O’Neal Sinner knee guards review

Comfy protection

Our rating 
3.0 out of 5 star rating 3.0
GBP £59.99 RRP | USD $89.99
O'neal sinner knee guards

Our review

We wouldn't recommend them for trail riding, but they offer great, lightweight, soft protection for downhill, dirt jumping or freeride
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For a while, d3o’s shock absorbing material appeared to have a monopoly on ride protection, until O’Neal crashed the party. Their new Sinner pads utilise SaS-Tec’s SC1 viscoelastic soft foam inserts. This material remains pliable in general use, but hardens proportionally with the force of an impact.


Soft construction means they’re pedal-friendly and the towelling lining means they don’t chafe sweaty knees. Ours were snug and comfortable, but try before you buy if you have big legs.

The SaS-Tec material isn’t anywhere near as pliable as d3o and is considerably thicker, so you don’t forget you’re wearing them like you do with 661s EVO pads. The hammer-on-knee test did prove that they give significantly more impact protection than the 661 pad though.


They have additional foam pads to protect the side of the knee, and the cupped shape of the knee insert means they stay in place well when scuffing yourself across the floor.

Product Specifications


Name Sinner Knee Guards (10)
Brand O'Neal

Sizes Available L M S
Features * SaS-Tec memory foam system * Absorbs approximately 50% more impact than traditional hard plastic * Intelligent Memory foam is soft and pliable until impact, when the foam hardens at a rate relative to the intensity of the impact * Soft and comfortable * Lightweight * Removable foam pads for easy cleaning