Hey all
Picking up new rims soon in 16". Looking for some assistance regarding tyre size. Went to tyre power and was quoted for some 205/50 tyres.
Tyre guy said this would be the closest fitting tyre to the rolling diameter.
was using this calculator:
(http://www.miata.net/garage/tirecalc.html)
and tried the stock size of 185/65/R14 to
205/50R16. Sizes look about the same, but speed is calculated at 0.26% to slow and when speedo says 100kmh i am going to go 102.6kmh. When trying 205/45/R16 the speeds go negative such as 0.9% too fast and when speedo says 100kmh id be travelling at 99.1kmh..
Getting confused at size now. Also looking at lowering the car, does this come in as a contributing factor?
need help!!
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