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I put the Wilwood D8 calipers (designed to be "direct replacements for the '65-'82 caliper) front and rear on my '66. As others have noted, they do interfere with the factory steel wheels. I put 17" wheels on which work, but what can you use as the spare that will fit in the C2 spare tire carrier? The 17s are too wide.
Obviously my stock 15" x 5.5" is out. I sent the caliper clearance diagrams (front and rear) to Year One and they said their 15"x 6" steel rally wheels don't clear and neither do 16" x 6" rallys unless you use a spacer.
I can't speak directly to the C2, but I know the C5 and C6 guys have been using the spare from the late model GTO as its specifically designed to clear big calipers. Its probably a bit overkill for the C2, but if your primary criteria is a spare that will clear the calipers and is narrow enough to fit in the spare carrier, this might fit the bill.
I put the Wilwood D8 calipers (designed to be "direct replacements for the '65-'82 caliper) front and rear on my '66. As others have noted, they do interfere with the factory steel wheels. I put 17" wheels on which work, but what can you use as the spare that will fit in the C2 spare tire carrier? The 17s are too wide.
Obviously my stock 15" x 5.5" is out. I sent the caliper clearance diagrams (front and rear) to Year One and they said their 15"x 6" steel rally wheels don't clear and neither do 16" x 6" rallys unless you use a spacer.
Has anyone had this problem and found a solution?
Thank you!
Do you really think that you will get a 17" wheel in the tub?
I don't know, which is why I'm asking the forum, but it would seem possible that a space-saver spare might work. It should be the overall diameter of the wheel/tire combo which is significant, not the wheel diameter per se.
You don't need a 17" wheel for your spare. You just need the same diameter tire as whatever 17" tire you have. If your stock wheel and tire spare has the same total diameter as your 17" wheel and tire diameter you are good. I believe stock diameter tire is 27"
Right...the problem is that the stock steel wheels don't clear the Wilwood D8 calipers. So I need a wheel large enough to clear the caliper but that can fit a tire small enough to fit in the spare tire carrier. Practically, this means that more modern space saver tires are more likely to work since they are larger diameter wheels but are narrow.
I don't know, which is why I'm asking the forum, but it would seem possible that a space-saver spare might work. It should be the overall diameter of the wheel/tire combo which is significant, not the wheel diameter per se.
Except that,
IIRC, the tub has a curvature to it. A smaller wheel with a taller tire would typically get thinner toward the tread, especially back when these were new.
The 17" wheel may be fatter toward the outter portion of the tub, where it curves, than the original equipment making it too fat to fit properly.
OTOH, it could be just fine.
IIRC, can't get a 225/15/60 to fit well in my tub and the overall diameter is smaller than stock.
Right...the problem is that the stock steel wheels don't clear the Wilwood D8 calipers. So I need a wheel large enough to clear the caliper but that can fit a tire small enough to fit in the spare tire carrier. Practically, this means that more modern space saver tires are more likely to work since they are larger diameter wheels but are narrow.
I'm surprised the stock wheels do not fit. I have Wilwoods on my 65 and the calipers are smaller than the stock ones. I do have 17 wheels though. Do all the calipers hit the wheels or just front or rear?
I'm surprised the stock wheels do not fit. I have Wilwoods on my 65 and the calipers are smaller than the stock ones. I do have 17 wheels though. Do all the calipers hit the wheels or just front or rear?
Tom
Both the front and the rear contacted my stock 5.5" rims. Not by much, and the calipers could probably be ground down to prevent it...but frustrating that Wilwood didn't already do that.
Both the front and the rear contacted my stock 5.5" rims. Not by much, and the calipers could probably be ground down to prevent it...but frustrating that Wilwood didn't already do that.
Interesting. Yeah I would expect the correct gm disc brake wheels to clear as well.
As far as the spare some guys on here are using Chevy S10 spares. I understand the rims clear stock calipers and tire diameter is 27.1 same as stock.
Will a C4 space saver spare fit? Has anyone tried that before on the C2? It's a 17" wheel with skinny 170 series tire. Might fit better in our spare wheel tub than the GTO spare with the big five spokes that stick out? I believe I will be forced to use a space-saver design due to Vansteel's rear anti-roll bar eating into the available spare space:
I put the Wilwood D8 calipers (designed to be "direct replacements for the '65-'82 caliper) front and rear on my '66. As others have noted, they do interfere with the factory steel wheels. I put 17" wheels on which work, but what can you use as the spare that will fit in the C2 spare tire carrier? The 17s are too wide.
Obviously my stock 15" x 5.5" is out. I sent the caliper clearance diagrams (front and rear) to Year One and they said their 15"x 6" steel rally wheels don't clear and neither do 16" x 6" rallys unless you use a spacer.
Has anyone had this problem and found a solution?
Thank you!
Henry, have you actually tried an original 1967 rally, DC wheel with 3 1/2" backspacing? I only ask, because I installed the Wilwood D8 calipers on my '63 front disc conversion and have no problem with clearance with these wheels.
I bought these wheels from a friend in 1969, off of his '67 427, who was changing to Cragar SS wheels.
The GTO wheel in FLYNAVY30's post (#2) should fit in the C2 tub, it is only 26" in diameter.
This is how a reproduction 7.75-15 fits into an original, 1963 tire tub... barely! It does not drop down fully into the tub and will undoubtedly result in a 1"gap between the lid and the tub. (According to John Z the reproduction tubs are about an inch larger to compensate for the size difference between original and reproduction tires.)
This is how the GTO spare fits into the tub. Fully and if inserted with the rim protruding up (toward the gas tank) will not only allow the lid to fully close, but very likely clear Henry's sway bar.
Thank you Gusto for the helpful picture!! I don't think a '67 spare would fit with the anti-roll bar due to wheel width and/or tire bulge, but the photo of the GTO spare looks like it'll work great! Plus it's 25" diameter so it won't screw up the posi if used on the back of the car.
03-02-2017, 11:20 PM
Spare wheel/tire combo for Wilwood D8
