Alpinestars RK-1 Plasma Knee Brace - Black Red

Alpinestars RK-1 Plasma Knee Brace in Black and Red for Off-Road Motorcycle Riding

Get dedicated knee support and impact protection for off-road riding with the Alpinestars RK-1 Plasma Knee Brace. Designed to follow the natural movement of the knee, this lightweight brace combines a flexible hybrid frame, an integrated Nucleon PLASMA protector and an articulated hinge system for support during dynamic riding.

The brace features a three-segment knee cup with a polyurethane outer shell and Nucleon PLASMA impact-absorbing material underneath. Its self-centering design and upper and lower patella extensions provide coverage across different knee positions, while the ventilated structure supports airflow during demanding rides.

A slim four-point hinge system follows knee articulation, and adjustable extension stops let you set the maximum opening angle between 0 and 30 degrees. Four individual straps with non-slip backing help maintain positioning, while flexible, high-strength buckles and soft-touch padding support comfort and a secure fit.

Available in Black/Red and in S/M or L/XL sizing, the Alpinestars RK-1 Plasma Knee Brace is designed for motocross and other off-road riding applications. The product is supplied as a pair, allowing you to fit both knees with the same protective system.

Compatibility and Sizing

• Product Fit: Designed to fit the rider's knee and leg using the appropriate brace size.
• Available Size Options: S/M and L/XL.
• Colour: Black/Red.
• Fitment Guidance: Consult the official Alpinestars RK-1 Plasma size chart and fitting guide before choosing a size.

Recommended Use

• Motocross: Provides knee support and certified impact protection for off-road riding.
• Trail Riding: The articulated hinge and flexible frame are designed to accommodate knee movement on trails.
• Adventure Off-Road Riding: Suitable for riders who require dedicated knee protection when riding off paved roads.
• Repeated Riding Sessions: Adjustable straps and replaceable padding support fit customisation for regular use.

Fitting, Adjustment and Maintenance

• Read the Alpinestars user guide and follow its fitting instructions before riding.
• Choose the correct size and position the knee cup according to the manufacturer's fitting guidance.
• Adjust the four straps evenly and secure all buckles before riding.
• Set the extension stops according to the user guide and your intended fit. Do not exceed the available adjustment range.
• Check that the hinge moves freely and that the brace remains correctly positioned during knee flexion.
• Clean the brace and padding according to the manufacturer's care instructions.
• Inspect the frame, knee cups, hinges, straps and buckles regularly for wear or damage.
• Replace worn or damaged components with compatible Alpinestars replacement parts.

Safety Information

• Use the correct size and follow the official fitting instructions.
• Ensure the knee cup is properly centred and all straps are secure before riding.
• Inspect the brace before each ride and do not use damaged protective equipment.
• CE Level 1 certification applies to the knee protector under EN 1621-1:2012. It does not guarantee prevention of injury.
• This product is protective riding equipment, not a medical brace intended to diagnose or treat a knee condition.