18x10" rear wheels - tire size & fit?

[ToSi]

What tire size are you guys using w/ an 18x10et47 wide rear wheel? I've been holding off buying since the wheels I'm considering (Wheel Dynamics LW replicas) only come in a 10" rear width. My car is a 2.5 so I'd rather not go wider than a 265/35 rear but worry that the 10" wheel will leave the tire too 'stretched'. I don't care for the euro-tuner look & would prefer to have some protection against the occasional curb bump while parking. Anyone have pictures of 265's or 275's mounted on 10" rear wheels?

So far the best compromise seems to be a 275/35-18 rear, same overall size as a 275/40-17 which many people report works just fine. The effact on gearing are the only thing from making this a no-brainer. The 2.5 already lacks grunt & the heavier wheels + taller final drive would make this worse. Subjectively, how much perceived (or better yet, measured) performance is lost w/ the taller rear tires?

The matching fronts would be either 235/40-18 or 245/35-18. Can anyone confirm or deny that these fit w/ no issues on an 18x8 ET50 front wheel? By 'no-issue' I mean absolutely no rubbing or contact w/ either the strut, liner, or outside fender. I'm hoping to maintain ~30mm stagger as this is for street use. Are the 245's wide enough to pelt the side of the car w/ road grit?

For grins, I tried fitting the 255/40-17x8.5et50 stock rears in the front last spring - rubbed the front of the inner liner during turns & barely fit under the fenders while looking down from the top. Certainly would have cause lots of rocks to hit the sides of the car.

Currently have the stock suspension installed & PSS9's in box waiting to go in. Ideally, the wheels would fit w/ both just in case the PSS9's don't work out & I change them out for ROW M030.

Thanks!

[insite]

What tire size are you guys using w/ an 18x10et47 wide rear wheel? I've been holding off buying since the wheels I'm considering (Wheel Dynamics LW replicas) only come in a 10" rear width. My car is a 2.5 so I'd rather not go wider than a 265/35 rear but worry that the 10" wheel will leave the tire too 'stretched'. I don't care for the euro-tuner look & would prefer to have some protection against the occasional curb bump while parking. Anyone have pictures of 265's or 275's mounted on 10" rear wheels?

So far the best compromise seems to be a 275/35-18 rear, same overall size as a 275/40-17 which many people report works just fine. The effact on gearing are the only thing from making this a no-brainer. The 2.5 already lacks grunt & the heavier wheels + taller final drive would make this worse. Subjectively, how much perceived (or better yet, measured) performance is lost w/ the taller rear tires?

The matching fronts would be either 235/40-18 or 245/35-18. Can anyone confirm or deny that these fit w/ no issues on an 18x8 ET50 front wheel? By 'no-issue' I mean absolutely no rubbing or contact w/ either the strut, liner, or outside fender. I'm hoping to maintain ~30mm stagger as this is for street use. Are the 245's wide enough to pelt the side of the car w/ road grit?

For grins, I tried fitting the 255/40-17x8.5et50 stock rears in the front last spring - rubbed the front of the inner liner during turns & barely fit under the fenders while looking down from the top. Certainly would have cause lots of rocks to hit the sides of the car.

Currently have the stock suspension installed & PSS9's in box waiting to go in. Ideally, the wheels would fit w/ both just in case the PSS9's don't work out & I change them out for ROW M030.

Thanks!

i've run 265/35's, 275/35's and 285/30's. i prefer the 275 since it's generally got a higher load rating than the 265 and is far cheaper than the 285 since the aspect ratio is still 35 (when you drop to 30 aspect ratio, the price goes way up)

[ToSi]

Do you have a photo of the 265 & 275 on a 10" wheel? How much (if at all) does the rim protrude for each tire size? Thanks!

[insite]

Do you have a photo of the 265 & 275 on a 10" wheel? How much (if at all) does the rim protrude for each tire size? Thanks!

this pic shows the 275's. the really don't stick out at all; they're flush with the fenders.

[hypernominal]

Here are my 265s on the 10" rear wheel.

[chillo]

I'm looking at some Carrera 5 spokes: 10jx18 h2 et65 alloy wheels , with 265/35zr18 tyres for a 03my boxster S!

Will they fit ok or will i need spacers! not really sure about suitable sizes safe to use etc! (these wheels are originally from a 996)

[Paul Fraser]

Chillo, those won't fit your Boxster at the rear. You need 9J wheels (which have a 50 or 52 or 55 ET, I forget), at the back and 7.5/8Js at the front.

To fit the 10J ET65s you'll need 18m spacers.

Check for yourself here: http://www.1010tires.com/WheelOffsetCalculator.asp?

[chillo]

Just got a set of OEM Carrera 5 spokes with reasonable tires which i could not ignore at a great price, No coloured centres though, but cant complain.

8j50et 225x40x18 front

10j65et 285x30x18 rear

I have a set of 18mm spacers which came with the wheels, the calculator does say there is 36mm LESS inner clearance?

will probably put a couple of new tires on before i fit,

not sure if i will need a set of spacers for the front?? 5mm??

anyone used these sizes?! any problems? tramlining? rubbing?

Can i use the coloured centres from the standard boxsterII 17" wheels?

Edited April 2, 2007 by chillo

[Paul Fraser]

I assume the 36mm LESS is before the spacers? That's the problem, you can't physically locate them on the hub as you hit the strut behind the hub.

I'd try the wheels on the car before buying new tyres just to check, it'll only take a couple of hours.

Fairly sure you won't require spacers, again, give it a go first.

18"is not approved for 1997 cars, how old is yours?

You can swap the 17" centres over to the new wheels.

Piccies if you can manage them when you are finished :)

[chillo]

I assume the 36mm LESS is before the spacers? That's the problem, you can't physically locate them on the hub as you hit the strut behind the hub.

I'd try the wheels on the car before buying new tyres just to check, it'll only take a couple of hours.

Fairly sure you won't require spacers, again, give it a go first.

18"is not approved for 1997 cars, how old is yours?

You can swap the 17" centres over to the new wheels.

Piccies if you can manage them when you are finished :)

Its an 03my 'S'

I'm assuming that the 36mm figure is before the spacers, i just entered the stock size (8.5j et48/50) and the 18's size (10j et65) into the calculator and thats what it says.

I paid £530 for the 4 wheels/tires +spacers/bolts so i thought its worth a punt!

will post piccies, here is stock:

will try the wheels sometime this week.

[insite]

Just got a set of OEM Carrera 5 spokes with reasonable tires which i could not ignore at a great price, No coloured centres though, but cant complain.

8j50et 225x40x18 front

10j65et 285x30x18 rear

I have a set of 18mm spacers which came with the wheels, the calculator does say there is 36mm LESS inner clearance?

will probably put a couple of new tires on before i fit,

not sure if i will need a set of spacers for the front?? 5mm??

anyone used these sizes?! any problems? tramlining? rubbing?

Can i use the coloured centres from the standard boxsterII 17" wheels?

my rears are the same size and offset; i use 21mm spacers. anything much less would hit the struts.

Edited April 2, 2007 by insite

[chillo]

my rears are the same size and offset; i use 21mm spacers. anything much less would hit the struts.

Do you have any pics?

thanks!

[insite]

Do you have any pics?

here's a few. oddly, i don't think i've ever taken a picture of both cars before, so here's the entire stable (all two of 'em):

[chillo]

my rears are the same size and offset; i use 21mm spacers. anything much less would hit the struts.

You are correct!!

With the wheels i just got where a set of 18mm spacers, put the wheels on tonight and they rub the strut!!

Going to see if i can get some 21mm spacers tomorrow!!

[insite]

my rears are the same size and offset; i use 21mm spacers. anything much less would hit the struts.

You are correct!!

With the wheels i just got where a set of 18mm spacers, put the wheels on tonight and they rub the strut!!

Going to see if i can get some 21mm spacers tomorrow!!

FYI, any Porsche hubcentric spacers for 911's, 944's, etc will fit. i got mine off ebay for like $20. i got the bolts from german parts and restoration.

[chillo]

FYI, any Porsche hubcentric spacers for 911's, 944's, etc will fit. i got mine off ebay for like $20. i got the bolts from german parts and restoration.

Just had a look under the arches and the handbrake cable was touching on both sides, pushed them out of the way and it seems to be ok on the r/h side but on the l/h side the actual wheel is only just scraping the shock.

Should i just run it and the scraping might clear after it has rubbed for a few miles? (i'm talking hair width that is touching)

Edited April 4, 2007 by chillo

[insite]

Just had a look under the arches and the handbrake cable was touching on both sides, pushed them out of the way and it seems to be ok on the r/h side but on the l/h side the actual wheel is only just scraping the shock.

Should i just run it and the scraping might clear after it has rubbed for a few miles? (i'm talking hair width that is touching)

nope. as your wheel bearings get old, there will be some play in the hub. you will damage the strut when you hit bumps, etc. get the right spacers.

[chillo]

Just had a look under the arches and the handbrake cable was touching on both sides, pushed them out of the way and it seems to be ok on the r/h side but on the l/h side the actual wheel is only just scraping the shock.

Should i just run it and the scraping might clear after it has rubbed for a few miles? (i'm talking hair width that is touching)

nope. as your wheel bearings get old, there will be some play in the hub. you will damage the strut when you hit bumps, etc. get the right spacers.

Sorry, ignore my last post! serious brainfart there! :)

[Paul Fraser]

So do they fit with 18mm spacers? I am curious as that is what I bought from Jasmine Motorsport at their suggestion.

[chillo]

So do they fit with 18mm spacers? I am curious as that is what I bought from Jasmine Motorsport at their suggestion.

UPDATE!

Put the standard wheels back on and there is still a scraping noise! but only from l/h side as with the 18" wheels! argh!!

Take the l/h side rear wheel off and i cant see anything catching?

Take caliper off, remove the disk and some pieces of spring fall out! (2 springs)

I'm assuming they are from the handbrake assembly???

here is a pic:

what are they for? Can i disable the handbrake on one side until i get some new springs depending on if they are needed??

The 18mm spacers i have are from Jasmine too!

pic with the wheels fitted!

So it would appear the wheels do fit with 18mm spacers!!

ps

sorry for the thread hijack!

Edited April 5, 2007 by chillo

[chillo]

I have removed the hand brake shoe so i can use the car this weekend until i get a new tension spring.

Will just have to leave it in gear when parking!

[insite]

don't use your e-brake; just leave the car in gear until you get new springs. it looks like maybe your wheel lug bolts are a tad too long and perhaps hitting some e-brake components.