Performance Difference in Wheel Diameter Z51 to Base
Thread Starter
Instructor
Joined: Oct 2022
Posts: 213
Likes: 58
Performance Difference in Wheel Diameter Z51 to Base
- Front: 18-inch x 8.5-inch (Stingray) - Rear: 19-inch x 10-inch (Stingray)
- Front: 19-inch x 8.5-inch (with Z51) - Rear: 20-inch x 10-inch (with Z51)
I have Z51 and I'm wondering why I'd want to keep the standard 19x20 sizing.
Drifting
Joined: Dec 2019
Posts: 1,811
Likes: 615
From: Blacksburg Va
The OD of the tires is very similar 18/19 vs 19/20. So there isn't any perceptible change in gear ratio. My 19 base car came w/ the 19/20 sizes and I have swapped to 18/19. There is definitely a better ride w/ the smaller wheels since the tire section is taller. IMHO all this huge wheels, thin tires has a basis in race cars because, for a given tire OD, you can fit larger rotors/brakes. For a street car I think it is stupid.
Burning Brakes
Joined: Jun 2023
Posts: 952
Likes: 440
From: FL
19's came stock with 19/20. I would have preferred 20's or 19's all around actually. Z51 has 1" bigger front rotors which may have been a reason why they went to 19". And since GM wanted to keep the staggered, they moved 20's to the rear.
Pro
Joined: Feb 2023
Posts: 576
Likes: 164
bigger rotors in the rear too.
