Tire-Wheel
Tire Speed Rating Explained: What Downgrading Costs
The speed rating certifies more than top speed. It is a proxy for construction and heat tolerance, which is why 'I drive slowly' is not the whole argument.
Tire-Wheel
Tire-Wheel
Load Range vs Load Index vs Ply Rating: Three Systems
One tire can carry an E, a 121 and a 10-ply marking. They are three systems from three eras, and you cannot convert between them by reasoning.
Tire-Wheel
Tire Load Index Explained: Why Lower Is Never Free
The load index is an index into a standard table, not a weight, and the scale is not linear. Here is what it rates and why going lower is never neutral.
Tire-Wheel
LT vs P Tires: What the Service Type Letter Changes
P, LT, ST and XL are not quality grades. They describe service type and rating conventions, and swapping between them changes how the tire is rated.
Tire-Wheel
Tire Size Numbers Meaning: P215/65R17 Explained
Three numbers in three different unit systems. Here is which is millimeters, which is a percentage, which is inches, and why that trips people up.
Tire-Wheel
How to Read a Tire Sidewall: Every Marking Decoded
A sidewall carries about six independent specifications plus manufacturing data. Here is what each marking governs, in the order you meet it.