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TIRE/RIM FITMENT #803456 09/16/10 09:20 PM 09/16/10 09:20 PM
Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former... MIKES_DUSTER OP master
MIKES_DUSTER OP master Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former...	Ok guys...I know I have been DRAGGING this topic around for a few weeks but I just did some measuring tonight and want to see what you guys think. Ive been running 15"x8" rim with 4.5 back space with 5/16" spacer on the driver side and 7/16" on the pass side. Tonight I put them both on the pass side to see where the tire would sit. I now have atleast 1/2" maybe even 5/8" between the bulge of the QTP and the leaf. With the SS springs,the car sits high enough and I have plenty of room on the outside. My question is this....I want to get a 10" rim but what back space??

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803457 09/17/10 12:09 AM 09/17/10 12:09 AM
Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former... MIKES_DUSTER OP master
MIKES_DUSTER OP master Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former...	41 people look at my post and NO ONE can respond?????

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803458 09/17/10 12:18 AM 09/17/10 12:18 AM
Joined: Jul 2010 Posts: 791 Bama Randy.. super stock
Randy.. super stock Joined: Jul 2010 Posts: 791 Bama	think ARI440 has 10s on his duster but don't the BS on them.

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803459 09/17/10 12:36 AM 09/17/10 12:36 AM
Joined: Aug 2003 Posts: 43,211 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,211 Bend,OR USA	Do the math, to keep the same relations of the rim and tire sidewall to the springs and body panels requires adding half the width of the new rim width to the back spacing 4 8/16 + 5/16 +7/16 = 4 20/16 = 5 4/16 or 5 1/4, right Add one more inch for the width = 6 1/4 so the nearest off the shelf choice is probally 10x6.5 Keep the spacers handy BTW, always count on the section width being wider than you think it will when putting the same tire on a wider rim BTW, I use 10 x 5.5 x 15 and 12x 6.5x 15 on my Duster, I did have the housing narrowed down to one inch narrower than the stock 8 3/4 A bodys, I think I did keep the small A body rear brakes and the axle to brake backing plates spacing the same as the stock A body 8 3/4 are. Last edited by Cab_Burge; 09/17/10 01:10 AM.

Re: TIRE/RIM FITMENT [Re: Randy..] #803460 09/17/10 01:04 AM 09/17/10 01:04 AM
Joined: Oct 2004 Posts: 5,618 long island NY A Ari440 master
Ari440 master A Joined: Oct 2004 Posts: 5,618 long island NY	Quote: think ARI440 has 10s on his duster but don't the BS on them. 5 inch back space this is with a dana 60 I think its 53 inch long stock location caltrac setup Last edited by Ari440; 09/17/10 01:06 AM. 1.39 9.85 - 137 mph

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803461 09/17/10 08:26 AM 09/17/10 08:26 AM
Joined: Jun 2005 Posts: 793 Utah topbrent super stock
topbrent super stock Joined: Jun 2005 Posts: 793 Utah	Quote: 41 people look at my post and NO ONE can respond????? https://board.moparts.org/ubbthreads/search.php?Cat=0 http://www.google.com/custom?domains=boa...RID:1&hl=en

Re: TIRE/RIM FITMENT [Re: topbrent] #803462 09/17/10 08:38 AM 09/17/10 08:38 AM
Joined: May 2004 Posts: 855 Brisbane Australia 5 572B1 super stock
572B1 super stock 5 Joined: May 2004 Posts: 855 Brisbane Australia	Mike, I have 275/60-15 street radials on 8'' rims with 4.5'' backspace for the street and hoping to fit 15x10 rims with the same tyres on a 5 1/2'' backspace for the drags. Rob.

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803463 09/17/10 09:03 AM 09/17/10 09:03 AM
Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida rickstershemi master
rickstershemi master Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida	Quote: Ok guys...I know I have been DRAGGING this topic around for a few weeks but I just did some measuring tonight and want to see what you guys think. Ive been running 15"x8" rim with 4.5 back space with 5/16" spacer on the driver side and 7/16" on the pass side. Tonight I put them both on the pass side to see where the tire would sit. I now have atleast 1/2" maybe even 5/8" between the bulge of the QTP and the leaf. With the SS springs,the car sits high enough and I have plenty of room on the outside. My question is this....I want to get a 10" rim but what back space?? 5.25 BS is what your going to need with a 10" rim according to your measurements with both spacers Rickster

Re: TIRE/RIM FITMENT [Re: MIKES_DUSTER] #803464 09/17/10 10:13 AM 09/17/10 10:13 AM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Quote: I now have atleast 1/2" maybe even 5/8" between the bulge of the QTP and the leaf. As CAB mentioned, the section width will be wider with the wider rim, so I think you will have fit problems unless you have room on the outside and move the tire centerline that direction. I can only guess (rough) the section width will be 1" wider, so 1/2" on each side. When you said you had 1/2" clearance from the leaf spring on the passenger side, was this with no spacer? If the 1/2" clearance was using both spacers, ignore the calcs below. I can't be sure, but here is my guess: 8" rim 4.5 BS = 10" rim 5.5 BS for same tire centerline. Account for section width increase, 5.0 BS Optional increase space from leaf from 1/2" to 1", 4.5 BS But do you have room on the outside to move the tire centerline (1") this much? ie 1" centerline plus 1/2" section width will reduce outside clearance by 1.5". Also remember, if you guess wrong with too much BS (5.0"), you can space it out. But if you guess wrong with not enough (4.5"), you are stuck.

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