Alpinestars Nucleon KR-1 Back Protector ::

Alpinestars Nucleon KR-1 Back Protector

  • Nucleon KR-1 hybrid back protector incorporates race-oriented back protection
  • CE certified Level 2 (EN1621-2:2014)
  • Featuring hard-shell vertebrae protection and high energy absorbing viscoelastic memory foam for uncompromising safety and performance
  • Ergonomically profiled for sport riding
  • Superb ventilation
  • Waist adjustment for customized fit
  • Extremely lightweight and breathable

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Sizing Information

These back protectors are sold by your body height and here are the recommendations from Alpinestars:

Product Size Height Range
XS 4’8 3/4” – 5’4 1/2”
S 5’4 1/2” – 5’8”
M 5’8” – 5’11 3/4”
L 5’11 3/4” – 6’2 1/8”
XL 6’2 1/8” – 6’4 1/2”

Overall height varies by size, but just to give you the idea, you can click the “View Larges Images” link above to see our custom pics. Those photos were taken with the size medium back protector and our model is 5’9”.

Our Two Cents

For 2015, Alpinestars is introducing an all-new line of back and chest protection, and these are all part of the Nucleon series.

This Nucleon KR-1 is made of a flexible and pliable base material with a much firmer stiffener piece overlaid on the back. It is intended for racing where the highest level of protection is needed. This unit provides CE Level 2 protection.

Just for reference, Alpinestars also offers the KR-2 and KR-R protectors. The KR-2 is similar to this one, and has the same pliable base material but does not have the stiffener, and will be more comfortable for long term use and is more suited to touring or adventure riding. The KR-R is very similar to this one, with the race stiffener and all, but it attaches to an Alpinestars suit (and some jackets) with the snap near the neck.

This back protector is worn on the body with a waist strap and shoulder straps and is not dependent upon snaps or other connections in Alpinestars gear.

Accessories: You can beef up the protection of this back protector by adding either a Nucleon Chest Protector Harness and/or a Tailbone Protector (see those links below).

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