General Discussion Area > Corvette Related Chat
American Racing Wheels
wabco40:
--- Quote from: Matt G on April 28, 2013, 03:07:38 PM ---Is it only the back wheels that don't fit? You can get the offset rear trailing arms for your '70, so your problem may be that they fit on a vehicle with the offset trailing arms and won't fit yours (without the offset trailing arms). I've got a '70 that I will change wheels on in the future, however I don't have the offset trailing arms so I will also need to be careful in selecting future options. May not be the problem, but worth a check...
--- End quote ---
The problem is mainly the spoke of the rim hitting the caliper. If the rim has straight spokes at the rear this will hit the caliper. If the spokes are curved at the rear they clear.
As Craig said the standard backspace on a 8" wide rim is 4". Offset trailing arms are not required with this size rim.
70vette:
Thanks again for the responses guys.
I tried a VN105 rim with curved spokes (Eagle Beak Shape) on the rear with a 4.25" back space and the spokes hit the caliper not to mention the edge of the rim hitting the hand brake bracket. Then tried a Torque Thrust 2 rim with a 4.5" back space and that also hit the the caliper. These were rims that were sent down from Queensland by the supplier and told that they would fit.
My wheel and tyre guy is so frustrated :banghead: its not funny. he now has 2 sets of American Racing rims sitting in his showroom.... If anybody is interested let me know and i will put you in contact with him. They definitely will fit other Chev cars.
There seems to be some conjecture as to how to measure the back space on a rim. I was always taught to lay a straight edge across the rim and measure to the mounting base. The supplier of the rims says to measure from the bead of the rim to the mounting base. This I feel can have as much as 1/4" variance depending on the rim and I believe that is were the problem lies.... If someone can verify this or has the correct method of measurement that would help when talking to the supplier in Queensland.
I have sent an email to American Racing to see what they suggest and am waiting for a reply. Someone must have an idea on what size fits :huh: If and when I get an answer I will post on here.
bfit:
Mate I have alway measured BS like you back of rim to mounting surface
My OEM rims range from 4" to 4.5" BS. Depending or year models
But that has nothing to do with calipers clearance
Some of the boyd Coddington wheel look similar To what your looking or , might be worth a look at
BFit
MADVET:
You are correct in the way back space is measured. A straight edge across the back of the wheel to the mounting face. The wheel width is however measured from the bead seat.
Have a close look at the points at which back spacing is measured compared to wheel width.
http://www.rimsntires.com/specs.jsp
wabco40:
--- Quote from: 70vette on April 29, 2013, 08:34:10 PM ---Thanks again for the responses guys.
I tried a VN105 rim with curved spokes (Eagle Beak Shape) on the rear with a 4.25" back space and the spokes hit the caliper not to mention the edge of the rim hitting the hand brake bracket. Then tried a Torque Thrust 2 rim with a 4.5" back space and that also hit the the caliper. These were rims that were sent down from Queensland by the supplier and told that they would fit.
My wheel and tyre guy is so frustrated :banghead: its not funny. he now has 2 sets of American Racing rims sitting in his showroom.... If anybody is interested let me know and i will put you in contact with him. They definitely will fit other Chev cars.
There seems to be some conjecture as to how to measure the back space on a rim. I was always taught to lay a straight edge across the rim and measure to the mounting base. The supplier of the rims says to measure from the bead of the rim to the mounting base. This I feel can have as much as 1/4" variance depending on the rim and I believe that is were the problem lies.... If someone can verify this or has the correct method of measurement that would help when talking to the supplier in Queensland.
I have sent an email to American Racing to see what they suggest and am waiting for a reply. Someone must have an idea on what size fits :huh: If and when I get an answer I will post on here.
--- End quote ---
Its strange that the Torque Thrust 2 rims are hitting the caliper. The backspace has nothing to do with the spokes hitting the caliper. I have heard of Torque Thrust D hitting the caliper and require a spacer to clear.
I have 15x8, 17x8 and 18x9.5 Torque Thrust 2 rims and all clear the standard calipers. This is the reason so many people use the TT2 rims on C3 Vettes
Pictures below are of 15x8 and 17x8 TT2 rims. The calipers a Wilwood D8s but are the same size as standard.
Can you post pictures of the rims and your calipers.
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