"dont get bigger tires... it will throw off your speedo", i beg to differ Options

[lagos]

so, for years ive always had people say to stay with low profile tires, because anything bigger will throw off your speedo. im sure we've all seen the online calculators and countless threads. ive even had tirerack call me back and try to convince me to change my order from 225-45-17s to 205-40-17s because of this..lol ...

well anyway, i just wanted to say that all that, is mostly a myth. i recently got a gps for my car. my speedo is dead on with the mph reported by the gps. i was a bit shocked because i expected it to be off by at least 1-3mph. so go ahead, get bigger tires and enjoy the ride quality..your speedo will be just fine

This post has been edited by lagos: May 24, 2007 - 9:25 PM

[lagos]

With my 215/45/17s on my Celica (AT200 tranny), my speed is off by approximately eight percent. And this is according to a police radar.

I don't see why your speedometer isn't off. Are you using the factory S54 tranny?

yeah factory s54.

you cant really go by the radar gun, cause its hard to remember the exact mph you were at, at the exact second he shot you with the gun. you could have slowed down or sped up for a second and not realized it.