Max Backspace clearance VR4

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JAP63

E III Recaro Pilot
Joined
Oct 9, 2005
Messages
2,073
Location
Gold Coast
Hey people.This could one day save a few people alot of headaches,so I
Thought id pass on some information that ive discovered that could be very usefull for anyone selecting wheels/tyre,especially if your buying unseen packages.

Contrary to the page that has been used by many of us before

http://boostin.home.mchsi.com/knowncombos.htm

I have found that a maximum of around 160mm or approx 6.3 inches of backspace is all you can fit on these cars...Thats for a 17 inch rim.
When i say this,I am talking about the rear,the front is a little more genorous,probably up around 6.7,but i havnt checked it at full steering lock.

A smaller rim would need a little more clearance,and a larger rim would be ok,itd actually have more clearance,but where only talking + or - 5 mm here at a guess.Thats because of the shape of the rear trailing arms,it curves,more clearance at the front,and less at the back.

Hope this helps,as i said,the wheel page can be a little misguiding,it says a backspace between 6.0 to 6.7.
I could never see a 6.7 fitting on the rear,not for a 17 inch rim anyway,maybe an 18.
It also holds fairly true that

- A 7" wide rim should be between 35 and 40mm of offset
- A 8" wide rim should be between 30 and 35mm of offset
- A 9" wide rim should be between 25 and 30mm of offset
But again,that depends on your rim size,eg 15,16,17 or 18 inch wheel.

Also,Visit These two sites for info

http://www.1010tires.com/WheelOffsetCalculator.asp

http://www.martincheck.com/wheel_tire_fitment_FAQ.html

The second site there is a fitment guide for 2g vehicles,and by experience of my own,theyre a little different,they can run a liitle more backspace,but as i said,the sites are only a guide,but still very usefull.

But remember..Backspace is the most crucial factor.And it can vary as you change things like camber on your wheel alignment,but only minimally.

I also found that the very top table on this page is wrong,

http://boostin.home.mchsi.com/backspacing.htm
It says a vr4 has a standard backspace of 4.77 inch,when the table below says around 5.25.
I beleive 5.25 inches to be correct,as it came up true with all my other calculations.

Hope this helps a few.
 
I also found that the very top table on this page is wrong,

http://boostin.home.mchsi.com/backspacing.htm
It says a vr4 has a standard backspace of 4.77 inch,when the table below says around 5.25.
I beleive 5.25 inches to be correct,as it came up true with all my other calculations.


Just to edit, was wrong in saying the above. The Standard VR4 backspace is 4.77 inches.


And also..dont know what i was smoking here...

I have found that a maximum of around 160mm or approx 6.3 inches of backspace is all you can fit on these cars...Thats for a 17 inch rim.

Its actually around 5.7-5.8 inches

Jamie.
 

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