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12-26-2008 #1
New to Pro-Touring
- Join Date
- Oct 2007
- Location
- central, KY
- Posts
- 50
How much room can I gain from drum to disk swap?
I would like to tuck my new 275/40/17's in, just slightly more, for perfect fitment.. How much space gain I gain going from standard rear drums on a GM 12-bolt to a Baer rear disk setup??? Thanks...
- Mark
67' RS Camaro - 468/476hp, polished, show car
68' Camaro drag car-507/752hp,-13.1:1, only 241 miles
79' TransAm- 540/763hp, Dave Monday custom built chasis,pump gas-10.2:1, LSM,CFS,Callies,AFR
80' Z/28- all original, black w/ red stripes, 2nd owner, loaded, all paperwork - excellent driver
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12-26-2008 #2
Registered User
- Join Date
- Jul 2005
- Location
- Marshall , MO
- Posts
- 699
Swapping to disks usually will add to the track width not decrease it.
Brad Shepard
69 Malibu
Marshall, MO
12-27-2008 #3
Registered User
- Join Date
- Mar 2008
- Location
- Chicago suburbs
- Posts
- 667
The drum or hat (disc) both usually sit against the axle flange, so besides the actual material thickness, there should be no change unless you narrow your rear or change wheel offset.
12-27-2008 #4
Banned
- Join Date
- Aug 2003
- Location
- Orlando, FL
- Posts
- 8,745
You will gain 1/16" of track width
12-27-2008 #5
Registered User
- Join Date
- Dec 2004
- Location
- North Jersey
- Posts
- 983
Yep, I found that out when I did a rear disc conversion on my Cherokee. The hat on the rotor was thicker than the face of the OE brake drum. I even needed to install longer wheel studs to compensate for the wider track.
Originally Posted by shep
Steve Ragusa - North Jersey
2006 Infiniti G35x
Former Build - 1988 Monte Carlo SS - ZZ4-cammed TPI 355, F-body serpentine conversion, World-Class 5-speed, Eibachs/Bilsteins, Howe tall LBJs, 34mm hollow front swaybar, 3/4" straight rear bar, 17" Coys C55s, 12" front discs, and more. Sold on 2/28/11.
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