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Different tyre heights front to rear


3Katz

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  • Member For: 6y 1m 23d

Does anyone know what percentage variance in tyre height from front to rear we can get away with? I've read that anything over 5% difference will trigger an abs fault but it seems some have got away with more...

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  • ...JD TUNING ADELAIDE...
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  • Member For: 15y 9m 26d
  • Gender: Male
  • Location: Adelaide

All depends on the make and model and then the Strategy in the ECU, there is no hard fast rule as I’ve seen everything from 22* rims with 25 profile up front to 15’s and 35 profile rears without an issue

 

then seen 20* rims with 30-35 split front to rear and trigger 

 

What kind of craziness are you looking to go ?
 

Ive got 19* 30 front 35 rear without an issue

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  • Member For: 6y 1m 23d

It's a BA RTV with all terrain 215/65 16s on the front and 235/60 16s on the rear. The rears are no longer available in that size and it looks like I'll need to go a 245 or 255 in a 70 profile which is a difference of 9.3% and 11.3% respectively. So is my tuner able to make adjustments to the ecu to cater for a difference in tyre sizes Aaron? 

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  • ...JD TUNING ADELAIDE...
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  • Member For: 15y 9m 26d
  • Gender: Male
  • Location: Adelaide

That shouldn’t be a problem on a BA strategy but yes it’s modifiable in the Tune if it does log the discrepancy :) 

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