Alloy Wheel Help

[BladesGrant]

I don't have a clue about offsets and tyre size. I understand what the numbers are but don't want it all means together on the car. Looking at some wheels that are:

 

8.5 J x 18" 5x114 ET32 Front

9.5 J x 18" 5x114 ET35 Rear

 

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

I don't mind if I would need spacers but just not sure about the tyres with the front being 40 and rear 35. Will this be a problem or look weird?

 

Thanks

[Gaz Walker]

I don't have a clue about offsets and tyre size. I understand what the numbers are but don't want it all means together on the car. Looking at some wheels that are:

 

8.5 J x 18" 5x114 ET32 Front

9.5 J x 18" 5x114 ET35 Rear

 

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

I don't mind if I would need spacers but just not sure about the tyres with the front being 40 and rear 35. Will this be a problem or look weird?

 

Thanks

 

On the Zed you want 40 profile front and rear on 18" rims, and 35 profile on 19" rims

 

You should be able to get it at no extra cost if you ask I'd imagine.

[BladesGrant]

Cheers Gaz

[Husky]

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

from my understanding the sidewall is a percentage of the width

so front 234/100 * 40 = 93.6mm

& back 265/100 * 35 = 92.75mm

so on a normal car they would be fine as the front and back would have roughly the same circumference.

on the zed though back different to front.

[BladesGrant]

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

from my understanding the sidewall is a percentage of the width

so front 234/100 * 40 = 93.6mm

& back 265/100 * 35 = 92.75mm

so on a normal car they would be fine as the front and back would have roughly the same circumference.

on the zed though back different to front.

 

WHAT!!!!!

 

Was hoping for a yes they will fit fine or no need different tyres!!!

 

And my obvious mistake was that it should be a 235 not 234!! If I get them as:

 

235/40/18

&

265/40/18 I should be fine then?

[Lincolnbaggie]

Normal tyres are 225/45/18 on the front and the nearest match for that on 235 width is 235/45/18 (only 9mm difference on circumference), ie same sidewall

 

245/45/18 on back normally, so should be 265/40/18 to keep nearest the circumference if going for 265 wide (again only 9mm difference).

 

Basically the sidewall is given as a percentage of the width (ie 45% of 225 for the standard front), and you should aim to keep the rolling circumference the same as stock else your speedo will be out. Width of the tyre will depend on the width of the wheel (8.5 and 9.5 in your first post)

 

Play around on http://www.tyresave.co.uk/tyresize.html to see what differences it makes.

[BladesGrant]

To get that close on a 40 tyre I would need to go to 245 on the front, is this correct? Should just probably ask what the best tyre size would be for wheels that are:

 

8.5 J x 18" 5x114 ET32 Front

9.5 J x 18" 5x114 ET35 Rear

 

Think I just need telling what the right tyre size should be.

[Husky]

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

from my understanding the sidewall is a percentage of the width

so front 234/100 * 40 = 93.6mm

& back 265/100 * 35 = 92.75mm

so on a normal car they would be fine as the front and back would have roughly the same circumference.

on the zed though back different to front.

 

WHAT!!!!!

 

Was hoping for a yes they will fit fine or no need different tyres!!!

 

And my obvious mistake was that it should be a 235 not 234!! If I get them as:

 

235/40/18

&

265/40/18 I should be fine then?

 

sorry typed that really quickly youve probably muddled through by now though

[BulletMagnet]

I don't have a clue about offsets and tyre size. I understand what the numbers are but don't want it all means together on the car. Looking at some wheels that are:

 

8.5 J x 18" 5x114 ET32 Front

9.5 J x 18" 5x114 ET35 Rear

 

Tyre size is:

234/40/18 Front

265/35/18 Rear

 

I don't mind if I would need spacers but just not sure about the tyres with the front being 40 and rear 35. Will this be a problem or look weird?

 

Thanks

Just get some 5Zigen Z520+ in 18" and then you can just use the same tyres as they are on the Rays, job done!

I believe that Envy may be able to help you getting them if you fancy them

[BladesGrant]

I don't currently have rays, just the standard 18" wheel. Already seen the wheels I want but just don't trust the tyre size they are saying they come with (as above). Just doesn't seem right but I am no expert.

[BulletMagnet]

I don't currently have rays, just the standard 18" wheel. Already seen the wheels I want but just don't trust the tyre size they are saying they come with (as above). Just doesn't seem right but I am no expert.

Just hope they are not from DP Motorsport....cos your gonna literally get double penetrated if you order from them...

[Lincolnbaggie]

I don't currently have rays, just the standard 18" wheel. Already seen the wheels I want but just don't trust the tyre size they are saying they come with (as above). Just doesn't seem right but I am no expert.

 

I would say that for the fronts (8.5J) you need a 245 wide tyre, so 245/40/18 would be pretty spot on (only -1.06% from stock, 653 mm rolling diameter as compared to 660 mm stock)

Backs (9.5J) you would need probably a 265 wide tyre, so 265/40/18 would again be closest (only -1.33% from stock, 669 mm rolling diameter as compared to 678 mm stock) or you could go for 275 wide (275/40/18) which would be spot on compared to stock. Depends how stretched you want the tyre over the width of the wheel. Adam at Z1 probably would give you better guidance.

 

Certainly the tyre sizes they come with are not correct (the backs are over 5% different, and the fronts 2.27% different from stock). Hope that helps?

[BladesGrant]

I don't currently have rays, just the standard 18" wheel. Already seen the wheels I want but just don't trust the tyre size they are saying they come with (as above). Just doesn't seem right but I am no expert.

 

I would say that for the fronts (8.5J) you need a 245 wide tyre, so 245/40/18 would be pretty spot on (only -1.06% from stock, 653 mm rolling diameter as compared to 660 mm stock)

Backs (9.5J) you would need probably a 265 wide tyre, so 265/40/18 would again be closest (only -1.33% from stock, 669 mm rolling diameter as compared to 678 mm stock) or you could go for 275 wide (275/40/18) which would be spot on compared to stock. Depends how stretched you want the tyre over the width of the wheel. Adam at Z1 probably would give you better guidance.

 

Certainly the tyre sizes they come with are not correct (the backs are over 5% different, and the fronts 2.27% different from stock). Hope that helps?

 

Thats a great help thanks, I just wanted some to confirm my thoughts that the tyre sizes didn't look right. So do you think a 265 rear would look too stretched? Was definitely thinking that a 245/40/18 front was right, and like you have said would go for a 265/40/18 rear.

 

Thanks again for the help.

[Lincolnbaggie]

I don't currently have rays, just the standard 18" wheel. Already seen the wheels I want but just don't trust the tyre size they are saying they come with (as above). Just doesn't seem right but I am no expert.

 

I would say that for the fronts (8.5J) you need a 245 wide tyre, so 245/40/18 would be pretty spot on (only -1.06% from stock, 653 mm rolling diameter as compared to 660 mm stock)

Backs (9.5J) you would need probably a 265 wide tyre, so 265/40/18 would again be closest (only -1.33% from stock, 669 mm rolling diameter as compared to 678 mm stock) or you could go for 275 wide (275/40/18) which would be spot on compared to stock. Depends how stretched you want the tyre over the width of the wheel. Adam at Z1 probably would give you better guidance.

 

Certainly the tyre sizes they come with are not correct (the backs are over 5% different, and the fronts 2.27% different from stock). Hope that helps?

 

Thats a great help thanks, I just wanted some to confirm my thoughts that the tyre sizes didn't look right. So do you think a 265 rear would look too stretched? Was definitely thinking that a 245/40/18 front was right, and like you have said would go for a 265/40/18 rear.

 

Thanks again for the help.

 

Standard Rays rear is 8.5J and uses a 245 mm tyre, which is why I suggested that for the front for your 8.5J wheel. 9.5J is an inch wider (unless I'm being a complete muppet here), so ideally should be around 270 mm wide - I don't think you'd notice any difference between 265 and 275 in looks. I think standard 19 inch Nismo rears are 9.5J and they all seem to run 275 tyres, but get someone else to confirm that. The 275/40/18 certainly is closer to stock than 265/40/18 for rolling circumference and would have least effect on your traction control etc.

[BulletMagnet]

My rears are 19"x 10.5J and I run a 275/35/R19 tyre.

Hope this helps for reference

[dcash5]

9x18 front - 245/40/18

10x18 -rear 275/40/18

[BladesGrant]

9x18 front - 245/40/18

10x18 -rear 275/40/18

 

So will that be appropriate fitment for 8.5 front & 9.5 rear?

 

Think I have got the front tyres sorted by some above posts: 245/40/18 front. I presume it just looks slightly more stretched on your 9" wide wheel than it would on my 8.5".

[Stew]

The tyres Dan has mentioned will be fine for your application I'd imagine.

 

I think it will need spacers though with the offsets listed.

[BladesGrant]

The tyres Dan has mentioned will be fine for your application I'd imagine.

 

I think it will need spacers though with the offsets listed.

 

Thanks, and also thanks to everyone else involved. I have probably been thick with all this but want to make sure I get the right tyres.

[Ian]

The tyres Dan has mentioned will be fine for your application I'd imagine.

 

I think it will need spacers though with the offsets listed.

 

Spacers are definatley needed with those offsets

[BladesGrant]

The tyres Dan has mentioned will be fine for your application I'd imagine.

 

I think it will need spacers though with the offsets listed.

 

Spacers are definatley needed with those offsets

 

Will 20mm all round sort it out?

[Ian]

20mm will look great

[BladesGrant]

Thanks for everyone that has helped me. I have just ordered my new alloy wheels with some Falken 452s, can't wait for the delivery man now!!!