ICO (Rally Trip Meter)

ICO is the name rally riders commonly use for the trip meter, after the ICO Rally brand. Mounted next to the roadbook, it shows total distance, a resettable partial distance and often the current compass heading (CAP), so the rider can match each roadbook box to the ground.

No trip meter is perfectly accurate: tyre wear, wheel spin and different lines all cause small errors that build up. ICO correction means adjusting the total distance up or down at a clearly identifiable landmark so that it matches the roadbook again.

Calibrate the meter on a known distance before the event, and correct it at junctions, bridges or other distinct points rather than guessing in open terrain. Most units are adjusted with a handlebar remote.