What is the difference between 8j and 9j wheel rims?
1 Answers
9j wheel rims can accommodate tires with a maximum width of 265 mm and a minimum width of 245 mm, with the optimal tire width being 255 mm. 8j wheel rims are compatible with tires ranging from 225 mm to 245 mm in width, with 235 mm being the optimal width. The 'j' in 8j wheel rims stands for inches, so the difference between 8j and 9j is one inch, approximately 0.25 cm. Below is an introduction to wheel rims: 1. Bigger wheel rims are not always better: Firstly, larger wheel rims have flatter edges and reduced overall elasticity, which weakens their shock absorption capability on uneven roads, increasing the likelihood of tire bulging and blowouts. Secondly, the suspension system becomes less responsive to road conditions, rotational inertia increases, rolling resistance rises, and fuel consumption increases accordingly. Therefore, bigger wheel rims are not necessarily better; it's important to choose rims that match the vehicle's overall performance. 2. Tips for selecting wheel rims: When choosing matching tires, it's best to select tires with the optimal width for the rim, such as 275 mm for 9.5j rims. Although tires with the maximum width offer better grip and lateral force, the increased contact area leads to higher friction coefficients, which can negatively impact the vehicle's fuel economy.
