What does st mean on a trailer tire?
Special Trailer (ST) Trailer tires are developed specifically for use on travel trailers, pop-up campers, boat trailers and fifth wheel trailers. Designed to deliver on-highway service for towed trailers, ST-sized tires are not intended to be used on cars or light trucks. Because trailers are designed to carry cargo and that cargo is often heavy, ST tires have even more load capacity than a similar sized LT tire. Comfort is not really a concern because trailers are not intended to have people as cargo.Tires beginning with a ST (for example ST175/80R13) indicate a Special Trailer tire and should only be used on car, boat or utility trailers.Tire Size Compatibility: Designed specifically for ST175/80D13 , Max Load: 1360 LBS, Aspect Ratio: 80 mm ; Rim Dameter: 13“ , Tread Depth: 6.The difference between the letter D in your ST175/80D13 and the R in the tire size of the Wheel and Tire ST175/80R13 part # AM31985 that you referenced is the tire construction. D stands for bias-ply which is a less preferred tire construction, whereas R stands for radial.The D on trailer tires refers to the tire’s load range or its ability to carry a specified amount of load at a certain pressure. The letter D indicates a load range of 8-ply, meaning it has the strength of an 8-ply tire but isn’t necessarily constructed from 8 physical plies of material.
Is a taller or wider tire better?
Wider tires perform better on dry surfaces. Dry grip and performance are generated with the footprint’s road surface contact. Since wide tires provide a larger road contact area, they are able to significantly improve its handling and maneuvering, even during their high speed applications. Wider tyres are heavier to move and will have a bigger contact patch with the road surface, resulting in more friction and energy expenditure. On the other hand, thinner tyres are lighter and have smaller contact patches, resulting in less friction and energy loss.Research shows that 28-mm or even 30-mm tires can be faster. That’s not just due to the width of the tires, though. Wider tires are only faster on wider rims.
Which is a taller tire, 70 or 75?
Your proposed replacement with 225/75/16 tires would have a SIDEWALL HEIGHT of (225 x . Thus, the SIDEWALL HEIGHT with the 225/75 tire will be 4. TALLER (about 1/6 of an inch). A tire with a size of 70/80 has an aspect ratio of 80%, while a motorcycle tire with a size of 80/80 has an aspect ratio of 100%. This means that the height of the 70/80 tire is 80% of its width, or 56 millimeters if the tire width is 70 millimeters.Your proposed replacement with 225/75/16 tires would have a SIDEWALL HEIGHT of (225 x . Thus, the SIDEWALL HEIGHT with the 225/75 tire will be 4. TALLER (about 1/6 of an inch).
What is the 3% rule for tires?
The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy. Simply put, plus sizing is when the size of the tires and/or wheels from the original size (Original Equipment, or OE) is increased. The idea is to maintain the same diameter and circumference as the OE setup to minimize changes in speedometer accuracy, traction, and power. This is also referred to as the 3% rule.The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy.The 105% rule says that the external rim width of your wheel should be at least 105% of your tire’s actual measured width. This ratio allows the airflow to remain attached as it moves from the tire onto the rim, reducing drag and making your bike more aerodynamic.The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy.