my new wheels 18 inch AC schnitzer reps - tyres?
-
- Joined: Fri 18 Apr, 2008 19:24
- Posts: 1446
- Location: woking
my new wheels 18 inch AC schnitzer reps - tyres?
Morning everyone
Well I have purchased my 5th set of wheels for the Zed.
These are my next project.
Just a quick question about tyres
The wheels are (all)
ET38
18x8.5J
What tyre size do I need?
255/35 rear
225 or 235/40 front?
They have come with a real mixture of tyres!
Well I have purchased my 5th set of wheels for the Zed.
These are my next project.
Just a quick question about tyres
The wheels are (all)
ET38
18x8.5J
What tyre size do I need?
255/35 rear
225 or 235/40 front?
They have come with a real mixture of tyres!
we expres: " He did hear the bells ringing, but doesnt know where where the clapper hangs".
-
- Joined: Tue 09 Feb, 2010 22:39
- Posts: 204
- Location: Swansea
These are the sites that I used when choosing tyres for mine:
http://www.willtheyfit.com/index.php?wi ... mit=Submit
http://www.tyrestretch.com/
Hope it helps!!
http://www.willtheyfit.com/index.php?wi ... mit=Submit
http://www.tyrestretch.com/
Hope it helps!!
You are trying to keep the diameter of the front and back almost the same.simonbud100 wrote:Sorry to ask a thick question but why have a lower profile on the rear? My car is fitted with exactly the same fitments as above, hence the question.Dav wrote:Personally I would go 225/40/18 front and 255/35/18 rear.
The overall diameter is made up of the wheel, in this case 18 inches, plus the section height of the tyre. The section height is the distance from the wheel rim to the edge of the tyre.
The section height is calculated by taking a percentage of the width of the tyre.
In your case, in simple terms, 225/40 (fronts) the tyre is 225mm wide with a 40 profile so 40% of 225 is 90mm. The rears are 255/35 so this is 255mm wide and the profile is 35 so 35% of 255 is 89.25mm and therefore the fronts and rears are keeping almost identical diameters.
Hope this helps
Dav the wheel nut
-
- Joined: Tue 09 Feb, 2010 22:39
- Posts: 204
- Location: Swansea
-
- Joined: Fri 18 Apr, 2008 19:24
- Posts: 1446
- Location: woking
Fitted today, Continental Contact sport 3 on rears 255 35 18 and pirelli rossa 235 40 18 on front.
Not sure the pirellis will last long, seemed a little scuttley on the way to the body shop for my nose job!
I like the look of them though!
What do you lads and lasses think?
Not sure the pirellis will last long, seemed a little scuttley on the way to the body shop for my nose job!
I like the look of them though!
What do you lads and lasses think?
we expres: " He did hear the bells ringing, but doesnt know where where the clapper hangs".
-
- Joined: Fri 18 Apr, 2008 19:24
- Posts: 1446
- Location: woking
Bit like my old ones,
Last edited by gookah on Mon 19 Dec, 2011 17:25, edited 2 times in total.
Z3 2.8 Progress Journal (Mine)
Z3 1.9 Sport Progress Journal (Wifey's)
I have an element of 'M-styling' on my car, If that's a good enough reason for the manufacturers to adorn a 320 with the M badge, then its certainly a good enough reason for me..
-
- Joined: Fri 18 Apr, 2008 19:24
- Posts: 1446
- Location: woking
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Gents, need a bit of help please. I have similar 18 inch 8.5J wheels but appear to have a ET40 offset. The fronts are fitted with 235/40 and the rears 245/40. I need to replace all 4 tyres and am concerned about the fronts as they currently appear to foul the inner arch on full lock. What size tyres should I be fitting (front and rear) and do I require spacers?
Thanks in advance
Thanks in advance
1999 2.8 Arctic Silver Z3
1987 Black Renault Alpine GTA V6 Turbo
2007 325d Msport - remapped
1987 Black Renault Alpine GTA V6 Turbo
2007 325d Msport - remapped
Re: my new wheels 18 inch AC schnitzer reps - tyres?
225/40/18 shouldn't give you any problems
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
On the fronts only Gaz? Was thinking 225/35 on the rear?
1999 2.8 Arctic Silver Z3
1987 Black Renault Alpine GTA V6 Turbo
2007 325d Msport - remapped
1987 Black Renault Alpine GTA V6 Turbo
2007 325d Msport - remapped
Re: my new wheels 18 inch AC schnitzer reps - tyres?
225 on the rear will look a little small IMO
Spacers aren't needed on the front with 8.5" and ET40
245/45 is normal for the rear even on 7.5" rims
Spacers aren't needed on the front with 8.5" and ET40
245/45 is normal for the rear even on 7.5" rims
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
The Schnitzers on mine 8.5x18 ET43 or ET36 with 7mm spacers front and rear were fitted with 225/40 fronts and 255/35 rears. IMHO 235 is too wide for the fronts and increases the possibility of tramlining.
I'm now running 225/40 on 8x18 rims front and rear and in all honesty they look fine on the rears, yes you don't quite get that wide tyre stance when looking at the rear but the biggest bonus I've found is in the handling, the Zed just feels much more nimble and chuckable in the corners. The wider rears somehow seem to make the car more leaden and slow whitted. With going for all season tyres which are softer compound the ride is much better too
Tim.
I'm now running 225/40 on 8x18 rims front and rear and in all honesty they look fine on the rears, yes you don't quite get that wide tyre stance when looking at the rear but the biggest bonus I've found is in the handling, the Zed just feels much more nimble and chuckable in the corners. The wider rears somehow seem to make the car more leaden and slow whitted. With going for all season tyres which are softer compound the ride is much better too
Tim.
Re: my new wheels 18 inch AC schnitzer reps - tyres?
The addition of spacers does not alter the ET of the rim. The ET is the measure of offset from the centre line of the wheel to the mounting surface.TitanTim wrote:The Schnitzers on mine 8.5x18 ET43 or ET36 with 7mm spacers front
Tim.
The higher ET puts the mounting surface toward the outside of the rim.
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Not physically but theoretically for e.g. a wheel with an offset of ET43 if you fitted a 7mm spacer pushes it out making it in theory the same as wheel that was manufacutured with an ET36 offset? i.e. it makes the offset lower or am I talking or should read theGazza wrote:The addition of spacers does not alter the ET of the rim. The ET is the measure of offset from the centre line of the wheel to the mounting surface.TitanTim wrote:The Schnitzers on mine 8.5x18 ET43 or ET36 with 7mm spacers front
Tim.
The higher ET puts the mounting surface toward the outside of the rim.
Tim.
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Correct, if you add a 10mm spacer it effectively reduces the offset of the wheel by 10mm.
ET43 Wheel + 10mm spacer = Effective ET33
ET43 Wheel + 10mm spacer = Effective ET33
2001 M roadster S54 Laguna Seca Blue
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Cheers si thats kinda what I was thinkingsiwilson wrote:Correct, if you add a 10mm spacer it effectively reduces the offset of the wheel by 10mm.
ET43 Wheel + 10mm spacer = Effective ET33
Tim.
Re: my new wheels 18 inch AC schnitzer reps - tyres?
You're both wrong.
Theoretical and effective don't come into it, by adding spacers you only change the position of the whole rim relative to the mounting surface. ET or offset is the difference between mounting surface and the edge of the rim.
If I stand on a 6" box I'm not now 6'6" tall, I'm still 6' but standing on a box !
Theoretical and effective don't come into it, by adding spacers you only change the position of the whole rim relative to the mounting surface. ET or offset is the difference between mounting surface and the edge of the rim.
If I stand on a 6" box I'm not now 6'6" tall, I'm still 6' but standing on a box !
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
I'm still not convinced Gary I know what your saying though :winkGazza wrote:You're both wrong.
Theoretical and effective don't come into it, by adding spacers you only change the position of the whole rim relative to the mounting surface. ET or offset is the difference between mounting surface and the edge of the rim.
If I stand on a 6" box I'm not now 6'6" tall, I'm still 6' but standing on a box !
Surely fitting spacers changes that difference as you say between the hub and outer face of the rim and that's the change in offset:?
Tim.
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Fitting spacers only pushes the whole rim out, the ET of the wheel remains the same.
Perhaps this will make it clearer http://www.1010tires.com/WheelOffsetCalculator.asp
Perhaps this will make it clearer http://www.1010tires.com/WheelOffsetCalculator.asp
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
Gazza wrote:Fitting spacers only pushes the whole rim out, the ET of the wheel remains the same.
Perhaps this will make it clearer http://www.1010tires.com/WheelOffsetCalculator.asp
AC spacers are permanently fitted to the wheel using a spring clip so that they are always on the wheel, and are not fitted to the hub, so this has indeed made the 'wheel' a different offset as the position of the mating faces is now different.....
Z3 2.8 Progress Journal (Mine)
Z3 1.9 Sport Progress Journal (Wifey's)
I have an element of 'M-styling' on my car, If that's a good enough reason for the manufacturers to adorn a 320 with the M badge, then its certainly a good enough reason for me..
Re: my new wheels 18 inch AC schnitzer reps - tyres?
I'm afraid your all wrong..
Spacers = cool dude
No spacers = booooo!
Nuff said..
Spacers = cool dude
No spacers = booooo!
Nuff said..
///M Roadster - Evolve Stage 3
Re: my new wheels 18 inch AC schnitzer reps - tyres?
gookah wrote:Gazza wrote:Fitting spacers only pushes the whole rim out, the ET of the wheel remains the same.
Perhaps this will make it clearer http://www.1010tires.com/WheelOffsetCalculator.asp
AC spacers are permanently fitted to the wheel using a spring clip so that they are always on the wheel, and are not fitted to the hub, so this has indeed made the 'wheel' a different offset as the position of the mating faces is now different.....
Agreed, the wheel now has a different offset/ET
Fitting a spacer to the hub does not change the offset/ET of the wheel, fitting a spacer to the wheel does. It is the relationship between centreline of the wheel to the mounting surface of the wheel that gives the offset/ET figure.
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
Re: my new wheels 18 inch AC schnitzer reps - tyres?
The box doesn't change my height, only my relationship to the ground.
If the box was surgically applied to my feet then I would have a height of 6'6"
Think of the spacer as the box
If the box was surgically applied to my feet then I would have a height of 6'6"
Think of the spacer as the box
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe