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07-18-2009, 08:53 PM | #1 |
daily driver
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for those that came w/ 14's
for those of us who's yaris came w/ 14's from the factory w/ 175-65-14 tires....it would seem as though the speedo is calibrated for 185-60-15 sizing...
i say this as i was driving w/ friends w/ oem-sized wheels and gps, and since we had radio's, i could ask what speed they were going. it would seem that w/ 195-50-15 tires, my speedo was off by about 4km/h that would lead me to believe that despite the fact that my car came with 175-65-14 tires, my speedo is calibrated for 185-60-15 just food for thought next time you're buying tires for your yaris
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07-18-2009, 09:01 PM | #2 |
Start another Oil Thread!
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do you both have ABS? or neither? or one and not the other?
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07-18-2009, 09:35 PM | #3 |
╚══════════RN
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Hmph. Is there a way to see what is actually programmed in the ECU (or wherever this info is stored)? This would be really annoying to have to fix in my fuel economy spreadsheet lol.
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07-19-2009, 08:24 AM | #4 |
daily driver
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i dont have abs
friends w/ matrix's both have abs....one is an xr and the other an xrs. both said they were doing 113-114kph when i was doing 117-118
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07-19-2009, 09:30 AM | #5 |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
Location: toronto, canada
Posts: 3,637
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try using gps..i find them more accurate on reading on ur actual speed..
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07-19-2009, 11:58 AM | #6 |
daily driver
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both guys were using gps that agreed with THEIR speedos, not mine
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07-24-2009, 11:15 PM | #7 |
Drives: 09 Yaris 3 Dr White LB Join Date: Mar 2009
Location: PA
Posts: 432
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This is interesting info, I try to keep the diameter as close to stock as possible, otherwise your data is off and it can affect your gas milage as well.
I wonder if they ran the EPA MPG test on 14"s or 15's ? |
07-24-2009, 11:34 PM | #8 |
daily driver
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i honestly have no idea...its a clusterfuck
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07-25-2009, 05:48 AM | #9 |
JDM yO!
Drives: '09 3dr. 5-spd Join Date: Oct 2008
Location: Sydney, Australia
Posts: 331
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That's odd.. my Yaris comes with 185/60R15, but when my speedo reads 60km/h, the GPS reads ~57-58km/h.. Maybe my speedo is off, either that or my GPS is not accurate.
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