* Uneven tire wear: This is the most likely culprit. The inside of the tire wearing more than the outside indicates something is misaligned or causing the tire to scrub against the road surface at an incorrect angle.
* Alignment issues: A misaligned rear axle (toe, camber, or caster) is a common cause. Negative camber (the top of the tire leaning inward) is particularly likely to cause uneven wear on the inside. Toe-in or toe-out (the angle of the wheels pointing towards or away from each other) will also cause uneven wear.
* Suspension problems: Worn or damaged suspension components (shocks, struts, control arms, bushings) can affect the tire's contact patch with the road, leading to uneven wear. A failing shock or strut could allow the tire to bounce excessively, exacerbating the issue.
* Brakes: A dragging or sticking brake caliper on the left rear wheel could cause increased friction and uneven wear on the inside of the tire.
* Bent rim: While less likely to cause *only* inside wear, a bent rim could contribute to uneven tire contact and a choppy feel.
What to do:
1. Visual inspection: Carefully examine the left rear tire and wheel for any obvious damage, bulges, or unusual wear patterns. Look at the suspension components for any signs of damage or looseness.
2. Check tire pressure: Ensure the tire pressure is correct according to the manufacturer's recommendations (found in your owner's manual or on a sticker inside the driver's side doorjamb).
3. Professional inspection: Take your vehicle to a qualified mechanic or tire shop for a thorough inspection. They can perform a wheel alignment check, inspect the suspension, and check the brakes. This is the best way to accurately diagnose the problem.
Ignoring the problem could lead to further tire damage, premature tire wear, reduced fuel efficiency, and potentially unsafe driving conditions. Get it checked out as soon as possible.
