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Alpinestars RK-1 Plasma Knee Brace

Name: Alpinestars RK-1 Plasma Knee Brace
Brand: Alpinestars
SKU: 482-00074L
Price: 299.95 USD
Availability: InStock

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.

AlpinestarsSKU: 482-00074L

Size: Large/X-Large

Color: Black/Red

Variant

Price:

$299.95

Quantity:

Fast Delivery

Shipped in 10 Business Days

Family-Owned

Real people

Authorized Dealer

100% genuine gear

Hassle Free

30 Days Returns

What You Get (Benefits)

Ride with confidence knowing you're protected by premium safety gear engineered to absorb impacts and prevent injuries during crashes and roost encounters.
Shield vital organs and comprehensive body armor systems that cover shoulders, elbows, back, and ribs.

Full Specifications

Safety Certifications DOT (FMVSS 218) + ECE – Dual Certified

Size Chart & Fit Guide

Protection gear must fit properly to work effectively. Chest protectors should cover vital areas without restricting arm movement. Neck braces need correct sizing to work with your helmet. Knee braces require precise measurements to provide support without circulation restriction. Always check compatibility between helmet, neck brace, and chest protector.

Shipping & Returns

Shipping: Free standard shipping on orders $79+ (exclusions may apply to oversized items, tires, Alaska/Hawaii orders, and other select products). Most orders ship within 24 hours on business days, with standard delivery typically taking 3–5 business days.
Returns: Returns are accepted within 30 days of delivery. Items must be new, unused, clean, undamaged, and returned with their original packaging and included materials.
Non-Returnable Items: Opened chemicals/aerosols, undergarments, tires and tire/wheel kits, opened electronics, filled fuel/liquid containers, Camso track systems, and closeout items are not eligible for return.
Return Shipping: Customers are responsible for return shipping costs unless otherwise stated. A prepaid return label may be available for $7.99 on eligible returns.
Full Policies: For complete details, exclusions, and instructions, please see our Shipping Policy and Return Policy

★ ★ ★ ★ ★

50,000+ RIDERS CAN'T BE WRONG

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★ ★ ★ ★ ★

"“Ordered the Fly Racing F-16 combo. Jersey and pants matched perfectly straight out of the box, shipped in 2 days. Wore them on the track Saturday. This is the easiest gear purchase I’ve ever made.”"

Gregory Cliff Verified Buyer

Motocross Rider · Arizona

★ ★ ★ ★ ★

"“I was nervous about sizing — gear is expensive and I didn’t want to be stuck with the wrong fit. The size guide was actually accurate. Returned nothing. Best online gear shop I’ve used in 8 years of riding.”"

Sara M. Verified Buyer

Trail Rider · Oregon

★ ★ ★ ★ ★

"“Ordered my snowmobile kit — FXR jacket, bibs, and a 509 helmet. All matched perfectly, all arrived in 3 days before the season started. The family-owned vibe is real. Got a handwritten note in the box. That doesn’t happen with Amazon.”"

Tyler B. Verified Buyer

Snowmobile Rider · Montana

★ ★ ★ ★ ★

"Ordered the Fly Racing F-16 combo. Jersey and pants matched perfectly straight out of the box, shipped in 2 days. Wore them on the track Saturday. This is the easiest gear purchase I've ever made."

Gregory Cliff Verified Buyer

Motocross Rider · Arizona

★ ★ ★ ★ ★

"I was nervous about sizing — gear is expensive and I didn't want to be stuck with the wrong fit. The size guide was actually accurate. Returned nothing. Best online gear shop I've used in 8 years of riding."

Sara M. Verified Buyer

Trail Rider · Oregon

★ ★ ★ ★ ★

"Ordered my snowmobile kit — FXR jacket, bibs, and a 509 helmet. All matched perfectly, all arrived in 3 days before the season started. The family-owned vibe is real. Got a handwritten note in the box. That doesn't happen with Amazon."

Tyler B. Verified Buyer

Snowmobile Rider · Montana

Protection you can trust

Advanced safety design built to keep you secure on every ride.

Engineered for every terrain

Built to perform from rugged trails to open roads.

Ready for any condition

Comfort and durability that adapts to changing weather.

GOT QUESTIONS? WE'VE GOT ANSWERS.

VIEW MORE FAQS

What size should I order? Does this helmet run true to size?

The Trekker Conceal generally runs true to size, but riders with wider heads report going up half a size. Use our helmet size chart — measure your head circumference in cm and match it to the chart. If you're between sizes, size up. If it still doesn't fit, our 30-day returns mean no stress.

Will my goggles fit this helmet? Which brands are compatible?

It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

Can I use this helmet for snowmobiling?

We use all major carriers, and local courier partners. You’ll be asked to select a delivery method during checkout.

Can I get it before the weekend?

We always aim for make sure our customers love our products, but if you do need to return an order, we’re happy to help. Just email us directly and we’ll take you through the process.

What's your return policy if it doesn't fit?

It depends on the creator and the product. All options are outlined on the product page, so look out for customization options there.