explain this one to me....
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
explain this one to me....
http://www.cragarwheel.com/images/me...5EE1847D2B.pdf
On these rims above how can they be a 7 inch rim with a 4 inch backspacing with 0 offset. My maths tells me half of 7 is 3.5?
On these rims above how can they be a 7 inch rim with a 4 inch backspacing with 0 offset. My maths tells me half of 7 is 3.5?
Race Director
Joined: Jan 2007
Posts: 14,948
Likes: 3,351
From: NYC NY
A wheel that is 7" wide is actually 8" wide. What? The width of the wheel is measured from where the bead of the tire sits. The wheel lip is about 1/2" thick. So a 7" wheel with 0 offset has a 4" backspace. The middle of 7" is 3 1/2" plus 1/2" gives the 4" backspace. That's why when it comes to wheels it's always easier to use the backspace spec rather than offset. I hope that helps.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
A wheel that is 7" wide is actually 8" wide. What? The width of the wheel is measured from where the bead of the tire sits. The wheel lip is about 1/2" thick. So a 7" wheel with 0 offset has a 4" backspace. The middle of 7" is 3 1/2" plus 1/2" gives the 4" backspace. That's why when it comes to wheels it's always easier to use the backspace spec rather than offset. I hope that helps.
Seems like it would be easier to just measure lip to lip
