Classic Style Bike Speedometer - chrome bezel old school style retro bicycle speedometer with crystal acrylic, looks great on your bike. big in size, easy to read.<br> Easy to Install - simple installation only takes a few minutes. mount the reader on the handlebar, attach the gear to the axle of the front wheel, link them by the cable. no need for batteries and adjustment setting.<br> Auto-reset - there's no reset button. as a mechanical speedo, the odometer will turn to 0 when the mileage reaches 9999.9 to start over.<br> Applicable - perfect for 26/28/29/27.5" road bike, mountain bike, folding bike, and old style exercise bicycles. this speedometer may not be compatible with some electric-assist bicycles. it is not for the quick release wheels that go above 38 mph.<br> Metric Measurement - the speedometer is in kph which is the most widely used measurement, not in mph. a kilometer is 0.62 mile. when the speedometer needle indicates 30kph, the speed is approximately 18.6 miles per hour.<br> Specification:<br> Size: 8x8.5x2cm / 3.14x3.34x0.78inch<br> Material: Plastic<br> Package Includes:<br> 1 Piece Bicycle Speedometer<br> Note:<br> Please allow 1-3mm measuring deviation due to manual measurement.<br> Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store