What size tires can be fitted on 8.5j rims?
3 Answers
8.5j rims can accommodate tires with widths of 235, 245, and 255. Below is a detailed introduction to car tire specifications: 1. Specification model representation: Tires are important components of a car, and there are many specification models for tires, with different specifications suitable for different types of vehicles. The specification model identification is usually on the sidewall of the tire, represented by a series of alphanumeric characters, corresponding to the tire's tread width, aspect ratio, type, rim size, load index, and speed rating. 2. Speed rating: Based on the maximum speed they can withstand, tires can be divided into different speed ratings from A to Z, with the A rating further subdivided into eight different levels from A1 to A8. The further back the letter representing the tire's speed rating is in the alphabet, the better the tire's performance.
When I used to modify cars, I often encountered issues with wheel and tire selection. An 8.5j wheel width is approximately 216 millimeters, and the suitable tire width generally ranges from 230 to 255 millimeters, such as common sizes like 235/40R18 or 245/45R19. Choosing tires depends on the wheel flange type and overall compatibility. If the tire is too narrow, the sidewall may bulge outward, leading to uneven wear, while tires that are too wide might rub against the fenders and affect steering. Last time, I installed 255-width tires, which provided excellent stability and grip, but required adjusting the car's height to avoid damaging the suspension. Additionally, maintaining an aspect ratio between 40 and 55 is ideal—too high, and the tires feel soft with excessive body roll in corners; too low, and the ride becomes harsh over bumps. Before changing tires, it's best to check the vehicle manual or measure the wheel parameters at a shop to avoid costly mistakes. Regular tire pressure checks are also essential for longevity and safety. In short, choosing the right size ensures a smoother driving experience and avoids unnecessary issues.
8.5j wheel width is measured in inches, and after conversion, a tire width around 230mm is generally suitable. From my observation, the standard range is best matched with tires between 235mm to 255mm in width. During installation, ensure the wheel flange properly fits the tire bead; otherwise, the tire may wobble at high speeds. Tire sizes like 235/50 or 245/45 are acceptable, but avoid too low an aspect ratio to prevent damage to the chassis. Over years of using this configuration, I've found that better matching leads to slightly better fuel efficiency, while mismatches can cause premature tire wear. It's advisable to consider wheel diameter simultaneously—pairing 17 to 19-inch wheels with corresponding tire sizes is straightforward. During routine maintenance, always check the tread wear for safety. If you're into modifications, you might try 255mm width for a sportier feel, but ensure vehicle compatibility to avoid accidents from improper setups.
