ARKON GPS032 Waterproof Protective Case with Motorbike / Bicycle Handlebar Mount.
Fits: the Garmin Nuvi 255

Now you can use your regular 'CAR' TomTom GPS system out on two wheels without worrying about the elements.
A must have accessory for Motorcycles & Bicycles.
The Case: The transparent touch through lens allows you to view and control the touch screen of your GPS.
A water resistant zipper on the case is easy to use and keeps the water out.
A cut out on the bottom of the case provides access for charging cable.
Three pieces of foam included serve to fit the case with varying sizes of GPS brand or device size.
Case unclips easily for security & storage.
The Mount: Arkon handlebar mounting pedestal has ball joint adjustment & easy to use tightening ring for full adjustment.
Fits handlebars from approx 16mm up to 33mm diameter and is compatible with standard (25.4mm and 26mm) size handlebars.
Suitable for most straight, drop, trekking, and touring size handlebars.
Made from high grade plastic this handlebar mount is light-weight yet tough.
Uses: For use with bicycles, motorcycles, golf carts, ATVs, snowmobiles, hang gliders, or other apparatus having cylinder-shaped frames or posts.