Looking for some friendly tire advice...

[StevieRaySTL]

-- Got a set of M45 18x8s that are going on my 90 Q and I'm currently tire shopping. Would I be better suited with a 245/45 or 255/45? Just looking for some thoughts & opinions, especially from someone running this type of setup. Thx in advance, Nico is Nice.

[qship96]

I thought the M wheels were the wrong offset for the Q??????

[Q451990]

45mm on the 90-96 OEM wheel vs. 47mm on the 18x8 M45 wheel. The earlier 18x7.5 M45 wheels had a 35mm offset, so that's probably what qship is thinking of.

Heath

[szh]

-- Got a set of M45 18x8s that are going on my 90 Q and I'm currently tire shopping. Would I be better suited with a 245/45 or 255/45? Just looking for some thoughts & opinions, especially from someone running this type of setup. Thx in advance, Nico is Nice.

Based on what the rolling diameter would end up, I'd say that 245/45-18 will be a better fit for the first gen Q.

Lots more tire options in that size too.

Regardless, since it is a first-gen Q, I'd still be concerned about fitment using the current-gen M wheels. The original OEM wheels were a lot narrower, etc.

I think that the 47mm offset of the wider 2006+ M wheels will contact the suspension components - the first-gen M with 35mm offset would be a far better fit.

But, the best idea is to try a fit at a friendly tire place - just wheels first and then with tires.

Z

[elwesso]

245-45-18 is the ideal tire size on the Q.

[DoinkMobb]

Stock tire size: 215/65/15 = 26.0" diameter245/45/18 = 26.7" - your speedo will read 2.6% high

I would go with:255/40/18 = 26.0" matches stock diameter-OR-245/40/18 = 25.7" - your speed will read 1.1% low

I have G35 coupe rims 18x8 on my '94 and I went with 245/40/18 because the tires I wanted were a LOT cheaper in that size and the speedo is only off by a tiny bit.

However, the G35 coupe rims have a 30mm offset, so I would double check that the 47mm offset isn't too high.

[maxnix]

There was a great tire sticky in Infiniti General.

Maybe Z can locate it for us.

Also a comprehensive wheel post in this forum that was effed up by careless VIP type posters.

[StevieRaySTL]

Thanks for the advice guys! Ill post a pic up in a while when I get them on. The injectors & chain guides should be done in a week or so. Thx again.

[StevieRaySTL]

They fit great, thanks guys. Sorry about the poor cell phone pics, my camera is out of commision. Nico is Nice.

[BadQ45t]

Very nice. Those must be 03' M45 Rims as the 06' versions need spacers on 1st or 2nd Gen.

Good score, great update on the car.

[StevieRaySTL]

-- Thanks! I believe they are off a 2006 M35x, got em on here from a guy in KC.

[maxnix]

I thought the M wheels were the wrong offset for the Q??????

The Y34 will fit, the Y50 will not wihout the additional dead weight of spacers.

[paranoidjack]

Those look nice and meaty.

[StevieRaySTL]

-- Thanx

[qship96]

The wheels almost look too big for the car?

[maxnix]

They look bigger than 18" for sure. More like 20"'