Today on our 2002 GMC Envoy we're going to be test fitting the Saris Thelma 3 bike platform rack, part number SA4239B. We already have a bike rack installed. How it holds on to the rack . there's actually no contact made with your bike frame. You have the two straps here for the wheels and that's what holds it in place. Let's go ahead and take those off. Start with the back one.… see more >