As far as quality of material….it is tempered steel, just 4 inches taller. Yes there is some flex, but I feel this is a non issue…

The danger to me is the butt chock being so low someone flips over the back…having said that…no there has been no testing on the riser…I tested it on MY WIFE……she is fine….I have quite a few out there and not one complaint...Riding Motorcycles is Dangerous!!! However, if you purchase one and are not satisfied I will reimburse your money …. Period!