-oxide coated screws specifically matched to the B6 platform. You receive M2.5 and M3 socket head cap screws in the correct lengths (6mm, 12mm and 16mm), eliminating the need to source additional hardware separately.
• Competition-Grade Precision — Manufactured to the exact tolerances required by Team Associated racing engineers, these shims ensure that your chassis geometry adjustments are precise and repeatable, critical for competitive racing where consistency is everything.

Technical Performance

The ASSOCIATED B6 GEARBOX/BULKHEAD SHIM SET AS91704 represents the pinnacle of OEM tuning accessories for 1/10 scale off-road buggies. This comprehensive shim set has been engineered by Team Associated specifically for the RC10B6 and B6D platforms, vehicles renowned for their precision engineering and competitive pedigree in UK RC racing circles. The shims themselves are manufactured from precision-cut material to exact tolerances, ensuring that each adjustment produces predictable and measurable changes in vehicle behaviour. The inclusion of gearbox shims in multiple sizes demonstrates the engineering focus on drivetrain optimisation—correct gearbox positioning directly influences the meshing characteristics between the motor pinion and spur gear, affecting efficiency, heat generation and power delivery. The rear bulkhead shims are particularly engineered to address a common tuning challenge when running low ride heights: maintaining proper dogbone angle to prevent drivetrain binding and binding-induced torque steer. The front bulkhead shims allow roll centre adjustment that fundamentally alters how the vehicle weight transfers during cornering, with lower roll centres providing more linear steering response. All fasteners are precision-manufactured black-oxide coated steel, specifically sized and threaded for the B6 platform. The engineering philosophy throughout reflects Team Associated's competition-proven approach to chassis setup, where small adjustments in geometry produce measurable improvements in lap times and handling consistency.

What's in the Box

• 1x Gearbox Shim
• 1x Gearbox Shim, rear
• 1x Small Gearbox Shim, rear
• 1x Chassis Brace Shim, rear
• 1x Bulkhead Shim, 0.5mm
• 1x Bulkhead Shim, 1.0mm
• 2x M2.5 x 0.45 x 6mm FHCS (Flat Head Cap Screw), black
• 6x M3 x 0.5 x 12mm FHCS, black
• 2x M3 x 0.5 x 16mm BHCS (Button Head Cap Screw), black

Frequently Asked Questions

• What vehicles is the Associated B6 Gearbox/Bulkhead Shim Set compatible with? — This genuine OEM accessory is designed specifically for the Team Associated RC10B6 and B6D 1/10 scale competition off-road buggies. These are two of the most competitive and widely-used racing platforms in the UK RC buggy community, so if you own either of these vehicles, this shim set is designed to work seamlessly with your chassis.
• How do the front bulkhead shims improve handling? — The front bulkhead shims lower the roll centre of your RC buggy, which is the point around which the chassis rotates during cornering. A lower roll centre reduces the amount of chassis roll during turns, resulting in more linear and predictable steering response. This means earlier turn-in, more mid-corner steering feel and improved grip through technical sections—exactly what competitive racers in the UK demand from their setups.
• What is dogbone angle and why does it matter? — The dogbone is the suspension component connecting the differential to the rear suspension blocks. The angle at which it sits is critical, particularly when running very low ride heights. If the angle is wrong, it can cause binding and torque steer (unpredictable steering inputs). The rear bulkhead shims allow you to adjust this angle precisely, ensuring smooth power delivery and predictable handling even with aggressive suspension geometry.
• Can I use just one shim, or do I need to use them all? — You can absolutely use individual shims to make specific adjustments. Most racers will start with the front bulkhead shims to adjust roll centre, then progress to the gearbox shims once they've dialled in suspension geometry. The beauty of this set is that you have options—you can make small, incremental adjustments rather than committing to wholesale changes all at once.
• Why are there two different bulkhead shim thicknesses? — The 0.5mm and 1.0mm shims give you precise control over how much you lower the front roll centre. You can use just the 0.5mm for a small adjustment, the 1.0mm for a more aggressive change, or stack them together for even greater adjustment. This granular tuning approach is essential in competitive racing where fractions of a millimetre can be the difference between a winning setup and a mid-field finish.
• Will these shims work on my B6D or only the RC10B6? — These shims are engineered to fit both the RC10B6 and the B6D (also known as the B6D2), as both vehicles share the same fundamental chassis geometry and gearbox/bulkhead mounting points. Whichever Team Associated B6 platform you run, this shim set will work with your vehicle.
• Are the included fasteners the correct specification for the B6? — Yes, absolutely. All fasteners included in this set are genuine Associated hardware manufactured to the exact specifications required by the B6 chassis. The M2.5 and M3 screws in various lengths (6mm, 12mm and 16mm) are precisely matched to their mounting points, so you won't need to source additional fasteners from other suppliers.
• Is this suitable for beginners? — Whilst the shim set is technically straightforward to install—simply place shims between components and secure with the supplied fasteners—the art of using these shims effectively requires some understanding of RC suspension geometry and tuning. This is definitely a product aimed at intermediate to advanced RC racers and enthusiasts who already understand how small chassis adjustments affect handling. Beginners might be better served by learning the fundamentals of their vehicle before adding shim tuning to their toolkit.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the ASSOCIATED B6 GEARBOX/BULKHEAD SHIM SET AS91704 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.