Alpinestars RK-1 Plasma Knee Braces — Black/Red — L/XL · L/XL

• Anatomically profiled for all forms of off-road riding, the RK-1 Plasma Knee Brace has been engineered to provide comfortable knee support while still being lightweight, breathable, and protective
• This knee brace features a Nucleon Plasma knee protector encased in an innovative hybrid frame construction, consisting of a flexible composite over-injected on a high-performance polymer blend to offer superb frame rigidity while still being flexible at the upper and lower strap areas
• Key Features
• This brace provides optimal structural integrity and support while being ultra-lightweight and adaptive, and thus reduces the risk of sustaining injuries to the medial and lateral collateral ligament, the anterior and posterior cruciate ligament, and the lateral and medial meniscus
• The replaceable triple segmented knee cups are constructed with a polyurethane outer shell backed with a Nucleon Plasma protector for the optimum blend of impact protection, flexibility, and scratch resistance
• The self-centering knee cup and the strategically positioned upper and lower patella extensions ensure maximum coverage regardless of the flexion or extension angles
• The stable, slim-design four-point hinge system follows the articulation of the knee while the extension stops, which are available in a range from 0° to 30°, assist in setting the brace to the desired maximum opening angle
• The stainless-steel bushings in the four-point hinge system have an anti-oxidation treatment
• Nucleon Plasma is a viscoelastic material engineered from bio-based polymers and formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies
• Lightweight and highly ventilated, the knee protector offers strong impact force dispersion and absorption while ensuring maximum coverage in all riding positions
• Construction
• Constructed from bio-based eco-friendly and sustainable impact absorbing material
• High tensile strength buckles are robust while still being flexible for easy strapping and adaptivity
• Soft-touch thermoformed padding ensures the highest levels of rider comfort while keeping the knee brace securely in position
• Equipped with four individual straps backed with a non-slip material to ensure the knee brace remains securely in position while riding
• Soft-touch thermoformed condyle padding comes in different thicknesses for a customized fit
• Central buckles are easily locked into the closed position by a keyhole snapping system

Riding Style

Off-Road, ATV, UTV

Size

L/XL

Model

RK-1 Plasma

Size Group

Adult

Color/Finish

Black, Red

Units

Pair

Base Color

Black, Red

Type

Knee

Shipping weight

3.2 lb

Package size

17.5 × 7 × 6.5 in

Country of origin

China

Salto part #

2704-0714

Alpinestars part #

6501725-13-LXL

UPC

8059347428246

In stock at a distributor warehouse. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is re-checked with the warehouse before your card is charged.

Is it in stock?

Yes — the distributor shows it on a shelf at a regional warehouse right now. We check again the moment you order, before anything is charged.

How fast will it get to me?

Usually 2–4 business days by ground.

Will it fit my machine?

The distributor doesn’t publish a vehicle fitment list for this part. Call the counter at 801-361-3010 with your year, make and model and we’ll check it with you before you order.

Is this genuine Alpinestars?

Yes. It ships new from the same distributors the big online stores buy from — Alpinestars part #6501725-13-LXL.