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Chauncey 08-23-2011 12:58 PM

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I have a warped front disc on the left side on my 83 Aspy. I bought a set of used 83 front discs and the hub portion is different looking.My Aspy had a solid cast hub and the ones I bought have cast "spokes". I am gathering they are from an interstate? As far as I can tell they are the same dimensionally. Are they?

Can you turn a front disc to take out the warp like on a car/truck? Mine measure .385" (9.7 mm).

I have measured the thickness with a mic and they are similar, within reason,and thicker than the 9mm minimum.

The height from hub face to disc seems to be the same, eye balling them sitting side by side on the bench top.

Am I mising something or are they just a different Hub style and they should work fine?

BenMC 08-23-2011 04:17 PM

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I don't know about the fitting, but I can tell you that getting them turned doesn't last very long. I had my rear disc done and got less than 2000 miles before the pulse through the brake pedal came back.

Ken Bergen 08-23-2011 04:56 PM

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The actual disc on an Interstate is a nominal 5mm and a different off set than the Aspencade so your 9-10mm replacements are correct.

As far as turning the old ones goes like Ben said it probably won't last and would probably end up under minimum spec. Add to that the fact that the disc surface to webbing will have thick and thin areas and will warp easily.

Chauncey 08-23-2011 06:46 PM

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OK, Thanks. Glad the lathe at the local autoparts was broke Saturday. I would have wasted some cash. I have the disc sanded to rough it up, mounted and got the new pads tonight so back together it goes. I'm still amazed by the collective knowledge of the folks on this site.

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