Does Size Matter?

[NSF]

Just curious, when y'all be puttin' bigger tires on your 1991-1993 NSXs (or 18-inchers on any NSX) don't the speedometer and odometer readings go all out of whack? Or does "tire size pessimism" make up for the built-in speedometer optimism and make everything hunky-dory?

Bonus question: do the 1991-1993s have smaller wheel wells, or is the 1/2" increase in tire radius not enough to matter?

My apologies for not misspelling "lose" anywhere in this post...

 

[ChopsJazz]

I have no idea about that, but I am rolling with laughter! I guess I loose.

 

[Edo]

The speedo won't be off unless you get tires that have a larger overall diameter than stock. You can get bigger wheels and tires that are the same overall diameter. Just lower tire profile and larger rims.

 

[nsxheat]

I have a 94 NSX with 265/35/18s on the rear. I too had the same question about speedometer error so when riding beside a friend at 70mph in my car, he was reading 75mph in his car. I haven't clocked it officially but from this approximation I'm assuming the speedometer is reading about 5mph slower at highway speeds.

 

[Jimbo]

No...No...

Just drive 5 miles an hour faster at all speeds and all is fine.

-Jim

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1992 NSX Red/Blk 5 spd #0330
1991 NSX Blk/Blk Auto #3070 (Sold)
1974 Vette 454 4 spd Wht/Blk
Looking for 76-79 Honda Accords

 

[DDozier]

How do you know your friends spedo is correct, you should check you spedo with a handheld GPS after any tire size change. Best of Luck.