- Speed Rating: ZR tires are designed for higher speeds (over 186 mph), while your current H-rated tires are suitable up to 130 mph. Unless you frequently drive at very high speeds (like on the Autobahn), H-rated tires should suffice for everyday use.
- Seasonal Use: ZR tires are often geared towards summer or three-season use. If you live in an area with harsh winters, these tires might not be suitable year-round. Check if you need a separate set of winter tires.
- Performance on Road: ZR tires may offer better grip due to a softer compound, but this can lead to faster wear. They might be "stickier" on the road, which can be an advantage for handling but might slightly reduce fuel efficiency.
- Durability: ZR tires generally have a shorter mileage warranty compared to R tires. This means they might need replacing sooner, which could increase long-term costs.
- Noise, Vibration, Harshness (NVH): Higher performance tires like ZR might introduce slightly more noise and harshness, but this varies between tire brands and models. It's not a guaranteed downside but something to consider.
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