70/80-R18 tires are 1.26 inches (32 mm) smaller in diameter than 80/90-R18 tires and the speedometer difference is 5.3% Mar 23, 2015 · Avon has two models of adventure tires available: Distanzia (left) and Gripster (right). The Distanzia is the more streetable tire (80% on-road, 20% off-road) and is designed for heavier-weight adventure bikes, while the Gripster is the tire with more off-road intentions (60% on-road, 40% off-road) for mid-size dual-purpose motorcycles. 120/70-R19 tires are 0.31 inches (8 mm) smaller in diameter than 110/80-R19 tires and the speedometer difference is 1.2%. 110/80-R10 tires are 1.26 inches (32 mm) larger in diameter than 80/90-R10 tires and the speedometer difference is 7.5% 110/70-R17 tires are 0.39 inches (10 mm) larger in diameter than 90/80-R17 tires and the speedometer difference is 1.7% 140/80-R16 tires are 0.39 inches (10 mm) smaller in diameter than 130/90-R16 tires and the speedometer difference is 1.6%. EChVUc.

80 90 vs 90 80 tire