CMC 17" Wheel Weight & Welded Spacers

[DAlgozine]

Any mod to the wheel compromises safety IMO, I don’t understand the point of it being permanently attached, potential safety issue with no upside that I can see. If someone was protested you would audit the same way in impound, pull the wheel, dismount tire, weigh with with spacer as it came off the track.

So in this scenario, a Ford can run a 16lb wheel with a 2lb spacer and get to the 18lb minimum. Great
However, there are no off the shelf, other than custom $$ GM 17 x 9.5 wheels that weigh any where close to 16 lbs or 18lbs with the proper spacer, Or 18lb that have the proper offset. They don't exist. Closest a GM car gets its about 21lbs with a needed spacer.

[Supercharged111]

Rotating mass isn't a linear factor. It's exponential, and the farther out the weight is the much bigger of an impact it will have. I could google the equation, but it's out there and it's pretty simple.

[mach1]

So in this scenario, a Ford can run a 16lb wheel with a 2lb spacer and get to the 18lb minimum. Great
However, there are no off the shelf, other than custom $$ GM 17 x 9.5 wheels that weigh any where close to 16 lbs or 18lbs with the proper spacer, Or 18lb that have the proper offset. They don't exist. Closest a GM car gets its about 21lbs with a needed spacer.

Right, same as today, ford can run a 16lb with a 2lb spacer and perhaps sacrifice the integrity of the wheel. I would hate to see a wheel fail and take out 5 cars going into T1 just because you have to compromise safety to make it legal.

[Pranav]

I'm going to drill holes in my z06 wheels to make it an 18lb wheel.

Since the cheater mustangs are getting center of mass close to the hub, I'm going to drill into the wheel barrels.

[mach1]

I'm going to drill holes in my z06 wheels to make it an 18lb wheel.

Since the cheater mustangs are getting center of mass close to the hub, I'm going to drill into the wheel barrels.

Drill em and dab some rtv in the holes, Chevy P1!

[Pranav]

Drill em and dab some rtv in the holes, Chevy P1!

I once RTVed a valve stem on my Honda and did a few 1/4 mile passes on it then drove home.

It actually failed but because it was an Azeni RT-615, I never noticed. Sidewalls of steel...

[DAlgozine]

Right, same as today, ford can run a 16lb with a 2lb spacer and perhaps sacrifice the integrity of the wheel. I would hate to see a wheel fail and take out 5 cars going into T1 just because you have to compromise safety to make it legal.

Or stick to the original intent of the 18lb wheel rule and don't allow 16lb wheels. All off the shelf wheels require spacers. Including the spacer with the wheel is a goofy loop hole. And I always thought goofy loop holes don't have a place in CMC.
I supposed by welding the spacer it is a custom wheel, which by rule is not illegal.

[mach1]

Or stick to the original intent of the 18lb wheel rule and don't allow 16lb wheels. All off the shelf wheels require spacers. Including the spacer with the wheel is a goofy loop hole. And I always thought goofy loop holes don't have a place in CMC.
I supposed by welding the spacer it is a custom wheel, which by rule is not illegal.

So the fords have no 18lb options?

[marshall_mosty]

I supposed by welding the spacer it is a custom wheel, which by rule is not illegal.

Doug,
The original intent of the steel spacer, attached to the wheel with plug welded screws was to create a pseudo custom wheel that met the letter of the rule.