bolt circle question

[dbmx66]

i got a set of rims for my buddies car, but i dont know what the bolt circle is.
they are a 5 lug rim. they are a chevy pattern. wehn i measure from the center of one the holes to the center of the other hole after i skipped a hole, its comes out to be 4.5 does this mean its 5x 4.5?

[country29]

yes. on 5lug wheels measure center of 1st hole to back of 3rd hole gives you the bolt circle. all 5lug 73-87 are 5x5, those wont work. most gm cars are 5x 4.5 or 5x4.75. hope this helps.

[grinch4om]

all GM cars are 5x4.75 or 5x5

[nlped]

Originally Posted by country29

yes. on 5lug wheels measure center of 1st hole to back of 3rd hole gives you the bolt circle. all 5lug 73-87 are 5x5, those wont work. most gm cars are 5x 4.5 or 5x4.75. hope this helps.

That would only work on a four lug wheel. The "bolt circle" is measured from one side of the "circle" that runs directly through the center of all the bolt holes on the wheel, whether its 4 lug or 12 lug.

If the wheels came off of a Chevy car, they are 5x4.75" most likely. You can actually measure from the center of one bolt hole to the center of the next bolt hole and calculate the diameter of the bolt circle that way. Take that measurement, we'll call it "BC", and do this simple calculation...BC/.588, and you should get the Bolt Pattern.

Ed

[dbmx66]

they are weld draglites off of 67 nova pro street. but it didnt have the original suspension under it.

[dbmx66]

Originally Posted by country29

yes. on 5lug wheels measure center of 1st hole to back of 3rd hole gives you the bolt circle. all 5lug 73-87 are 5x5, those wont work. most gm cars are 5x 4.5 or 5x4.75. hope this helps.

these arent going onto the truck

[nlped]

I can't actually think of a gm rear drive car that ever used 5x4.5" bolt pattern. The nova would be 5x4.75". But those draglights should be dual bolt pattern (I.e. 10 hole)

[dbmx66]

Originally Posted by nlped

I can't actually think of a gm rear drive car that ever used 5x4.5" bolt pattern. The nova would be 5x4.75". But those draglights should be dual bolt pattern (I.e. 10 hole)

ones a chevy pattern, ones a ford, but i measured the center to center, do i measure from the center of one to the outside of the other? when i do that i get 4.75

[country29]

Originally Posted by nlped

That would only work on a four lug wheel. The "bolt circle" is measured from one side of the "circle" that runs directly through the center of all the bolt holes on the wheel, whether its 4 lug or 12 lug.

If the wheels came off of a Chevy car, they are 5x4.75" most likely. You can actually measure from the center of one bolt hole to the center of the next bolt hole and calculate the diameter of the bolt circle that way. Take that measurement, we'll call it "BC", and do this simple calculation...BC/.588, and you should get the Bolt Pattern.

Ed

I'm not disputing what you are saying, I do not know all nor will I, but if i take a tape measure and measure a 5 lug wheel from center of 1st to back of 3rd hole i get the bolt circle everytime. plus look in the summit catalog they tell you how to measure 4/5/6/8 lug wheels that way. just my .02

[LONGHAIR]

Words and pictures....

[dbmx66]

Originally Posted by LONGHAIR

Words and pictures....

so if the measure of the yellow line is 4.75 that means its 5x4.75

[country29]

thank you longhair, and i did misspeak on the 5x4.50 cars were 5x4.75. the mind just doesn't work like it use to! lol

[country29]

Originally Posted by dbmx66

so if the measure of the yellow line is 4.75 that means its 5x4.75

yes.

[dbmx66]

thanks you sir