What does 41P mean on a motorcycle tire?
3 Answers
In motorcycle tires, 41P refers to the load index where 41 indicates the load capacity, and P represents the speed rating. Tire designation methods: There are various ways to denote tire specifications, with four common types in the market: British, German, metric, and American systems. Here's a brief explanation: The British system, used by former British colonies, employs inches as units. For example, 4.00H184PR means a width of 4 inches, suitable for speeds below 210 km/h, with an 18-inch wheel diameter and 4-ply rating. Metric tire designation: This provides a more comprehensive description of tire characteristics. Similar to the German system but replacing the "-" symbol for low-pressure tires with "R" to indicate radial construction. For instance, FZR400's rear tire is marked as 140/60R1864H, where R18's R signifies it's a radial tire.
The 41P marking on motorcycle tires took me over a decade of riding to fully understand. The number 41 is a load index, meaning each tire can bear a maximum of 145 kg - essentially its load capacity. The P stands for speed rating, indicating a top speed of 150 km/h. For us riders, these represent safety baselines. When choosing tires, consider your typical passenger/cargo weight and highway speeds. Overloading risks tire deformation/blowouts, while overspeeding accelerates wear or causes loss of control. Always check your vehicle manual to ensure matching OEM specifications. The tire sidewall also shows size/construction markings (like 120/70R17) - examine these together for complete information. Never install mismatched tires, and regularly check pressure/tread wear during maintenance to prevent roadside emergencies.
As a motorcycle mechanic who deals with tire installation and removal daily, I can instantly recognize the meaning of 41P. The number 41 is the load index, corresponding to a maximum load capacity of 145 kg, while P is the speed rating, limiting the tire to 150 km/h. These specifications are crucial when selecting new tires—insufficient load capacity or exceeding speed limits can lead to issues like blowouts or unstable handling. The tire marking 41P, combined with other data such as tire width and construction, ensures compatibility. I've seen too many people overlook this, only to end up with hefty repair bills. Make it a habit to check tire pressure weekly to extend tire life and ensure safe riding. Also, pay attention to motorcycle types: street bikes commonly use P-rated tires, while off-road bikes may have different markings. Safety should always come first—don't skimp on this small expense.
