Alpinestars
SX1 Plasma Knee Protector Black Red Cool-Gray
Protection - MXSKU AS6500326149884
Variant
Cheapest we found
$162.95
at XPERT Moto Gear
5 recent in-stock prices · spread $17.04 (10%)
Based only on in-stock prices checked in the last 30 days. 5 stores checked; dates for every store are shown below.
Recorded store prices
Prices we recorded when we last checked each store for this exact variant.
Product details
The SX-1 Plasma Knee Protector features a Plasma Knee Protector embedded into a highly ventilated semi-rigid frame construction for superior impact protection, while the integrated Dual Gear System (DGS) promotes the natural articulation of the knee.
KEY FEATURES:
Nucleon Plasma: Features a Nucleon Plasma knee protector that is constructed from a USDA BIOBASED certified viscoelastic material, which is molded into a structure that is pliable in all directions while maintaining the ability to dissipate impact energy.
Dual density co-injected frame for a supportive structure with unrivaled comfort and adaptability: Engineered with a scooped lower extension made from a soft polymeric blend to avoid any pressure points associated with a hard edge from occurring as a result of the boot pushing against the protector.
The same scooped design is also applied to the upper extension, and this prevents the protector digging into the skin and causing discomfort while riding.
Controlled natural movement: DGS – Dual Gear System, both the upper and lower frames have integrated gear profiles that ensure a smooth hinge function to promote the natural articulation of the knee.
The ergonomically sculptured frames of the SX-1 Plasma Knee Protector feature strategically positioned over injected rigid and flexible shells to ensure the frames adapt to a wide variety of leg circumferences.
The Patella System is engineered to offer full coverage of the knee cup regardless of the degree of extension while the rigid outer Patella System shell prevents injuries from handlebar strikes.
KEY FEATURES:
Nucleon Plasma: Features a Nucleon Plasma knee protector that is constructed from a USDA BIOBASED certified viscoelastic material, which is molded into a structure that is pliable in all directions while maintaining the ability to dissipate impact energy.
Dual density co-injected frame for a supportive structure with unrivaled comfort and adaptability: Engineered with a scooped lower extension made from a soft polymeric blend to avoid any pressure points associated with a hard edge from occurring as a result of the boot pushing against the protector.
The same scooped design is also applied to the upper extension, and this prevents the protector digging into the skin and causing discomfort while riding.
Controlled natural movement: DGS – Dual Gear System, both the upper and lower frames have integrated gear profiles that ensure a smooth hinge function to promote the natural articulation of the knee.
The ergonomically sculptured frames of the SX-1 Plasma Knee Protector feature strategically positioned over injected rigid and flexible shells to ensure the frames adapt to a wide variety of leg circumferences.
The Patella System is engineered to offer full coverage of the knee cup regardless of the degree of extension while the rigid outer Patella System shell prevents injuries from handlebar strikes.
PROTECTION:
– Knee protector: EN 1621-1:2012 LEVEL 1
Price history
Recorded changes for this exact variant.
Step chart of dated store-price observations. Solid lines show confirmed crawl coverage, dashed lines show overdue missed-check spans, and every line stops at the last confirmed price.
- 1XPERT Moto Gear7 points · last checked 22 Aug 2026
- 2Everest Motorcycles1 point · last checked 22 Aug 2026
- 3MotoHeaven1 point · last checked 21 Aug 2026
- 4AMA Warehouse1 point · last checked 22 Aug 2026
- 5Cully's Yamaha1 point · last checked 14 Aug 2026
Solid steps show periods confirmed by the store’s change-only price history and completed crawl record: if the price had changed at a check, another point would appear. Dashed steps show overdue periods with no completed crawl confirmation. Every line stops at that listing’s last confirmed check and is never extended to today. Prices are not live and may have changed since the last point shown.
How we collect and compare prices