Check for clearance difficulties when installing aftermarket or custom wheels before proceeding with the installation
Incorrect fitment or rubbing will cause your tires and bearings to wear out early, as well as other suspension components to fail or wear sooner than they should
Offset is the distance in millimeters between the centerline of the wheel and the mounting face of the wheel. When it comes to wheel styles that are flush or convex, offsets are more often than not positive (+). Concave style and the use of spacers are common characteristics of negative (-) offsets.
Positive Offset
It is possible to have a positive offset when the hub mounting surface is located on the street side (the side that you can see) of the rim's center line. This type of offset will be seen on the majority of factory rims.
Negative Offset
If the hub mounting surface is on the brake side of the centerline of the rim, it is considered a negative offset or "deep dish".
WARNING: Incorrect offset can seriously affect vehicle performance!
Rim Measurements
Positive Offset
Negative Offset
Example:
This stock 4.5" x 10" Mini Cooper S alloy wheel has a POSITIVE Offset of 35mm. It would be seen as 4.5" x 10" wheel, 4 x 4" lug pattern, Offset of ET35.
This Minilite 6" x 10" Mini Cooper S wheel has a POSITIVE Offset of 15mm. It would be seen as 6" x 10" wheel, 4 x 4" lug pattern, Offset of ET15.
This Super Trax 7" x 13" Mini Cooper S wheel has a POSITIVE Offset of 7mm. It would be seen as 7" x 13" wheel, 4 x 4" lug pattern, Offset of ET07.
This Alleycat 7" x 13" Mini Cooper S wheel has a NEGATIVE Offset of 7mm. It would be seen as 7" x 13" wheel, 4 x 4" lug pattern, Offset of ET-7.
a wheel with NEGATIVE (-) 15mm OFFSET or ET would be shown as ET-15 a wheel with POSITIVE (+) 7mm OFFSET or ET would be shown as ET07
Basic rule of thumb: - Higher offset (ET50 for example), wheels sit closer to the car, have a chance of hitting brake and suspension components - Lower offset (ET10 for example), wheels sit further out from the car, lots of room for components but may poke past fender or impact fender on dips and bumps
It is really necessary to check whether tire or wheels are of proper offset and shape. If there is little bit variation in shape and size then it hardly matter you can go for it, but if variation is wider then it may be harmful for other parts of car. It will be best if you can identify standard shape and size otherwise buy it from any trustworthy seller like http://wheels.net/wheels/mini-rim.html that have entire knowledge and can suggest which would be best suitable rim & tire according to your car.
From:
Fakhrin
Date:
07/27/2011 @ 2:47 AM
Comment:
Thanks for the info.
From:
colinsk
Date:
02/01/2011 @ 9:06 AM
Comment:
Offset also changes your suspension geometry. Many calculations are based by using the center of the contact patch. Be careful you understand the implications of moving it if you change it.
From:
Jukka Selenius
Date:
02/01/2011 @ 1:50 AM
Comment:
Hello The Rose Petal Wheels weigh just some 2,8 kilos. What is the differece in weig to normala Minilite type 4,5,x10 racing wheel?
Is it true that they would be FIA approved for pre -65 Cooper S racers?
In some parts FIA lets some 1-2 % variation in sizes and if ahomologation tells to use 3,5" wheels then one can race with 4" wheels as in Austin Healey Sprite. FIA Historic comission changed the AH Sprite 5" wheels to 3,5" saying that thy had made a mistake 45 years ago. O´boy how they are wise , they find out queer things and claim their truth to be the right one. After this I sold my AH racer from Finland to Denmarka. Now , askin about the 4,75x10" wheels if they really are FIA approved also for pre 66 historic classes [email protected] Please email me.
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![4.5"x10" Wheel Diamond Cut in Anthracite | Classic Mini](/imagesMaster/mm-loader-snake.gif "4.5"x10" Wheel Diamond Cut in Anthracite | Classic Mini")
