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How do you measure backspace??
Posted: Mon Apr 03, 2006 12:23 pm
by boggo
Now this may sound like a stupid question,but how do I measure the backspace required for new rims on my defender?? She's currently got the stock steel rims it came with,and I'm looking to put some 16x8's on and run some 35's and have been told I need to get the backspace right or they could rub.Any help would be appreciated
Posted: Mon Apr 03, 2006 12:41 pm
by HSV Rangie
back space:
the distance from the back of the wheel to the wheel mounting surface.
Michael.
Posted: Mon Apr 03, 2006 1:35 pm
by boggo
Cheers,that seems too easy.There was talk of defenders discs being off centre(?!?),sometimes by quite a bit,and of the distance varying from either side of the vehicle.So really,I would need to measure from the inside of the disc to the shock or spring mount(or chassis rail),and the outside of the disc to the wheel arch in order to calculate the backspace required??Or am I just making this harder than it needs to be?
Posted: Mon Apr 03, 2006 2:06 pm
by HSV Rangie
Std RR classic and disco 1 wheels.
16*7
have 130 mm back space.
Michael.
Posted: Wed Apr 05, 2006 5:47 pm
by Bush65
boggo wrote:Cheers,that seems too easy.There was talk of defenders discs being off centre(?!?),sometimes by quite a bit,and of the distance varying from either side of the vehicle.So really,I would need to measure from the inside of the disc to the shock or spring mount(or chassis rail),and the outside of the disc to the wheel arch in order to calculate the backspace required??Or am I just making this harder than it needs to be?
You method will not help to determine how much backspace to use to prevent larger dia tyres rubbing on the radius arms at full lock.
You need to be aware of the legalities of increasing the vehicle track. And tyres extending beyond the bodywork.
Re: How do you measure backspace??
Posted: Wed Apr 05, 2006 6:47 pm
by mattD110td5x
boggo wrote:Now this may sound like a stupid question,but how do I measure the backspace required for new rims on my defender?? She's currently got the stock steel rims it came with,and I'm looking to put some 16x8's on and run some 35's and have been told I need to get the backspace right or they could rub.Any help would be appreciated
There is quite a bit of infromation on the D90 site about 35"
http://www.d-90.com/forum/index.php?
Also have a look at a diagram on backspace
here
While we are talking about legals... The D130 does have lower
backspace rims to give a turning circle like a ferry as opposed to a
tanker. As I suppose it is a defender
so you could argue that it
is OK to at least go as far as the D130 backspace, I don't know if
that is far enough for what you are planning.
ttfn,
Matthew