spedomiter question.
so my friend is lookin into buyin a chevy 1500, it has a 7 inch fabtech kit on sum 35" km2s. the spedo is off 20 mph and has stock gearing...normal?
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anytime you change tire size or gears, it will throw off the speedometer.
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Originally Posted by drppdyllwrngr
(Post 1731578)
anytime you change tire size or gears, it will throw off the speedometer.
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Friends don't let friends buy Chevys!
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Originally Posted by dabumblebee
(Post 1731977)
Ya I kno but that much?
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it wouldn't be off by a set MPH
it would be off by a percentage..... i switched from 225/75/R14 to a 245/75/R16 its about an 10.5% difference so i just do the math when driving down the road.... 60 mph X 1.10 = 66mph so if my speedo says i'm doing 60 i'm actually doing 67 if it says i'm doing 65, i'm actually doing about 73 use a tire calculator online to figure out what percentage its off by, then just do the math on the fly |
Originally Posted by TheStig88
(Post 1731987)
it wouldn't be off by a set MPH
it would be off by a percentage..... i switched from 225/75/R14 to a 245/75/R16 its about an 10.5% difference so i just do the math when driving down the road.... 60 mph X 1.10 = 66mph so if my speedo says i'm doing 60 i'm actually doing 67 if it says i'm doing 65, i'm actually doing about 73 use a tire calculator online to figure out what percentage its off by, then just do the math on the fly |
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