Re: 27" to 28" front tire swap
You really need to know what the tire actually measures before you can make an apples to apples comparison. The advertised sidewall diameter isn't what the tire measures.
So, you may go from a 27" tire from one manufacturer to a 28" tire from another manufacturer, but see no noticeable change of ET because the tires may be very close in diameter.
If you are wanting a tire to improve ET, make sure you buy the tire with the largest diameter. You will also have to run more air pressure that the manufacturer suggests to get the most effect from this change unless you have a very light car. And remember to stage as "shallow" as possible and be consistent with your staging.
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Chris Bowman
The Mountain State Mustang
1984 Mustang GT350
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