If your Dyno is a Deluxe Glide or A Ultra Glide, the width at the front of the chain stay is 2.75. The Moto Glide is 3.25, a 50mm Wheel will fit a Moto Glide. At the hub mount the Deluxe Glide & the Ultra Glide are 4.25. The Moto Glide is 5", Hopefully that helps.