stevie1982

iTrader: (16)

Just out of interest as i am looking for either a set of 17 or 18 alloys to fit my99 sti 5

what is the best offset

be it on a 17x7.5

also what about for a 18x7.5 and would that chnage if the alloy was slightly wider 18x8

would an ET48 be what i need

cheers

steve

Dave270R

17x8 ET48 is what my missus has on hers

stevie1982

iTrader: (16)

this is doing my head in trying to find the correct offset, alloy width and tyre size to run on a classic, cant find it anywhere

g7prs

iTrader: (5)

There should be hundreds of threads on this.

My revolution milleniums are 7.5 x 18 ET 48 and i am sure the tyres are 215 35 18.

I was tempted to go 8" wide but was worried about them rubbing.

stevie1982

iTrader: (16)

mate where did you get them from? as i can only come across the 8" width and same as you i think they will rub too much.

been looking for the answer but i must be searching it wrong as i am coming up with very little

Quasi Modo

what's the standard 16" offset then? I've got 16" WRX Subaru wheels.

stevie1982

iTrader: (16)

also from what i have seen the correct offset that came out of the factory aloys was ET53 and this will sound dumb but by getting an offset ET48 what dies that do to the position of the alloy then i would assume it would make the alloy stick out further to the outer edge?

g7prs

iTrader: (5)

Stevie i got my wheels from these guys

Cheap Tyres. Next Day Delivery. Westgate Tyres

also found these ones on ebay

REVOLUTION MILLENIUM ALLOY WHEELS YOKOHAMA TYRES on eBay (end time 21-Jan-10 15:46:56 GMT)

stevie1982

iTrader: (16)

G7PRS - cheers for that mate, can i ask with the alloys size, et and tyre size do you get any rubbing etc on full lock or with people in the back. just i love the milleniums and really want a set but i am worried about them catching

g7prs

iTrader: (5)

I have never had an issues with mine, i only rarely have other people in the car with but have had it with four at speed and no issues

domino555

Here is a link that allows you to see different offset's

Wheel / tire size calculator / comparer - RIMS-N-TIRES

Just put in your spec's.

172sport

iTrader: (6)

7.5 x 17 here ET 48

Quasi Modo

Steviie1982 are yours original Subaru wheels? I think mine are 205 55 16 tyres. I'll have a nose about as there's nothing here.

53

iTrader: (41)

Steve, choose the wheel you like first. Offset to a certain degree, is design dependent.

I wouldn't run 18's out of preference due to the rubber band you have to run for tyres ! 215/45/17 is doable for a bit more comfort, but 215/40/17 works well using a good tyre such as the Vredestein Sessanta which as a chunkier tyre covers the rim as if you were running 225.

Quasi Modo

MY94-97 55mm offset

MY98-00 53mm offset

MY02-04 STi 53mm offset

MY01-05 55mm offset

Forester XT rim 48mm offset

stevie1982

iTrader: (16)

ok so my 99 is a et53 offset

what will happen by going to a et48 then? i mean if they are the same size say 7.5x17

sorry for all the all the stupid questions

stevie1982

iTrader: (16)

sorry mate what do you mean 18's out of preference due to the rubber band?

i have found a set of milleniums one choice is 8x18 or 7.5x18 as i have a set of 17 oz on the car at the minute but i want to use them to do track days so i am after a set of 18's for looks and day to day stuff.

172sport

iTrader: (6)

They will stick out 5mm further in the arches.

stevie1982

iTrader: (16)

172sport - thanks for that mate so the lower the offset the closer it gets to the arch

as silly as this sounds i have neer really understood.

so thats the offset done but what is the lowest and highest offset you can get away with on a classic? would we say et53-et48?

and what is the widest rim to run 7.5 or 8 and if you went for an 18 i would guess you need to get a et53 or would say a et48 be ok

172sport

iTrader: (6)

I dont think you would have any issues running either, given the rolling radius would be pretty much the same.
After all, Prodrive run 18's on the P1 with 215/35/18

TonyBurns

iTrader: (3)

48-53 are ideal, anything smaller or bigger are not.

Tony

stevie1982

iTrader: (16)

cheers 172clio - although does anyone know the width of the 18 p1 alloy is it 7.5 or 8 cheers

thanks tony - i will stick to those two offsets and cross my fingers lol

Anger

iTrader: (4)

I ran ET35 on my RA with rolled arches without any catching

53

iTrader: (41)

That ET assumes OEM brake set up Steve, what you got for stoppers on the beastie ?

Tyres are like rubber bands on 18's, 35% of 215 is not alot

stevie1982

iTrader: (16)

i have got a set of AP 4 pots on the front although one day i might go to 6 pots but i need to get the car on the track to see how they go if they are good then the 4 pots will stay if not i will change them.

so as it stands i have AP 4 pots.

53

iTrader: (41)

So you really need to search for/post for 'wheels that clear AP4Pots'.

On my classic I run the following to clear my STi10/9 Front and rear Brembos.

17x7.5 ET48 Rota Torques clear STi Brembos
17x7.5" ET53 STi8 Wheels Clear STi Brembos

Ideally you want 17", and no more than 7.5" wide, so you can run tyres that wont rub on a slightly lower offset as well as covering as much rim as possible

53

iTrader: (41)

18x7.5" PWRC1 (P1) wheels are ET53 and ET46, the latter being STi fitment to clear the Brembos.

g7prs

iTrader: (5)

The 18's fit fine with brembos



and yes the tyres are a bit thin

but they look the part

Grant74

iTrader: (10)

I have a standard wheel setup on my WR 98 Classic, which comes with 7.5 Rota GRA 17's (ET 48 I think), and I run 215/40's, and mine rub at the back!

Does my head in- cant work out why a factory setup would rub. They do clear Brembo's though.

stevie1982

iTrader: (16)

cheers for all your help chaps i appreciate it, so i am thinking a 17 or 18 with a width of 7.5 and i should be fine.

just one thing on the tyre front what would be the tyre size to run on a 17 and 18 alloy so there would be no rubbing or as little as possible

cheers