Bar Fly Mount, Waterproof/Rugged Optrix Case Look at the front of any pro field and your will see BAR FLY mounts. Pros know that mounting your information in front where you can see it and out of the wind is critical. CycleX was developed to bring that innovative mounting technique to the iPhone. Offering both landscape and portrait views to accommodate your favorite apps while being versatile and lightweight. Your iPhone just became the second most powerful thing on your bike. Weight 135g (55g just mount). Includes iPhone 5/5S sled, waterproof case and BarFly handlebar mount. Fits all standard 31.8mm bars. If your bars are 26.0mm or 25.4mm this product will not fit.