10 x 2 1/2 rear brakes

kookie_old · April 1, 2007 at 4:52 PM

i went junk-yarding the other day and picked up

a ford airostar rear drumb 10 x 2 1/2. it fits.

why do you need diferent backing plates. it looks like

all i need to do is get the bigger shoes and the

longer hold down pins. i dont see any diference

between my stock backing plates and the airostar ones.

thanks mark

65Rangoon_old · April 1, 2007 at 5:50 PM

<font face='Comic Sans MS'>I have 2-1/2 drums on my hipo.

IIRC you will find that the 2-1/2 inch backing plates provide about 1/4 inch greater offset towards the center line of the axle housing. That combined with a similar 1/4 inch flatter drum face, provides the overall 1/2 inch of increased space required for the wider drum to index flush to the axle flange. Hope that makes sense.</font id='Comic Sans MS'>

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gjz30075 · April 2, 2007 at 4:32 AM

Right. Otherwise, you'd need a longer axle if the extra 5/8" or so is outboard.

kookie_old · April 2, 2007 at 4:05 PM

but what im saying is.. that the 2 1/2 drum fits.

it mounts flush with the axle flange (hub whatever)

and does not interfere with the backing plate;

it turns free. my old drum measured. 10x2.5 but

would only accept 10x1.3/4 shoes (thats what started this whole idea)

kookie_old · April 3, 2007 at 12:28 PM

OK now i understand, just because the drum fits

doesnt mean that the shoes will fit. the correct

backing plates actualy places the shoes 1/4" outboard.

im done now.

Participate now!