Drums to disc offsets

Reply Subscribe

Thread Tools

Search this Thread

12-22-2011, 04:18 PM

Manic Z

Senior Member

Thread Starter

iTrader: (1)

Join Date: Oct 2002

Location: Hamilton Ontario Canada

Posts: 873

Likes: 3

Received 33 Likes on 21 Posts

Car: 1985 Camaro IROC-Z

Engine: 350

Transmission: GForce T-5

Axle/Gears: 10 bolt 3.73 posi

Drums to disc offsets

Does anyone know if going from drums to disc brakes pushes your wheels out further?

Going from drums to 10.5" disc?
OR
Going from drums to PBR rear discs?

Reply Like

12-22-2011, 06:04 PM

//<86TA>\\

Supreme Member

iTrader: (14)

$//<86TA>\\'s Avatar$

Join Date: Aug 2006

Location: Central NJ

Posts: 12,652

Likes: 0

Received 46 Likes on 44 Posts

Car: 86 Trans Am, 92 Firebird

Engine: 408 sbc, 3.1L of raw power

Transmission: TKO600, T5

Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion

Re: Drums to disc offsets

Not by any major .amount if at all. The only difference is the thickness of the drum and rotor and they are all about the same

$//<86TA>\\ is offline$

Reply Like

12-23-2011, 07:04 AM

JamesC

Moderator

iTrader: (5)

Join Date: Aug 1999

Location: Lawrence, KS

Posts: 19,282

Likes: 27

Received 93 Likes on 68 Posts

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: Drums to disc offsets

As 86 mentions, there's no substantial difference. A spacer was used on 16" wheels when GM switched from aluminum to iron drums, which created a .187 size difference. The spacer, however, seems to be hit or miss and essentially unnecessary. Even some disc brake cars received them.

JamesC