hi guys, ive just picked up my new 18" rs4 wheels and tyres today, i fit the first wheel on the drivers side front and lowered the car and im just a little concerned that they arent the right offset? they are touch and go to being outside the wheel arch. they are 225/40/18 and on the back of the wheel it says 8-18 im assuming that this is the offset? (octavia vrs 52 reg)

just want to make sure they are right before i fit the wheels because obviously once ive driven on them i cant exchange them. i have put the standard rim back on for now until i know more.

PLEEEEEEEEEESE Help,, im dying to fit them they look sweet

thanks for your help

nick

hi guys, ive just picked up my new 18" rs4 wheels and tyres today, i fit the first wheel on the drivers side front and lowered the car and im just a little concerned that they arent the right offset? they are touch and go to being outside the wheel arch. they are 225/40/18 and on the back of the wheel it says 8-18 im assuming that this is the offset? (octavia vrs 52 reg)

just want to make sure they are right before i fit the wheels because obviously once ive driven on them i cant exchange them. i have put the standard rim back on for now until i know more.

PLEEEEEEEEEESE Help,, im dying to fit them they look sweet

thanks for your help

nick

Hi Nick

Recently fitted 18 RS6 reps to mine which were the same 8x18 225/40 size. Hope i have got this right but if not i am sure somebody will correct me. The 8 x 18 refers to the width and diameter of the wheels. The offset should be 35 so i would confirm that this is the case with where / who you have got them from.

Hope this helps

The off-set is indicated on the wheel ( probably on the inside ) by the 'ET' number. Thus ET50 means an off-set of 50mm.

If they are the same as my RS4 reps then the offset should be ET35 on a 18x8" wheel.

When I fitted mine I thought the wheels looked like they were protruding out from the arch but I had the car jacked up one side which made it deceiving.

Try them all and see when the car in on the deck.,

If they are the same as my RS4 reps then the offset should be ET35 on a 18x8" wheel.

When I fitted mine I thought the wheels looked like they were protruding out from the arch but I had the car jacked up one side which made it deceiving.

Try them all and see when the car in on the deck.,

ok ill try that in the morning, im going to go and check the et number now and see what it is.

thanks again guys.

Haha it's a bit risky buying wheels if you don't know their offset! KInda important! Too little offset will be better than too much, as my friend with a Bora found out.

He fitted R32 reps to his Bora on coilovers and the tyres rubbed on the struts, so had to fit spacers. The goon!

To maintain the same hubface to wheel backface distance as the standard 7" wide wheels, you'd need an offset of 25mm on 8" wide wheels. But 35mm seems fine, as most wheels are.

Have been out and double checked mine and they def read ET35

ok ive just been out to the garage and checked the back of the wheels and it has ET 35 on them. the only thing that seems odd is that the ET looks like it was part of the moulding process as it is pronounced on the alloy and sprayed over, whilst the 35 has been stamped onto the wheel next to the ET using a punch and is recessed into the alluminium?

any input on that would be appreciated.

ok ive just been out to the garage and checked the back of the wheels and it has ET 35 on them. the only thing that seems odd is that the ET looks like it was part of the moulding process as it is pronounced on the alloy and sprayed over, whilst the 35 has been stamped onto the wheel next to the ET using a punch and is recessed into the alluminium?

any input on that would be appreciated.

Exactly the same as mine mate but i couldn't tell you why it is like that

Haha it's a bit risky buying wheels if you don't know their offset! KInda important! Too little offset will be better than too much, as my friend with a Bora found out.

He fitted R32 reps to his Bora on coilovers and the tyres rubbed on the struts, so had to fit spacers. The goon!

To maintain the same hubface to wheel backface distance as the standard 7" wide wheels, you'd need an offset of 25mm on 8" wide wheels. But 35mm seems fine, as most wheels are.

hi bodge, i did tell the wheel company what car it was going on and they told me what i needed?

it seems they have given me the 35mm offset wheels so should be ok, they just look very close to protruding past the wheel arch?

as you say though there seems to be a few members who have fit wheels with this ofset so should be ok

Exactly the same as mine mate but i couldn't tell you why it is like that

hi taz, do you have the same size 225/40/18 8-18 et35 on your car as well, and would you say that yours are close to the outside of the wheel arch?

it looks as though if i put a ruler straight against the side of the wheel arch and down to the wheel it may be sticking out a few mm further than the arch?

im not being fussy about the look, its just the law im concerned with.

thanks

nick

hi taz, do you have the same size 225/40/18 8-18 et35 on your car as well, and would you say that yours are close to the outside of the wheel arch?

it looks as though if i put a ruler straight against the side of the wheel arch and down to the wheel it may be sticking out a few mm further than the arch?

im not being fussy about the look, its just the law im concerned with.

thanks

nick

Exactly the same size but rs6 reps purchased from wheel-base. They are closer to the arch than the standard rims but not so it causes any probs mate.

I have attached a couple of pics for you to have a look but not sure if they are going to be close up enough to help you out. If not let me know and i will take a couple more close up tomorrow morning and post them up

hi taz, do you have the same size 225/40/18 8-18 et35 on your car as well, and would you say that yours are close to the outside of the wheel arch?

it looks as though if i put a ruler straight against the side of the wheel arch and down to the wheel it may be sticking out a few mm further than the arch?

im not being fussy about the look, its just the law im concerned with.

thanks

nick

Trust me you are ok if your wheels are ET35 yours are identical to mine and they do not protrud. They look good actually as they fill the arch nice.

Here are my pics again just to show you.

Edited 29 March, 201016 yr by Bowders1

Trust me you are ok if your wheels are ET35 yours are identical to mine and they do not protrud. They look good actually as they fill the arch nice.

Agree

Agree

thanks again taz & bowders, your right about it looking good that close to the edge of the arch, i just wanted to make sure it wasnt going to be law breaking that close.

ive got to to say both your cars look awesome and tommorow mine is going to look just like yours bowders just a little higher of the ground mines also in silver - the best colour

thanks again taz & bowders, your right about it looking good that close to the edge of the arch, i just wanted to make sure it wasnt going to be law breaking that close.

ive got to to say both your cars look awesome and tommorow mine is going to look just like yours bowders just a little higher of the ground mines also in silver - the best colour

Make sure you get some pics up mate

Make sure you get some pics up mate

will do, I'll try and get some on tommorow.

Thanks again for your advice guys.

looking forward to pics...

PS mine are S8 replica's 8x18 but with ET42. This ET value is also accepted on an Octavia as some of the OEM wheels have this offset. The wheels sit 7mm deeper in the arches compared to ET35

Cheers

B

Edited 29 March, 201016 yr by berre

looking forward to pics...

PS mine are S8 replica's 8x18 but with ET42. This ET value is also accepted on an Octavia as some of the OEM wheels have this offset. The wheels sit 7mm deeper in the arches compared to ET35

Cheers

B

Ahh that's good to know. Do you get any rubbing on the strut or arch liner?

I always work on offsets based on the 7x17" ET38 vRS alloys. So your wheels move the inner rim edge in by 17mm compared the vRS wheels. If you get away with that then awesome.

It means it opens up the options for new wheels hugely. I've been looking at some Subaru Impreza 7x17" 5x100 ET45 wheels, but didn't think I'd have the clearance. Sounds like I do!

ok ive just been out to the garage and checked the back of the wheels and it has ET 35 on them. the only thing that seems odd is that the ET looks like it was part of the moulding process as it is pronounced on the alloy and sprayed over, whilst the 35 has been stamped onto the wheel next to the ET using a punch and is recessed into the alluminium?

any input on that would be appreciated.

The reason why the 'ET' is cast in the wheel & the Number is stamped in the wheel ( e.g. 35 ) is that the wheel casting is cast with a machining allowance on the hub mounting surface for different off-sets . Thus say an off-set of 40mm is required then hub surface will be machined to dimension 'X' . If an off-set of 35mm is required then hub surface will be machined to dimension 'X' + 5mm. This enables different off-sets to be made from the same wheel casting.The actual off-set is then stamped ( or engraved ) on the wheel after machining .

Edited 30 March, 201016 yr by vwcabriolet1971

Ahh that's good to know. Do you get any rubbing on the strut or arch liner?

I always work on offsets based on the 7x17" ET38 vRS alloys. So your wheels move the inner rim edge in by 17mm compared the vRS wheels. If you get away with that then awesome.

It means it opens up the options for new wheels hugely. I've been looking at some Subaru Impreza 7x17" 5x100 ET45 wheels, but didn't think I'd have the clearance. Sounds like I do!

no rubbing what so ever, full turn is also possible without any rubbing... The clearance between wheel and suspension however is not much (I can't get my finger in between) so best to try out the ET45 first before you buy.

If I would change wheels I would def go for ET42 again!

cheers

B

Maybe I should have added that it essential that the correct bolt lengths are used for non- standard wheels . Normally the standard bolt length for steel wheels is made to the maximum length for steel wheel application so that this bolt length can be used for the standard factory alloy wheel fitment with it's thicker middle boss.

The reason why the 'ET' is cast in the wheel & the Number is stamped in the wheel ( e.g. 35 ) is that the wheel casting is cast with a machining allowance on the hub mounting surface for different off-sets . Thus say an off-set of 40mm is required then hub surface will be machined to dimension 'X' . If an off-set of 35mm is required then hub surface will be machined to dimension 'X' + 5mm. This enables different off-sets to be made from the same wheel casting.The actual off-set is then stamped ( or engraved ) on the wheel after machining .

ahh that makes sense now, they say you learn something new every day.

thanks

nick