What is ramp travel index?

Ramp travel index (RTI) is a measurement used to evaluate the off-road capability of a vehicle. It represents the maximum angle at which a vehicle’s wheels can travel up a ramp before one or more wheels lose contact with the ramp. The RTI is expressed as a percentage, with higher percentages indicating greater off-road capability.

To measure RTI, a vehicle is driven up a series of inclined ramps with increasing angles until one wheel lifts off the surface. The maximum ramp angle at which all four wheels remain in contact with the ramp determines the vehicle's RTI.

RTI is used as a guide for determining a vehicle's ability to traverse steep and uneven terrain, such as rocks, logs, or other obstacles. A higher RTI score means that the vehicle has better articulation and wheel travel, thus making it easier to navigate challenging terrain. Off-road enthusiasts often use RTI scores to compare the capabilities of different vehicles and make modifications to improve their off-road performance.