Mantamad
New Member
ET refers to the wheel off-set measured from the centre line - depending on the original spec ET, it will dictate how much further a wheel sticks out or is reset into the wheel arch if it differs from the original figure - if that makes sense 
This chart might explain it better
This chart might explain it better
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Swedespeed Forums - Wheel Offset Tutorial
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from the above link:
" The offset of a wheel is the difference between the wheel's centerline or plane and its mounting plane. Offset is the same as ET (a German abbrev.)
That mounting plane is sometimes defined using backspacing, which can be equated to ET.
Backspacing – (wheel width รท 2) = offset
FWD and AWD cars use a positive ET, the ET number is mm, millimeters
The R has a factory ET46 whereas other modern Volvos are 35 or 38.
A smaller ET moves the wheels outboard with the following effects:
- wider track (unless you use a narrow tire)
- altered suspension and steering geometry
- chance for inner fender rub
- increased caliper clearance
If you are using a narrower rim and/or tire, this may be a good thing
A larger ET moves the wheels inboard with the following effects:
- less track (unless you use a wide tire)
- altered suspension and steering geometry
- chance for inner wheel well rub
- less caliper clearance (unless wheel spokes give more)
Not many times to use a larger ET on an R
Adding a wheel spacer to an existing wheel has the same effect as a wheel with a smaller ET. "
~~~~~~~~~~~
~~~~~~~
from the above link:
" The offset of a wheel is the difference between the wheel's centerline or plane and its mounting plane. Offset is the same as ET (a German abbrev.)
That mounting plane is sometimes defined using backspacing, which can be equated to ET.
Backspacing – (wheel width รท 2) = offset
FWD and AWD cars use a positive ET, the ET number is mm, millimeters
The R has a factory ET46 whereas other modern Volvos are 35 or 38.
A smaller ET moves the wheels outboard with the following effects:
- wider track (unless you use a narrow tire)
- altered suspension and steering geometry
- chance for inner fender rub
- increased caliper clearance
If you are using a narrower rim and/or tire, this may be a good thing
A larger ET moves the wheels inboard with the following effects:
- less track (unless you use a wide tire)
- altered suspension and steering geometry
- chance for inner wheel well rub
- less caliper clearance (unless wheel spokes give more)
Not many times to use a larger ET on an R
Adding a wheel spacer to an existing wheel has the same effect as a wheel with a smaller ET. "
~~~~~~~~~~~
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Singvogel
Well-Known Member
Thanks for clearing that up, guys.
A couple of other things.
Am I right in thinking that the Freelander 1 was fitted with bigger front brakes for Model Year 2001 - when the V6 and the TD4 were introduced?
Was that why the wheels were modified? Which means that wheels for later models (2001 on) will fit all ages of Freelander, but earlier wheels (up to 2001) will only fit the earlier models?
Presumably some vehicles built in late 2000 would be model year 2001?
Hope I'm right.
S.
A couple of other things.
Am I right in thinking that the Freelander 1 was fitted with bigger front brakes for Model Year 2001 - when the V6 and the TD4 were introduced?
Was that why the wheels were modified? Which means that wheels for later models (2001 on) will fit all ages of Freelander, but earlier wheels (up to 2001) will only fit the earlier models?
Presumably some vehicles built in late 2000 would be model year 2001?
Hope I'm right.
S.
Freelaner
Landy Driver
Disks are dimensionally same apart from thickness, the vented are 6.8mm thicker.
Apparently they can be a direct replacement for solid disks without any mods, on earlier FLs!
On post 2001 the calipers were bigger though and this caused fouling so LR dished the internal wheel diameter to suit.
5mm spacers allow early alloys to be fitted to later models, although the rears may still catch a little
Apparently they can be a direct replacement for solid disks without any mods, on earlier FLs!
On post 2001 the calipers were bigger though and this caused fouling so LR dished the internal wheel diameter to suit.
5mm spacers allow early alloys to be fitted to later models, although the rears may still catch a little
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teddywood1
Well-Known Member
best explenation I have seen yetET refers to the wheel off-set measured from the centre line - depending on the original spec ET, it will dictate how much further a wheel sticks out or is reset into the wheel arch if it differs from the original figure - if that makes sense
This chart might explain it better
Singvogel
Well-Known Member
Thanks for all the wonderful info.
That's explained a lot.
Two last questions (I hope the last)
Can anyone give me the long code which starts RRC on the inside of a 6J 16" 5 spoke Freedom alloy from 2001 on - the later type of wheel to fit the vented disc and the bigger caliper?
I also need the other number complete which would start 6J-16------and probably finish with 46
That should fix it once and for all.
Thanks again.
Singvogel.
That's explained a lot.
Two last questions (I hope the last)
Can anyone give me the long code which starts RRC on the inside of a 6J 16" 5 spoke Freedom alloy from 2001 on - the later type of wheel to fit the vented disc and the bigger caliper?
I also need the other number complete which would start 6J-16------and probably finish with 46
That should fix it once and for all.
Thanks again.
Singvogel.
Freelaner
Landy Driver
Singvogel
Well-Known Member
Thanks for that Freelaner - but that guy's research was into 17" wheels.
I still need the RRC number for the 16" 5-spoke alloy.
