Upgraded Adjustment Knob: motorcycle cup holder use adjustment knob instead of rubber teeth to tighten. The upgraded design makes the cup holder fit various sized containers and hold cup more sturdily from spilling or falling while riding. Meanwhile you can take your cup out more easily without scratching mugs. Fit 0.87"-1.25" Pole: Comes with two different pair of spacers, the cup holder for motorcycle fits 7/8"-1 1/4" diameter handlebars/poles. Compatible with most Harley Davidson motorcycle, Can-Am, Kayak, ATV/UTV, stroller, scooter, Yacht, bicycle, bike, boat, cruiser, canoe, golf cart, wheelchair etc.Load Capacity up to 32oz: Adjustable Top Diameter: 2.36"-3.15", Deep Height: 4.92". Work great for different size cups, cans and bottles, the ATV cup holder maximum capacity up to 32oz. Please note the top diameter, your mug within the range will hold. Easy Assembly & Solid Attachment: Install within 5 minutes, all installation tools included. Featuring non slip clamp, the haley davidson cup holder will grip your large-capacity bottles securely on the road. No swivel around and get loose. It will be the best gift for motorcycle riders. High Quality Material: Chrome mounting piece will blend in with your motorcycle bike and etc. Compared with the plastic holder on the market, the C4 motorcycle accessory is more durable for use. Soft basket is waterproof neoprene material, which can cradle your cup properly, and easy to dry after rain.