Wheel sizes in ITR.

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ekim952522000

New member
Ok so I am a little confused does the underlined part override the first part in bold or do both parts apply? The way I read this is, if a car came with 16" wheels and is classified in ITR you can run 15" wheels. Is that correct or do both apply?

7. Wheels/Tires
a. Any wheel/tire may be used within the following limitations:
1. Cars originally equipped with twelve (12) inch wheels may
fit thirteen (13) inch wheels. Cars originally equipped with
metric 365 wheels may fit fourteen (14) inch wheels, and
cars originally equipped with metric 390 wheels may fit
fifteen (15) inch wheels. The above-mentioned cars as
well as those cars originally equipped with thirteen (13)
inch or fourteen (14) inch wheels may fit up to a fifteen
(15) inch wheel. Cars may not fit wheel diameters smaller
than those listed on their spec line. All other cars shall
retain the wheel diameter fitted as original equipment for
their make, model, and type. Knockoff/quickchange type
wheels are prohibited. Wheels must be made of metal.
Cars classified in ITR may utilize any wheel diameter up to
17” or retain their stock diameter wheels if larger.
Click to expand...
 
ekim952522000 said:
ok so you are allowed to downsize wheels in ITR.
Click to expand...
No. All of those rules must be taken as a whole, not just the last line.

There are two restrictions; both must be heeded. Taken together they mean you can use any wheel diameter between the stock size and 17", inclusive.

Examples:

  • your stock size is 15". You can use 15", 16", or 17"
  • your stock size is 16". You can use 16" or 17".
  • your stock size is 17". You can use 17".
  • your stock size is 18". You can use 17" or 18".
HOWEVER, I can see where one can interpret where ITR has a special set of rules; I assure you it was never intended. It's yet another example of a poorly-worded addendum to a poorly-worded addendum to a poorly-worded rule. We went through this whole schmozzle when the rule was first written, then again when it was re-written. Looks like it's time for yet another "re-writ"...

Where's the topic I started on how to write a rule...?
 
Thanks. That what I thought the intent was I just wanted to make sure. But I only new what the intent was because I remember the talks about it. If I was reading it for the first time I would have thought downsizing was perfectly ok.
 
Gesh, that is confusing how it's worded. I didn't take it to mean what you said Greg. That's gotta be changed. Speaking of which, why is this just written for ITR? Wouldn't it be better if just written as a standard rule for all IT classes. Granted I'm not aware of any other classes that came OEM with greater than 17" but even if that never happens, it would reduce the confusion along with a re-write.
 
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hmmmm......Greg on second thought reading it again it does not make any sense the second part of the rules has to override the first or it would NOT be legal for cars that came with 18" wheels to downsize to 17" wheels. So if it is legal for cars to downsize to 17" wheels from 18" it should be legal for cars to downsize to 15" from 16" right?

<----really confused now.


Just brain storming on a boring Friday how bout?

Cars classified in ITC or ITB may utilize any wheel diameter up to
15” or retain their stock diameter wheels if larger. Max wheel width in ITB & ITC is 6"

Cars classified in ITA or ITS may utilize any wheel diameter up to
16” or retain their stock diameter wheels if larger. Max wheel width in ITA & ITS is 7"

Cars classified in ITR may utilize any wheel diameter up to
17” or retain their stock diameter wheels if larger. Max wheel width in ITR is 8.5"
 
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Why do we write dumb rules like this anyway? So people can get off rules nerding on these forums? Why can't the wheel rules be a little more sane such that we limit the max width per class?
 
Why does it matter if a car used a wheel diameter larger than 17"? What advantage do they gain? I don't understand why this new rule was added. I'll have to search for that thread Greg referenced.
 
Whole bunch of folks whittled on that rule and that is the best we came up with. It's not good, is it?

The thinking in the larger than 17s" was some ITR cars came with 18"s stock and we wanted to allow them to use their stock size.
 
gran racing said:
Why does it matter if a car used a wheel diameter larger than 17"? What advantage do they gain? I don't understand why this new rule was added. I'll have to search for that thread Greg referenced.
Click to expand...

Because if the larger wheel is disallowed, we have issues. Somebody now has to buy wheels when they could have raced on their stock rims, and...more importantly, and we decree that 17" is the largest allowable size, and the Futruristic Wombat comes with 19's, we might eliminate that car entirely because it's brakes may not fit within a 17" wheel. So it's a bit of future proofing as well.
 
Because the rule says you can.

Cars classified in ITR may utilize any wheel diameter up to
17” or retain their stock diameter wheels if larger.

So, your ITR car came with 16"...you can go 17, or 16 or 15....ANY diameter up to 17.

your ITR car came with 18, well, your ITR car can use any diameter up to 17, or you can keep the 18s.

But, you can't run 18s if it only came with 17s.

The anomaly is a 19" stock fitment car could run 1 -17, or 19, but not 18, if logic serves me.
 
ok so Greg says if your car came with 16" wheels you can run 16's or 17's

You say if your car came with 16's you can run 15's, 16's, or 17's

so the part that says
Cars classified in ITR may utilize any wheel diameter up to
17” or retain their stock diameter wheels if larger.

Over rules this part that says
Cars may not fit wheel diameters smaller
than those listed on their spec line

Sorry just want to make sure I know for a fact because this will have a effect on my plans for next season.
 
Because if the larger wheel is disallowed, we have issues.
Click to expand...

I was saying the opposite. Why not let them run a 22" rim if that's what they want? I can kinda see not allowing cars in other classes to run a rim smaller than OEM.

Exception: Cars classified in ITR may use any wheel diameter including those listed on their spec line.
 
I certainly see the issue , but I disagree with Greg's position.

Now, I'm not the final say, that's for sure, but, you'd think that it would be organized differently to itemize the exceptions, and the ITR statement would read something like ITR cars may use their stock size wheels or any diameter up to 17"

I' DO agree with Jeff AND Greg, that's no great bit of rule writing! (Sorry to the authors!)
 
That's funny, because my spec line says 17" rims. But, my came with both 16" and 17" rims. I read it that the minimum size is what's listed on the spec line and that ITR cars can run anything between spec line size minimum and 17" maximum, unless the stock size is above 17" then the stock size is the maximum and 17" is the minimum. Pretty much the same as Greg said. What if the stock size is wider than 8.5" say stock rims are 17x8 front and 17x9 rear?

James
 
Z3_GoCar said:
That's funny, because my spec line says 17" rims. But, my came with both 16" and 17" rims. I read it that the minimum size is what's listed on the spec line and that ITR cars can run anything between spec line size minimum and 17" maximum, unless the stock size is above 17" then the stock size is the maximum and 17" is the minimum. Pretty much the same as Greg said. What if the stock size is wider than 8.5" say stock rims are 17x8 front and 17x9 rear?

James
Click to expand...

8.5 is max, any way you'd probably develop a push with wider rears not to mention the extra money for different sizes.
 
Oh, gawd, here we go again...

Jake, if you're correct, and:
lateapex911 said:
...[an ITR car can use] ANY diameter up to 17.
Click to expand...
Then that is DIRECTLY contrary to the whole point of the rule, the same issue we discussed last year and "you guys" corrected. As you may recall, the rule back then said "up to 15" and people whose car came with 14, for example, wanted to use 13". Y'all said "no way and the rule was re-written so they could not.

Now you're telling us that ITR has special dispensation to be able to EXACTLY what other classes wanted to do and the ITAC/CRB clearly and actively prohibited???

And we're sitting here on another thread spending PAGES trying to debate a ruleset that's transparent and consistent??

This place is a mess.
 
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