Rock-tek wheel weights for 1.9" tires

Rock-Tek Tire Ballast System: 1.9" Crawler Wheels (2) Overview

Rock crawling has always been a battle against physics. The lower the center of gravity, the more stable the vehicle stays. For years, the approach was the same: add brass and accept the downsides. The static weights of the wheels spin at full throttle, accumulating rotating mass, putting stress on the drivetrain, and dampening throttle response. Chassis weights are too high to make a real difference, and joint weights add volume without achieving the lowest possible center of gravity. The industry has limited itself to piling on weight and hoping for the best.

Rock-Tek changes that completely.

Rock-Tek is the first tire counterweight system with magnetic locking and bearing support that keeps the mass fixed at the bottom dead center while the tire spins around it. This effectively keeps the weight stationary relative to the chassis, maximizing the reduction of the center of gravity without the penalty of rotating mass from traditional wheel counterweights. Instead of spinning dead weight, Rock-Tek controls the dynamics of the weight to enhance stability and balance on climbs.

Rock-Tek is designed for standard 1.9" crawler tires with an outer diameter of 4.75"-4.9" and integrates seamlessly into serious crawler builds without adding external volume or compromising scale appearance. The system is designed to work with most standard 1.9" beadlock wheels and is fully compatible with Pro-Line 1.9" beadlock and crawler tires. For best results and to confirm wheel clearance, users should consult Rock-Tek's engineering plans and mounting guidelines before installation.

If you take climbing performance, side hill stability, and smarter weight tuning seriously, Rock-Tek is the upgrade your crawler has been waiting for. This is not just another simple novelty. It is the most advanced ballast system for crawlers ever developed.

First magnetically stabilized tire weight system on the crawler market

Bearing design reduces effective rotating mass

Offers maximum center of gravity reduction per gram

Hidden internal system maintains the vehicle's clean appearance

Adjustable base weight of 208 g, with the option to add two additional weights of 54 g

Maximum center of gravity per gram

Rock-Tek places the weight at the bottom dead center inside the tire, providing the greatest center of gravity reduction per added gram compared to traditional static chassis, axle, or wheel weights.

Reduced rotating mass

An internally supported design with bearings allows the mass to effectively remain non-rotating relative to the chassis, minimizing rotational inertia and reducing stress on the drivetrain compared to fully rotating brass systems.

Magnetic control of the bottom dead center

The magnetic coupling keeps the weight stabilized at the bottom dead center during climbs and on side hills for maximum stability. The kit includes mounting accessories for the front joints of the SCX10 III and the TRX-4, and can be easily adapted to many other crawler platforms. Rock-Tek can also operate without the magnet, allowing the weight to spin freely and position itself thanks to gravity, while still outperforming traditional fixed brass weight setups.

Adjustable performance

With a base set of 208 g and the optional addition of two 54 g brass weights (PRO647902), Rock-Tek allows for precise performance tuning for competition or advanced trail setups. The system can operate with the magnetic coupling activated to stabilize the weight at the bottom dead center, or without the external magnets for free-spinning operation, while still maintaining most of its low center of gravity performance advantage. This offers drivers the flexibility to adjust the system's behavior based on terrain, driving style, and setup preferences.

Hidden and scale integration

Fully integrated into standard 1.9" beadlock wheels, Rock-Tek preserves the clean aesthetics of the axle and joints without altering the track width or adding bulky external brass elements.

Rock-Tek Tire Ballast System: 1.9" Crawler Wheels

Product Specifications

Tire inner diameter / wheel outer diameter: 1.9 inches

Insert material: open cell

Product height: 4.76

Product width: 1.65

Scale 1/10

Tire type: Rock Crawling

Vehicle type: off-road

Wheel position: Front/Rear