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Rock-Tek Tire Weight System: 1.9 Crawler Wheels (2)
Brand: ProLine
Part No: PRO647900
Out Of Stock
Request Stock NotificationThe Pro-Line Rock-Tek Tire Weight System (PRO647900) is a magnetically locked, bearing-supported solution that places mass at bottom-dead-centre inside the tyre. By keeping weight effectively stationary relative to the chassis, it lowers the centre of gravity without the rotating mass penalty of traditional brass wheel weights, improving climbing stability, side-hill confidence and throttle response.
Key Features
- Maximum CG per gram by positioning weight at bottom-dead-centre inside the tyre.
- Bearing-supported design reduces rotating mass and driveline strain versus fully rotating brass systems.
- Magnetic coupling stabilises the weight for climbs and side-hilling; can also be run without magnets to free-spin and self-position by gravity.
- Tunable performance with a 208g base assembly and optional two 54g brass add-ons (part PRO647902) for precise balance and traction.
- Hidden, scale-correct integration fully contained within standard 1.9 inch beadlock wheels.
Suggested Compatibility & Fitment
- Designed for standard 1.9 inch crawler tyres with 4.75–4.9 inch outer diameter.
- Suggested compatibility includes most standard 1.9 inch beadlock wheels; also suggested compatibility with Pro-Line 1.9 inch beadlock wheels and crawler tyres.
- Includes mounting hardware for Axial SCX10 III and Traxxas TRX-4 front knuckles and can be adapted to many other crawler platforms.
- For best results and to confirm wheel clearance, refer to Rock-Tek engineering drawings and fitment guidelines prior to installation.
Tuning Options
- Run with magnetic coupling engaged to keep mass locked at bottom-dead-centre for maximum stability.
- Alternatively, remove the external magnets to allow free-spin operation while still maintaining most low-CG benefits.
Elevate your competition or advanced trail build with smarter weight control and a cleaner scale appearance, all while retaining the responsiveness your rig deserves. Part number: PRO647900.
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Rock crawling has always been a fight against physics. The lower your center of gravity the more stable your rig stays. For years the approach was the same: add brass and accept the trade-offs. Static wheel weights spin at full RPM, piling on rotating mass, stressing the driveline, and dulling throttle response. Chassis weights sit too high to make a real difference, and knuckle weights add bulk without delivering the lowest possible CG. The industry has been stacking weight and hoping for the best.
Rock-Tek changes that completely.
Rock-Tek is the first magnetically locked, bearing-supported tire weight system that keeps mass planted at bottom-dead-center while the tire rotates around it. This keeps the weight effectively stationary relative to the chassis, maximizing CG reduction without the rotating mass penalty of traditional wheel weights. Instead of spinning dead mass, Rock-Tek controls weight dynamics to improve climbing stability and balance.
Rock-Tek is designed for standard 1.9" crawler tires with a 4.75"-4.9" outer diameter and integrates cleanly into serious crawler builds without adding external bulk or compromising scale appearance. The system is engineered to work with most standard 1.9" beadlock wheels and is fully compatible with Pro-Line 1.9" beadlock wheels and crawler tires. For best results and to confirm wheel clearance, users should reference the Rock-Tek engineering drawings and fitment guidelines prior to installation.
If you are serious about climbing performance, side-hill stability, and smarter weight tuning, Rock-Tek is the upgrade your crawler has been waiting for. This is not another brass ring. It is the most advanced crawler weight system ever developed.
Rock-Tek positions weight at bottom-dead-center inside the tire, delivering the greatest center-of-gravity reduction per gram added compared to traditional chassis, axle, or static wheel weights.
A bearing-supported internal design allows the mass to remain effectively non-rotational relative to the chassis, minimizing rotational inertia and reducing driveline strain compared to fully rotating brass systems.
Magnetic coupling keeps the weight stabilized at bottom-dead-center during climbs and side hills for maximum stability. The kit includes mounting hardware for SCX10 III and TRX-4 front knuckles and can be easily adapted to many other crawler platforms. Rock-Tek can also be run without the magnet, allowing the weight to free-spin and self-position with gravity, while still outperforming traditional fixed brass weight setups.
With a 208g base assembly and optional addition of two 54g brass weights (PRO647902), Rock-Tek allows precise performance tuning for competition or advanced trail builds. The system can operate with magnetic coupling engaged to stabilize the weight at bottom-dead-center, or without the external magnets for free-spin operation while still maintaining most of its low-CG performance advantage. This gives drivers the flexibility to tune how the system behaves based on terrain, driving style, and setup preference.
Fully contained inside standard 1.9" beadlock wheels, Rock-Tek preserves clean axle and knuckle aesthetics without altering track width or adding external brass clutter.
Key Info:
- Brand: ProLine
- Part No: PRO647900
- Barcode: 0660132670160
- Fitment: Standard Part
Additional Categories:
Standard Shipping
£3.95 to most of the UK
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£6.95 to most of the UK
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