Speedy Wheels Australia
Phone: 08 8340 9455
Fax: 08 8340 9466
Homepage: http://www.speedywheels.com.au
Info: Fitting a set of wheels with the correct offset is most important. Yet, because there are two commonly used (but different) methods for measuring offset, much confusion reigns.
At Speedy Wheels we understand both the "backspace method" and the "centreline method", so a short explanation of each may assist you in selecting the correct offset wheels.
Backspace Method: Measure from the inside rim edge to the high point of the bolt hub. Distance "A" in millimetres.
Centreline Method: Measure the overall width of rim (Distance “X”), halve this measurement to find centreline then measure backspace (Distance “A”).
Subtract “A” from “X/2” and you now have the centreline offset, which in Australia is written 35P or 10N to denote either positive or negative centreline offset. In Europe, centreline offset is usually written ET35 or ET10 etc.
NOTE: The centreline offset measurement is “rim width dependant”, ie. as the width of the rim changes, so does the centreline offset, eg. if you have 14 x 6 wheels with 47P offset and would like to fit 14 x 7 alloys, then the same offset in 14 x 7 is 35P. In both instances, the backspace remains at 135mm.
Contact Advertiser
Other listings from this user:
Images
Phone: 08 8340 9455
Fax: 08 8340 9466
Homepage: http://www.speedywheels.com.au
Info: Fitting a set of wheels with the correct offset is most important. Yet, because there are two commonly used (but different) methods for measuring offset, much confusion reigns.
At Speedy Wheels we understand both the "backspace method" and the "centreline method", so a short explanation of each may assist you in selecting the correct offset wheels.
Backspace Method: Measure from the inside rim edge to the high point of the bolt hub. Distance "A" in millimetres.
Centreline Method: Measure the overall width of rim (Distance “X”), halve this measurement to find centreline then measure backspace (Distance “A”).
Subtract “A” from “X/2” and you now have the centreline offset, which in Australia is written 35P or 10N to denote either positive or negative centreline offset. In Europe, centreline offset is usually written ET35 or ET10 etc.
NOTE: The centreline offset measurement is “rim width dependant”, ie. as the width of the rim changes, so does the centreline offset, eg. if you have 14 x 6 wheels with 47P offset and would like to fit 14 x 7 alloys, then the same offset in 14 x 7 is 35P. In both instances, the backspace remains at 135mm.
Contact Advertiser
Other listings from this user:
This user has been viewed 297 times.