Need max offset for rear wheels with PB bracket moved?
Thread Starter
Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
Need max offset for rear wheels with PB bracket moved?
I getting ready to order a set of wheels from Ronal and need to determine max offset for the rear if I move the parking break. Does anyone have that measurement?
With the flares I'll be running 9x17 front and 10X18 rear. This will allow me to keep the tire diameter correct, gain additon width and run modern high performance tires
With the flares I'll be running 9x17 front and 10X18 rear. This will allow me to keep the tire diameter correct, gain additon width and run modern high performance tires
Racer
Joined: Mar 2003
Posts: 262
Likes: 3
From: PA
Dave,
I have 4.5" back spacing on 9.5" rear wheels and 3.75" back spacing on 8.5" wheels on my 68. I have mild flares on all four corners. I did not move the PB bracket. The spacing on the back is perfect - 1/4' clearance - and it never rubs even in hard cornering (with 17" wheels and 45 series tires). I would not go any closer without moving the bracket - and then would not add more than another 1/4" to the backspacing.
Dirk
I have 4.5" back spacing on 9.5" rear wheels and 3.75" back spacing on 8.5" wheels on my 68. I have mild flares on all four corners. I did not move the PB bracket. The spacing on the back is perfect - 1/4' clearance - and it never rubs even in hard cornering (with 17" wheels and 45 series tires). I would not go any closer without moving the bracket - and then would not add more than another 1/4" to the backspacing.
Dirk
Thread Starter
Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
You guys bring up a good point about maybe running 9.5 inch rears instead of 10 inch. Even with the stock wheels with 255/60 15 tires spaced out 1 3/4 inches is close to the outside lip of the flare.
Racer
Joined: Mar 2003
Posts: 262
Likes: 3
From: PA
Dave,
I have 275x40x17 size tires on the 9.5" wheels. The flares are only about 1" beyond the stock wheel opening. The tires in the rear are perfectly aligned with the wheel opening. Also did not have to modify the PB bracket nor use offset arms.
Dirk
I have 275x40x17 size tires on the 9.5" wheels. The flares are only about 1" beyond the stock wheel opening. The tires in the rear are perfectly aligned with the wheel opening. Also did not have to modify the PB bracket nor use offset arms.
Dirk
Thread Starter
Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
Dirk,
I was able to use a threaded spacer to give me a 1.5 inch stand off from the hub to simulate a wheel that is 1.5 inches wider than the stock 1980 aluminum wheel. This seem to work so I now know a 9.5 rim will work regarding fender clearnance.
I would still like to go with a 10 inch rim if possible however I'm real concerned about adding .5 inches of back space to the stock 4 inch back space. I crawled under neath and found that with the stock rim and 255/60 tires the tire is slightly rubbing the parking brake clip.
The .5 inch increase in back space may not be an issue at all with an 18 inch rim, but this is hard to tell even when measuring.
I do have a MIG welder I'm learning (getting much better with it) with so I could always move the parking brake cable bracket if needed.
Ronal wheels will build whatever I need and then have a concentric ring that centers the wheel on the hub center not the lugs nuts for perfect rim runout.
Dave
I was able to use a threaded spacer to give me a 1.5 inch stand off from the hub to simulate a wheel that is 1.5 inches wider than the stock 1980 aluminum wheel. This seem to work so I now know a 9.5 rim will work regarding fender clearnance.
I would still like to go with a 10 inch rim if possible however I'm real concerned about adding .5 inches of back space to the stock 4 inch back space. I crawled under neath and found that with the stock rim and 255/60 tires the tire is slightly rubbing the parking brake clip.
The .5 inch increase in back space may not be an issue at all with an 18 inch rim, but this is hard to tell even when measuring.
I do have a MIG welder I'm learning (getting much better with it) with so I could always move the parking brake cable bracket if needed.
Ronal wheels will build whatever I need and then have a concentric ring that centers the wheel on the hub center not the lugs nuts for perfect rim runout.
Dave
