My passenger side rear tyre has around 3mm of tread left. The driver side rear has around 4.5mm left. It's a very noticable difference to the naked eye. Both are Dunlop SP9000s that came new with the car (Yaris). The car's done 48k miles, and is approaching 4 years old.
On both tyres, the wear is pretty even across the width, and around the circumference.
What could cause this uneven wear? I assume it can't be pressures or tracking, as those would result in uneven wear within the tyre, not between the two tyres, right?
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The nearside tyre lives in the gutter and suffers more abuse from potholes, kerbs, drain covers, etc than the offside tyre does.
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Having re-read the subject header, it is the opposite of your question.
Can you confirm whether the osr is wearing more than the nsr, or the other way around?
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Sorry the subject is wrong. It's the passenger side that is more worn, which fits with your explanation of gutter etc.
{Header corrected. DD}
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Do you have a lot of roundabouts in your area?
El Dingo.
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Do you have a lot of roundabouts in your area?
Yes, quite a few. I guess roundabouts cause weight to the thrown to the passenger side, but could this really explain 1.5mm difference? It would make sense if I drove aggressively, but I don't - I drive pretty conservatively compared to most.
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Besides having more load on it, the N/S wheel is going round more times than the O/S so it is travelling further when going round roundabouts.
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Besides having more load on it, the N/S wheel is going round more times than the O/S so it is travelling further when going round roundabouts.
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I'm not sure that is true. If on average you go straight on at roundabouts (ie same number of left as right turns) then won't the extra revolutions on the roundabout be evened out by the two opposite turns as you enter and leave?
It sounds like a pretty convincing argument for swapping over wheels periodically.
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Two wrongs don't make a right, but three lefts do.
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