Wheel size differences staggered setup affect on speedo?

[mpelon]

I’m thinking about going to a staggered set up for the warmer 5-6 months of the year and keeping my standard square 235/50r18’s for the winter, early spring, and late fall. I want to stay close to the same overall wheel height and circumference so I don’t have to bother adjusting the speedo. I know both 265/40r19’s and 295/35r19’s have very small differences from the stocks. But if I stagger those two sizes will that make any difference? The 265/40r19’s are -0.3% revolutions from stock and the 295/35r19’s are 0.4% revolutions from stock. One negative and one positive revolutions from stock. Will that make any noticeable difference? Or is that negligible?

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[MidwayJ]

I’m thinking about going to a staggered set up for the warmer 5-6 months of the year and keeping my standard square 235/50r18’s for the winter, early spring, and late fall. I want to stay close to the same overall wheel height and circumference so I don’t have to bother adjusting the speedo. I know both 265/40r19’s and 295/35r19’s have very small differences from the stocks. But if I stagger those two sizes will that make any difference? The 265/40r19’s are -0.3% revolutions from stock and the 295/35r19’s are 0.4% revolutions from stock. One negative and one positive revolutions from stock. Will that make any noticeable difference? Or is that negligible?

Whatever size you have on the rear is relevant to the speedometer. That difference looks negligible. I replaced my 235/50r18s with 275/40r19s and the speedo reads 2 mph slow at 70 mph.

 

[mpelon]

Whatever size you have on the rear is relevant to the speedometer. That difference looks negligible. I replaced my 235/50r18s with 275/40r19s and the speedo reads 2 mph slow at 70 mph.

Thanks! I figured that but was googling to make sure and nothing said that.

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