With so many foam inserts on the market these days and every brand having a performance story, how do you decide which is right for you. One of the ways we test Flat Tire Defender is a simple hammer impact test that virtually any consumer can duplicate. Yes, we do perform laboratory test using high tech equipment but we’ve found laboratory test do not always correlate to ‘real world’ conditions. Also, our rider survey’s have shown they primarily buy foam inserts as a way to protect rims. Yes, this is important but Flat Tire Defender does so much more. In the video you’ll notice when the hammer hits the foam it makes a different sound. Pay attention to the sound of FTD II. You’ll notice it’s much quieter. This correlates to how the foam absorbs wheel impact and rebounds quickly for the next impact. And how the FTD II material looks after impact. Enjoy the ride!