Rep Power: 383

I used the tire calculator and it said this size was only .96 off my orignial, i have a 2002 civic ex coupe and I wanted to get some 18s but i am worried about the speedomter reading and I dont know much about tires, so I was asking before I can in so I know what I want. Also why do people say if your more into performacne then you should only go with 16s or 17s at the biggest? Thanks

 
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The 225 width may be too wide and rub, I have 215/35 and its pretty close. I think someone here is using 225/35's though. The reason people say to go with 16's or 17's is because those generally weigh less than an 18" wheel or a 19". The less weight you have for wheels is the less unsprung weight the engine has to turn to get the car moving. Meaning it will accelerate quicker.

 
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even 215 is pretty thick