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Alpinestars Nucleon series protectors represent the latest innovations from arguably one of the most experienced motorcycle gear companies around. Each component is carefully engineered to work with all Alpinestars equipment, from street jackets to full one-piece leather suits. If you’re a safety-minded rider, it would be hard to find better equipment to protect your body on the road or at the track.

If you’re after a back protector with CE Level 2 protection, exceptional comfort that’s fixed in place around the waist only, the Alpinestars Nucleon KR-R back protector fits the bill. It’s designed using the same overall design as the Nucleon KR-3 and Nucleon KR-1 protectors, but without the shoulder straps, which makes it a good choice for someone that’s only wearing this under a leather suit or a well-fitted riding jacket.

The KR-R’s outer shell (white portion in the photos), is a hard, yet flexible affair which imparts a significant degree of load dispersion to the soft core beneath. It’s this soft core that does most of the work, reducing energy transfer between the road you’ve just hit and your spine. And because the whole device shapes itself against the contours of your back thanks to your body’s heat, impact forces are projected over the largest possible area, which is a good thing!

MSRP $149.95

For expert sizing guidance, call TJ on 866.931.6644 ext. 817, send a note to [email protected], or just shoot us a PM and we’ll get back to you right away.


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