Need a quick measurement on a third gen rotor

[hoogiesngrinderz]

Need to know the distance from the hat of the rotor (where the wheel meets the rotor) to the end of the hub. I don't need the dust cap measurement.

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I don't have my car here to get the measurement. I do have 1LE rotors on the 60 Impala but I know the outer bearings are larger than the standard third gen rotor, plus the offset is different. Not sure if that would affect the the overall height off the face of the hat. Anyway, I need to measure if I have enough room to fit my wheels and center caps over the dust covers...it's going to be really close.

Thanks!

[DynoDave]

This is my '88 T/A. There's a little eyeball work here, but it looks like 2.079 - 2.080" to me.

[hoogiesngrinderz]

Just what I needed to know! Thank you!

Really wanted to avoid smashing the dust cap...looks like I might need to or up the spacer a touch in the front. Thinking it will be about 1/3" shy of fitting using your measurements. Using the 1LE rotor it would only be 1/16" shy.

[WMCCjames]

Aftermarket rotors are usually all over the board on that particular dimension. I ran into this issue on my last set of wheels. The center cap fit fine on one side of the car, on the other I had to machine down the snout a touch to make it work.

[DynoDave]

You're welcome Michael.

Now James has me wondering if my rotors are OE or aftermarket. 54k easy miles, they could still be the originals, but one would suspect in std. use that they would have been replaces by now. Don't know.

[hoogiesngrinderz]

Hmm...I know my car had two different rotors when I had them milled down into hubs for the LS1 brakes. Will have to check the car...if it ever comes back from the body shop.

I have around 1.352-1.353" of room behind the center cap. The rotor hat is 0.298" and I was planning to run a 1" spacer to clear the CTS-V brake calipers. The 1LE rotors measured 1.750 from face to the tip of the snout. My dust caps measure .900 of an inch. I really thought I had a winner with this setup...dead nuts on

After some more research, the stock 3rd gen rotor has a rotor height of ~4.32" and 1LE has a height of ~4.65". Then I read 1LE rotors increase the track width. Factor all that in with the info Dave provided, it makes sense that I would get a calculated .33" difference.

I do have 1.5" spacers on the front of my car now with a different set of wheels with 18x9's et50 offset. They sit exactly where I want them. With the new 18x9.5 et40 I need a 1" spacer to get the outside lip to sit very close to the same place.

Pretty frustrating. Not much luck finding raised center caps with a 68mm/65mm fitment that would go well with these wheels. Customs adapters would only save me 4mm over the selection of adapters I have now, plus they cost $165 - not happening.

Milling down the hubs, shaving the end of the spindle, smashing dust caps, etc, probably will not add up to a third of an inch. Might have to pull/roll the fenders and run a 275 up front. Or suck it up and run an 18x8 et40.

[WMCCjames]

I bet you can make it work. I have such an uber tight set-up on my front hubs right now. I cut off the excess threads on the end of the spindle, cut the domes off the dust caps and welded flat round plates on to give extra room. My center caps use the oring style retention into the wheel. One side is so tight that I dab a little silicon on the inside of the center cap so it glues itself to the dust cap just to make sure it doesn't come off. Crazy tight but it works and it's what i had to do to be able to run the deep concave forgings on the front.

[hoogiesngrinderz]

I wish I could cast metal...a third gen knuckle with a forth gen hub would pretty sweet right about now