When it comes to motorcycle performance and safety, your tires play a massive role. But have you ever looked at the numbers and letters on your tire and wondered what they actually mean? Understanding motorcycle tire codes helps you pick the perfect tire for your riding style and ensures your bike performs at its best.
Understanding Motorcycle Tire Size and Type
Each motorcycle tire has a unique code printed on its sidewall — something like 120/70ZR17 (58W). This isn’t just random data. The first number (120) indicates the tire’s width in millimeters. The second number (70) is the aspect ratio, which tells you how tall the tire’s sidewall is compared to its width.
The letter Z represents the speed rating, and R17 means the tire fits a 17-inch rim. Knowing these details ensures your tire fits perfectly with your motorcycle’s specifications.
How to Read the Motorcycle Tire Code (With Example)
Let’s break it down:
120 → Tire width (in mm)
70 → Aspect ratio
ZR → Construction type & speed rating
17 → Rim diameter
(58W) → Load and speed index
For example, if you’re a sport bike rider, you’ll often use a 120/70ZR17 front tire. Touring bikes might have different ratios to offer better comfort and stability. Always refer to your motorcycle manual before purchasing.
Choosing the Right Tire for Your Riding Style
Different riders need different tires.
Sport riders should go for high-grip tires for better cornering.
Touring riders need tires with long-lasting tread.
Off-road riders prefer knobby tires for extra traction.
At Nagoya Motor International, we offer a wide range of genuine motorcycle tires and accessories suitable for any riding style — ensuring performance, safety, and comfort on every ride.
