Front Wheel Offset With 20's
dssur
+1y
oh, and adding 4wd sheetemtal will give you about a 3/4 inch backspace cushion.
SO if you needed +39 on a 7.5 (I know this fits, I had it on a previous truck)
7.5 + 1 = 8.5
8.5 / 2 = 4.25
39mm / 25.4 = 1.54
4.25 + 1.54 = 5.79 or roughly 5.75 backspace
having 4wd sheetmetal will give you .75, so you need 5 inches of backspace to tuck a 7.5 wide wheel.
7.5 + 1 = 8.5
8.5 / 2 = 4.25
5 - 4.25 = .75
.75 * 25.4 = 19.04 or roughly 20mm offset for a 7.5 wide wheel.
To use this number to figure up what you would need on another width wheel, find the FRONT SPACE for the wheel you know fits. This frontspace CANT change and still tuck no matter the width. To find frontspace, you subtract the backspace from the total width.
7.5 + 1 = 8.5
8.5 - 5 = 3.5 fronspace
For an 8.5, you would need
8.5 + 1 = 9.5
9.5 - the frontspace you know fits 3.5 = 6 inches of backspace.
now figure out offset
9.5 / 2 = 4.75
6 - 4.75 is 1.25
we already know that 1.25 * 25.4 = 32mm offset.
So, knowing that a +39 7.5wide wheel fits with 2wd sheetmetal, we figured out what offset we needed to fit a7.5 inch wide wheel (20mm) and an 8.5 wide wheel (32mm)with 4wd sheetmetal.
SO if you needed +39 on a 7.5 (I know this fits, I had it on a previous truck)
7.5 + 1 = 8.5
8.5 / 2 = 4.25
39mm / 25.4 = 1.54
4.25 + 1.54 = 5.79 or roughly 5.75 backspace
having 4wd sheetmetal will give you .75, so you need 5 inches of backspace to tuck a 7.5 wide wheel.
7.5 + 1 = 8.5
8.5 / 2 = 4.25
5 - 4.25 = .75
.75 * 25.4 = 19.04 or roughly 20mm offset for a 7.5 wide wheel.
To use this number to figure up what you would need on another width wheel, find the FRONT SPACE for the wheel you know fits. This frontspace CANT change and still tuck no matter the width. To find frontspace, you subtract the backspace from the total width.
7.5 + 1 = 8.5
8.5 - 5 = 3.5 fronspace
For an 8.5, you would need
8.5 + 1 = 9.5
9.5 - the frontspace you know fits 3.5 = 6 inches of backspace.
now figure out offset
9.5 / 2 = 4.75
6 - 4.75 is 1.25
we already know that 1.25 * 25.4 = 32mm offset.
So, knowing that a +39 7.5wide wheel fits with 2wd sheetmetal, we figured out what offset we needed to fit a7.5 inch wide wheel (20mm) and an 8.5 wide wheel (32mm)with 4wd sheetmetal.
M
maz2low
+1y
Originally posted by Russ-D
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
maddawg
+1y
hey maz2low, how the hell did keep that upper ball joint from binding without changing the angle of the plate...any special brand that has more travel than oem joints?
even with drop spindles mine baaaaaaarly made it.
by the way did you ever read my post right after your first post?
and please don't think i'm jabbin' at you.
your truck is (and has always been) one of my very few favorites.
even with drop spindles mine baaaaaaarly made it.
by the way did you ever read my post right after your first post?
and please don't think i'm jabbin' at you.
your truck is (and has always been) one of my very few favorites.
flameds10(tyler)
+1y
Edited: 6/3/2006 2:30:09 PM by FlamedS10
ok, maybe they are +40, sorry for the mistake, i just remember being told they were 42 when i bought them, but regardless. This is my set up front
20x8.5 with 225/30/20 +40 offset, aim drop spindles, upper arms we senctioned 1/4 and a 1/4 shim in the back mounting. also using 4x4 fenders. and they tuck, truck is bd 2 inches and lays pinch.
ok, maybe they are +40, sorry for the mistake, i just remember being told they were 42 when i bought them, but regardless. This is my set up front
20x8.5 with 225/30/20 +40 offset, aim drop spindles, upper arms we senctioned 1/4 and a 1/4 shim in the back mounting. also using 4x4 fenders. and they tuck, truck is bd 2 inches and lays pinch.
dssur
+1y
Originally posted by Maz2low
Originally posted by Russ-D
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
no jabs, I missed that in your reply. Tucking in the front is way different than tucking in the back, I remember Lee Farmers Mazda back in 2001 at Slamboree tucking some +20 17x8 Boyd in the front.
He was using LUG NUTS as camber shims. For the rear he had a courier rearend.
SO if someone asked Lee about what offset tucks on a mazda, he might say +20 on 8 wide. which would only work if you put lug nuts in as spacers.
Relax. All I was suggesting is that when someone asks about apples the replies should be about apples. I like your truck, I've got no beef with you, but your advice may not be universal.
Originally posted by Russ-D
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
no jabs, I missed that in your reply. Tucking in the front is way different than tucking in the back, I remember Lee Farmers Mazda back in 2001 at Slamboree tucking some +20 17x8 Boyd in the front.
He was using LUG NUTS as camber shims. For the rear he had a courier rearend.
SO if someone asked Lee about what offset tucks on a mazda, he might say +20 on 8 wide. which would only work if you put lug nuts in as spacers.
Relax. All I was suggesting is that when someone asks about apples the replies should be about apples. I like your truck, I've got no beef with you, but your advice may not be universal.
M
maz2low
+1y
Originally posted by maddawg
hey maz2low, how the hell did keep that upper ball joint from binding without changing the angle of the plate...any special brand that has more travel than oem joints?
even with drop spindles mine baaaaaaarly made it.by the way did you ever read my post right after your first post?
and please don't think i'm jabbin' at you.your truck is (and has always been) one of my very few favorites.
I Re-Angled the Ball Joints barely . I then sent the Stock Control Arms to KustomWorks for him to copy . Control Arms were never Shortened 3/4" like you asked .
hey maz2low, how the hell did keep that upper ball joint from binding without changing the angle of the plate...any special brand that has more travel than oem joints?
even with drop spindles mine baaaaaaarly made it.by the way did you ever read my post right after your first post?
and please don't think i'm jabbin' at you.your truck is (and has always been) one of my very few favorites.
I Re-Angled the Ball Joints barely . I then sent the Stock Control Arms to KustomWorks for him to copy . Control Arms were never Shortened 3/4" like you asked .
M
maz2low
+1y
Originally posted by Russ-D
Originally posted by Maz2low
Originally posted by Russ-D
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
no jabs, I missed that in your reply. Tucking in the front is way different than tucking in the back, I remember Lee Farmers Mazda back in 2001 at Slamboree tucking some +20 17x8 Boyd in the front.
He was using LUG NUTS as camber shims. For the rear he had a courier rearend.
SO if someone asked Lee about what offset tucks on a mazda, he might say +20 on 8 wide. which would only work if you put lug nuts in as spacers.
Relax. All I was suggesting is that when someone asks about apples the replies should be about apples. I like your truck, I've got no beef with you, but your advice may not be universal.
My setup is far from Universal and did not post much for that reason . But anybody wanting to put 20s on a mazda will never get a complete Universal setup which is why i replied to show the different ways he could go . Alot of Camber or Less
Originally posted by Maz2low
Originally posted by Russ-D
Back to mazdas. No way will a +42 fit with 2wd sheetmetal unless you do as said and narrow the upper arm. It absolutely will not fit the back, ever, unless you shorten the axle or go to a courier rear. The guy who has them also neglected to mention he is running an RX7 rear end, which will camber in like the front. For 2wd sheetmetal
If you are referring to me on neglecting to say i am running a Rx-7 you better read my post because I clearly state it . I hope the rest of your post is also not a jab at me by saying i am not able to tuck my +45 20x8.5 wheels under 2wd without shortening the Upper Arms .
no jabs, I missed that in your reply. Tucking in the front is way different than tucking in the back, I remember Lee Farmers Mazda back in 2001 at Slamboree tucking some +20 17x8 Boyd in the front.
He was using LUG NUTS as camber shims. For the rear he had a courier rearend.
SO if someone asked Lee about what offset tucks on a mazda, he might say +20 on 8 wide. which would only work if you put lug nuts in as spacers.
Relax. All I was suggesting is that when someone asks about apples the replies should be about apples. I like your truck, I've got no beef with you, but your advice may not be universal.
My setup is far from Universal and did not post much for that reason . But anybody wanting to put 20s on a mazda will never get a complete Universal setup which is why i replied to show the different ways he could go . Alot of Camber or Less
maddawg
+1y
aahhh, i knew there had to bea mod in there somewhere.thanks for answering back.
the curiousity was killing me.
the curiousity was killing me.