# Mileage problems

**URL:** <https://forums.speedlife.net/t/mileage-problems/124138>\
**Category:** SON240sx Automotive\
**Created:** [May 3, 2009, 8:44pm UTC](https://forums.speedlife.net/t/mileage-problems/124138 "2009-05-03T20:44:06Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\
**Post date:** [May 6, 2009, 1:14pm UTC](https://forums.speedlife.net/t/mileage-problems/124138/18 "2009-05-06T13:14:25Z")

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> [@which wine to get?](https://forums.speedlife.net/t/which-wine-to-get/21822/49):
>
> no one ever seems to think about your tire sizes and gear ratio’s
> 
> gawd!

Well considering all USDM 240’s from 89-98 all have the same tranny/diff gearing and all SR20 equipped JDM/EUR also have the same gearing. The only way it would change is with a CA18 Tranny, Diff etc… I’m 90% sure even the RB20 has the same gearing “tranny wise” not sure about the diff"

Tire size… sure.

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