One of the most popular cycling computers on the market, theCateye Velo 9 VL820 Cycling Computer represents great value and a top qualitycomputer for the price. Whilst it is a wired setup it can still be installed on your mountain bike in a way that it has less chance of being ripped out by a branch. If you neatly wrap the cable around your front brake cable you can then run it down the fork leg to have a clean install. Out of the box, it comes with a single handlebar mount. It is compatible with 29″ wheels too.
Functions:

• Current speed
• Maximum speed
• Average speed
• Trip distance
• Total distance
• Elapsed time
• Calorie consumption
• Carbon offset
• Clock

Features:

• Auto start / stop
• Pace arrow
• Simple tire size
• Programmable odometer
• Zip tie mount compatible with FlexTight universal bracket

Specs:

• Current speed0.0 (4.0) 199.9 km/h [0.0 (3.0) 124.9 mph]
• Elapsed time0:00’00″9:59’59”
• Trip distance0.00999.99km [mile]
• Average speed0.0199.9km/h [0.0 124.9 mph]
• Maximum speed0.0199.9km/h [0.0 124.9 mph]
• Calorie consumption0 99999 kcal
• Carbon offset0.00 999.99 kg
• Total distance (Odometer)099999km [mile]
• Clock0:00’23:59′ [1:00’12:59′]
• Pace arrowYes
• Auto power savingYes
• Auto start/stopYes
• Odometer manual setYes (only the current version produced since 2015)
• Tire size16″/ 18″/ 20″/ 22″/ 24″/ 26″/ 700C or 100cm299cm (default26″)
• BatteryLithium battery CR2032X1
• Battery lifeapprox 3 years (1hr use per day, may vary depending on environment.
• Dimension55.537.518.5mm
• Weight28 grams