Question About Rim Sizes...

[BLISTC]

lol my 295/30/19 cost $800 EACH

so thats all 4 of your tyres for 2 of mine............ and i am running them into the ground with -2.5 deg camber (*cries*)

[Pulp]

Question for rs73, did you lower your ride after putting the 19s on?

[rs73]

No I did not. I haven't touched any springs/shocks on my car since it arrived from Japan.

Aren't coupe always a little bit lower than sedans?

going from 245/45R18 to 275/35R19 does reduce the diameter by about 2.5mm which is not really much, and reduce the rolling diameter by about 8 mm only.

maybe the car had 350Z spring or a lowered spring, but the ride felt stock - no sign of aftermarket spring feel when it was on its OEM 18" a while ago. On 19" with lower profile it does introduce a bit more harshness because of the smaller sidewall...

It's also a very tidy auto so very unlikely the previous owner modified it in Japan with coilovers etc.

[Eldubb]

What is the correct size for rims + tyres for 19" on the Coupe?

[n15m0]

What is the correct size for rims + tyres for 19" on the Coupe?

Do a bit of research on g35driver.com plenty of info there.

Coupes can take a much wider wheel/tire combo front and back not to mention run really low offsets as well. You should take full advantage of this if you have a coupe. My advice:

1. find the wheel that you like

2. see if they are available in 9" front and 10" rear

3. choose an offset between +10 to +15

4. Then use the tire calculator to work out tyre profile and width

If you are looking locally at wheel shops etc, your choices will be significantly limited with regards to offset and width.

Try sourcing 2nd hand Jap wheels, there are quite a few around if you keep your eyes peeled.

[Eldubb]

Ok, been looking around.

If i decide to go from 225/40/18f to 245/35/19f, then i actually lower the ride height by about 40mm? Is that right?

Edited July 3, 2009 by Eldubb

[rs73]

Man, stop playing the guessing game and use this converter...

http://www.miata.net/garage/tirecalc.html

[n15m0]

Ok, been looking around.

If i decide to go from 225/40/18f to 245/35/19f, then i actually lower the ride height by about 40mm? Is that right?

They are both completely wrong profiles for a V35.

Use the calculator and stick in 245/45/18 as your tyre then compare it with profiles in 19 inch.

To give you an idea I'm running 245/40/19 and 275/35/19. Your overall diameter should be around 675mm on average +/1 15mm is ok

[rs73]

sorry n1sm0, 245/40/19 is the WRONG profile for V35 front.

the closest profile to stock 225/45/18 at the front is 245/35/19

the rear 275/35/19 you have IS the closest profile to stock 245/45/18

[rs73]

unless you have a sedan. but for a coupe it'll have to be 245/35/19 front and 275/35/19 rear because coupe is staggered tyre size with no way of doing 4 corner tyre rotation

[n15m0]

sorry n1sm0, 245/40/19 is the WRONG profile for V35 front.

the closest profile to stock 225/45/18 at the front is 245/35/19

the rear 275/35/19 you have IS the closest profile to stock 245/45/18

245/40/19 = 678mm

275/35/19 = 674mm

245/45/18 = 677mm

Don't argue with me I've done my homework, my tire guys agree with me and the guys in the US run this profile on their g35s

Our cars are rear wheel drive, best to compare it with the rears.

[Eldubb]

The guys on the G35 forums are saying the closest to stock is 245/35/19f and 275/35/19r but not on OEM 19" rims, only on rims that are at least 9"....

That's why i was wondering if i went from 225/40/18 (my current incorrect tyre) at the front, and wanted to get a 19" wheel+rim, then apparently the correct is 245/35/19f and 275/35/19r, and my question was - this actually lowers the ride height?

Edited July 3, 2009 by Eldubb

[n15m0]

The guys on the G35 forums are saying the closest to stock is 245/35/19f and 275/35/19r but not on OEM 19" rims, only on rims that are at least 9"....

That's why i was wondering if i went from 225/40/18 (my current incorrect tyre) at the front, and wanted to get a 19" wheel+rim, then apparently the correct is 245/35/19f and 275/35/19r, and my question was - this actually lowers the ride height?

it won't lower ur ride height, it will give u increased ground clearance.

Rianto - the 225/45/18 & 245/45/18 combo is a bit of an exception to the rule, difference in OD is quite a fair bit and the 350zs came with these from factory, so I understand where you are coming from. But remember, our cars (sedan) came out of the factory with all 4 same width wheels and tyre profiles, so it would make sense to keep the OD front and rear as close as possible.

There are guys in the US tht run 245/35/19 & 275/30/19..they are the ones who dump their cars and like running skinny tires which looks good.

[Eldubb]

Ah yes i see now, ride height goes up - i was calculating difference in sidewall height instead of diameter.

If i get 19 x 9"-10" rims, i'll definately be getting 245/35/19 and 275/35/19 tyres if i can.

[rs73]

it won't lower ur ride height, it will give u increased ground clearance.

Rianto - the 225/45/18 & 245/45/18 combo is a bit of an exception to the rule, difference in OD is quite a fair bit and the 350zs came with these from factory, so I understand where you are coming from. But remember, our cars (sedan) came out of the factory with all 4 same width wheels and tyre profiles, so it would make sense to keep the OD front and rear as close as possible.

There are guys in the US tht run 245/35/19 & 275/30/19..they are the ones who dump their cars and like running skinny tires which looks good.

yep, but that's because the guy who's asking this question wants a 19" for his coupe, that's why I was referring to the staggered coupe sizes...

and very unlikely he's going for a standard OEM 19" from late model V35...

V35 coupe also come with this size from factory, exactly like 350Z, despite both 18" rims has 8" wide front and back... don't ask me why, I think Nissan should have made the front ones 7" or 7.5" as it shown on my OEM rims the 8" wide with skinny 225 tyre at the front caused the previous owner in Japan scratch the rims badly on japanese gutter.

[Eldubb]

as it shown on my OEM rims the 8" wide with skinny 225 tyre at the front caused the previous owner in Japan scratch the rims badly on japanese gutter.

My 18" have also bad gutter rash from japan because of this. so we all agree if i go 19 x 9, i'll try to get the 245/35 front and 275/35 back?

Edited July 4, 2009 by Eldubb

[MILLOS]

Hey Eldubb,

I'm looking at exactly the same issue too. So did you buy the 19" at 245/35f and 275/35r?

Also for the guys that know, the offsets that are supposed to best suit the V35 are in the teens, i.e. +15.

The guys at the tyre shop were offering me +30's offset, what is the difference? How will it affect the ride?

In terms of rim, they have Work wheels, which are beautiful, but a little pricey of course.

They also have Taiwanese made wheels, which look great, but a lot heavier and cheaper, what do you guys think?

[Eldubb]

I havent bought anything yet. Still wanting to make sure i can offload my current wheels and tyres after i buy the new ones. and im still waiting to hear back for a good deal on a package.

[rs73]

Standard offset on V35 coupe is +30 front and back...

My aftermarket is +30 front and +25 rear. There is no need to go to +15... the more the difference in offset that can cause more strain to the hub, causing premature wear on hub bearings....

[MILLOS]

aha, thanks Rianto.