Correct Offset for alloy wheels?
#1
Scooby Regular
Thread Starter
Join Date: Apr 2002
Location: Essex
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
Hi,
I'm upgrading to 18" wheels (after market) (my95 wrx) and need the correct offset .. I have spoken to a few alloy wheel dealers and not one has given the same offset yet!!
Pls advise...
I'm upgrading to 18" wheels (after market) (my95 wrx) and need the correct offset .. I have spoken to a few alloy wheel dealers and not one has given the same offset yet!!
Pls advise...
#5
Scooby Regular
Join Date: Jul 2000
Location: Solihull
Posts: 1,498
Likes: 0
Received 0 Likes
on
0 Posts
If you are using 18" wheels on the older cars, the optimal offset for tyre clearance is ET53. The maximum wheel width is really a 7.5" but tou may get extra clearance by using a 7" wheel although this isn't ideal if using a 225 tyre.
You then need to chose the tyre carefully as they will catch on the rear arches if too large.
A 225/35x18 Pirelli PZero will clear, but the same size Bridgestone will not for example.
You would have no problems if using a 215/35x18 tyre though.
Regards
Mike
You then need to chose the tyre carefully as they will catch on the rear arches if too large.
A 225/35x18 Pirelli PZero will clear, but the same size Bridgestone will not for example.
You would have no problems if using a 215/35x18 tyre though.
Regards
Mike
#6
What Pete and Mike say is correct.
ET48 will do fine.
If you wanted some Speedlines with tyres, i posted a note about where and how much they were from Holland.
Damn site cheaper than a UK dealer!!
£1100 inc vat and delivery!!
ET48 will do fine.
If you wanted some Speedlines with tyres, i posted a note about where and how much they were from Holland.
Damn site cheaper than a UK dealer!!
£1100 inc vat and delivery!!
#7
Scooby Regular
Join Date: Aug 2000
Location: Where age and treachery reins over youthful exuberance
Posts: 5,275
Likes: 0
Received 0 Likes
on
0 Posts
TT, but Pete and Mike are saying different things! Care to qualify wheel width and tyre, Pete?
All I would say is that it's very tight in those rear arches and not all tyre brands of the same nominal size are the same actual size.
If it was my money, I wouldn't risk any wheel/tyre combination that I hadn't actually seen on a car and working okay.
Cheers,
Richard.
All I would say is that it's very tight in those rear arches and not all tyre brands of the same nominal size are the same actual size.
If it was my money, I wouldn't risk any wheel/tyre combination that I hadn't actually seen on a car and working okay.
Cheers,
Richard.
Trending Topics
#8
Scooby Regular
Thread Starter
Join Date: Apr 2002
Location: Essex
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
Thats clear then ... Now i'm completely confused... I take the pionts of the tyre size completely onboard , its the offset's that are confusing me..added to which my scooby runs very low (avo adjust) and thats going to cause me probs... i think i need to find a large dealer who will try a few different wheel/tyre combo's to check for clearance...
Thanks anyway..
Thanks anyway..
#9
Scooby Regular
Join Date: Oct 1998
Location: Scoobysport, Basildon, UK
Posts: 4,300
Likes: 0
Received 0 Likes
on
0 Posts
Ok... offsets. The higher the number, the more inboard the wheel sits.
I like ET48 as it gives a weight to the steering that is lacking in the standard set up. I like to be able to feel if I am at the optimum slip angles, rather than just hoping because the steering wheel is telling me nothing. Most understeer is induced because people just wrench the wheel road exceeding the slip angle/wheel loading ratio.
225s on a 7". I have now done 30,000 enthusiastic miles with this set up. I have used Toyo, Bridgestone and Continental (never again). I also have a set of Michelin cups on my 18x7s (my second set) which I use for track days. They are perfect.
I did try 225/35 18 Pzeros, but like many people, each of my sidewalls split eventually leaving me stranded on the M40.
Because of the weight of the cars, an early car is best on 215 and the later car is best on 225. A 7" wheel will take either, a 215 on a 7.5" leaves the wheel edge protruding beyond the tyre.
Its not about just what will fit. Its about what make the car good to drive.
I like ET48 as it gives a weight to the steering that is lacking in the standard set up. I like to be able to feel if I am at the optimum slip angles, rather than just hoping because the steering wheel is telling me nothing. Most understeer is induced because people just wrench the wheel road exceeding the slip angle/wheel loading ratio.
225s on a 7". I have now done 30,000 enthusiastic miles with this set up. I have used Toyo, Bridgestone and Continental (never again). I also have a set of Michelin cups on my 18x7s (my second set) which I use for track days. They are perfect.
I did try 225/35 18 Pzeros, but like many people, each of my sidewalls split eventually leaving me stranded on the M40.
Because of the weight of the cars, an early car is best on 215 and the later car is best on 225. A 7" wheel will take either, a 215 on a 7.5" leaves the wheel edge protruding beyond the tyre.
Its not about just what will fit. Its about what make the car good to drive.
Thread
Thread Starter
Forum
Replies
Last Post
Scott@ScoobySpares
Full Cars Breaking For Spares
61
11 January 2021 03:08 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
38
17 July 2016 10:43 PM
Scott@ScoobySpares
Full Cars Breaking For Spares
7
14 December 2015 08:16 AM
MeisterR
Car Parts For Sale
1
15 September 2015 07:07 PM