Vetta RT255 Heavy Duty Cycling Computer It includes all the functions of the RT233 and adds readings on Maximum and Average Speed plus a Speed Comparator function. A Ride Timer in enables riders to compare ride times and measure performance improvement over the same route. The Heavy Duty Metal Braided Cable, with advanced abrasion-resistant, can decrease damages... 

Vetta RT55HD Heavy Duty 10 Function Cycling Computer Heavy-duty, metal braided transmission cable is designed to take a beating. Exclusive programmable service timer reminds you when its time to service your bike or suspension. Dual display keeps all your information within easy viewing. Ride timer compares your ride times, so you can measure your performance...