Tire dimensions question
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Tire dimensions question
Hello all,
I recently acquired 18" f-sport wheels for my 2011 is250 AWD. These are the wheels that match the AWD systems. My question is does lexus reprogram the car computer to recognize 18" wheels when customers upgrade to f-sports?
Stock tire- 225/45/17
Fsport tire - 225/35/18
Online calculators tell me I'll be going "3%" faster because of the shorter tire. What tire sizes have you all gone with?
-Chris
I recently acquired 18" f-sport wheels for my 2011 is250 AWD. These are the wheels that match the AWD systems. My question is does lexus reprogram the car computer to recognize 18" wheels when customers upgrade to f-sports?
Stock tire- 225/45/17
Fsport tire - 225/35/18
Online calculators tell me I'll be going "3%" faster because of the shorter tire. What tire sizes have you all gone with?
-Chris
#2
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hey chris, the recommended tire size for 18x8 wheels is 225/40/18. there's no reprogramming to speed sensors when you switch wheels. the only reprogramming you'll have to do is to your TPMS sensors. have you tried this website to calculate tire sizes?
http://www.rimsntires.com/specs.jsp
http://www.rimsntires.com/specs.jsp
#4
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The Lexus vehicle does not have the ability to to reprogram the speed sensors.
The engineers at Lexus at programmed it such that the spedometer will always report accurate speed or above but never below your actual speed, assuming the proper tires are used.
This is what it would be.
The engineers at Lexus at programmed it such that the spedometer will always report accurate speed or above but never below your actual speed, assuming the proper tires are used.
This is what it would be.
Originally Posted by Lexus
Standard indication (Actual speed) / Acceptable range
(speedometer display)
20 mph / 20.0 to 23.0 mph
40 mph / 40.0 to 43.5 mph
60 mph / 60.0 to 64.0 mph
80 mph / 80.0 to 84.5 mph
100 mph / 100.0 to 105.0 mph
120 mph / 120.0 to 125.5 mph
140 mph / 140.0 to 146.0 mph
160 mph / 160.0 to 166.5 mph
(speedometer display)
20 mph / 20.0 to 23.0 mph
40 mph / 40.0 to 43.5 mph
60 mph / 60.0 to 64.0 mph
80 mph / 80.0 to 84.5 mph
100 mph / 100.0 to 105.0 mph
120 mph / 120.0 to 125.5 mph
140 mph / 140.0 to 146.0 mph
160 mph / 160.0 to 166.5 mph
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Thanks for the responses guys. It would seem that even with a 3% too fast difference, the changes in MPH are still within the acceptable range.
20 mph / 20.0 to 23.0 mph (new value 20.6mph)
40 mph / 40.0 to 43.5 mph (new value 41.2mph)
60 mph / 60.0 to 64.0 mph (new value 61.8mph)
80 mph / 80.0 to 84.5 mph (new value 82.4mph)
100 mph / 100.0 to 105.0 mph (new value 103.0mph)
120 mph / 120.0 to 125.5 mph
140 mph / 140.0 to 146.0 mph
160 mph / 160.0 to 166.5 mph
20 mph / 20.0 to 23.0 mph (new value 20.6mph)
40 mph / 40.0 to 43.5 mph (new value 41.2mph)
60 mph / 60.0 to 64.0 mph (new value 61.8mph)
80 mph / 80.0 to 84.5 mph (new value 82.4mph)
100 mph / 100.0 to 105.0 mph (new value 103.0mph)
120 mph / 120.0 to 125.5 mph
140 mph / 140.0 to 146.0 mph
160 mph / 160.0 to 166.5 mph
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