Will changing tires from 65 to 70 make them more stable?

[OGabriella]

Tires changing from 65 to 70 will not be more stable. Reasons for instability: The aspect ratios are different, one being 65 and the other 70. The aspect ratio is related to the section height and section width. If the section width is the same, then the section height will also differ. Effects after changing tires: It will affect the performance of the tires, driving feel, and fuel consumption. Automobile tires: They are one of the important components of a car, directly in contact with the road surface. Together with the car suspension, they mitigate the impact during driving, ensuring good ride comfort and smoothness; ensuring good adhesion between the wheels and the road surface; improving the car's traction, braking, and off-road capability; and bearing the weight of the car.

[OJuliet]

I've changed tire sizes several times, including switching from 65 to 70 series. The numbers in tire sizes represent the percentage of sidewall height to tire width. Changing from 65 to 70 means thicker and softer sidewalls. This makes your ride more comfortable on bumpy roads with reduced vibrations, but handling worsens. During turns, the increased sidewall deformation causes noticeable body sway, making the car feel less stable. I recommend this change only if you frequently drive on rough roads or prioritize comfort. For daily highway driving, sticking with the factory 65 series is more ideal. Also note that changing tire size may affect your speedometer readings and fuel consumption, so check wheel rim compatibility. Overall, if stability is your priority, avoid 70 series tires—they're better for improving comfort rather than stability.

[VanKendra]

I heard from others' experience that after switching from 65 to 70 tires, the ride feels like wearing a pair of soft shoes—less bouncing over bumps and improved comfort. However, at high speeds or during sharp turns, the car sways more, handling becomes sluggish, and it feels less stable. Especially on slippery roads during rain or snow, it's more prone to skidding and losing control. I suggest you can try it if you prioritize daily comfort, but avoid aggressive driving. Before changing tires, measure the overall diameter, as the thicker sidewall of 70 series may increase tire height, affecting ground clearance and safety. The original 65 series offers better-balanced handling, and safety should always come first.

[AdrianaMarie]

As an experienced driver with years of driving, I noticed a significant softening in handling after switching from 65 to 70 tires, making cornering unstable. The thicker tire sidewalls absorb vibrations but lack sufficient support during turns, creating a floating sensation. I advise against blind upgrades—the original factory design is the safest option. Larger tires may also cause speedometer inaccuracies, increased braking distances, and higher risks. Safe driving should always come first.