Review on Optimize your Indoor Cycling Experience with the RAD Cycle Products Riser Block for Stationary Bikes and Trainers by John Bourgeois

Very disappointed with this product - when our trainer's instructor made me get up and grind the slide for the first time, my free end broke and collapsed on top of me. My wife, who is a bit lighter than me, managed to break it too, but not by as much. It's a good riser if you're just sitting and don't weigh more than 220 pounds, but if you're using it for training like triathlons during the winter months, I'd recommend going for something more durable that costs more.