Motorcycle solid rear wheel vs brake plate-like disk.....

[Hans Blom]

I was wondering about the legality of basically a large disk on either side of your rear wheel in a modified or special construction motorcycle.  If a rear disk wheel is permitted, could you have basically like the roadster guys have , meaning a flat disk that covers the inside of the wheel up to the outside or the rim? This would be in a non-streamlined class as in M-PG or A-PG. While actually theoretically substantively, it's not the wheel, could you have plates on each side if they where only the diameter of the wheel?

Hans

[landracing]

I dont have the rule book in front of me... But I remember reading that a solid rear wheel is ok, NO wheel disks permitted at all..

Jon

[Hans Blom]

my point exactly, it is neither a solid wheel, nor a wheel disk.  A solid wheel is self explanatory, and wheel disk, I assume is a disk attached to the rim like your typical moon disk.  This would be a disk attached to the axle covering the wheel area, but not touching, nor rotating with the wheel.

[Glen]

The rule book states NO WHEEL DISCS ALLOWED

[landracing]

Hans,

You cannot even do as you state... Rear wheel rim has to be visible for 180 degrees rear of the axel (horizontal line thru the axel)...

So nope not be those rules you wont be able too.

Jon

[Glen]

They are also effected by cross winds and that ain't a fun ride. I have seen about 5 bikes go down in the past 22 years and it's ugly to see what a rider goes through. There are rules made for every reason.
Glen

[JackD]

The intent of the rule is not always equally understood.
Some of it has to do with the difference in effect if a wheel disk comes off
a car and the effect it would have in a bike.
The rest has to to with aerodynamic limitations that allow greater flexibility
to handle the various conditions the bike is expected to run in.
Theoretical designs produce theoretical results but then you have do deal
 with the real world that is not so compliant.

[Hans Blom]

I kinda figured it wouldn't be allowed since it wouldn't actually be a solid wheel it would be defined as a streamlining aid which of course is behind the axle.  It would look pretty cool though, as long as you didn't blow over.

[JackD]

Spinners would look good also.
Blowing over looks bad no matter what.
It sounds like you understand.

[Utahfab]

When the rule book says "No wheel disks" what exactly is it referring to?  Does this mean the old Moon disks that screw on the rim are no longer legal?  What are your options?

Does this mean that if you have a streamliner and want a streamlined wheel you have to have custom disk wheels made as your only option?

[1212FBGS]

you can do whatever you want in a streamliner class car or bike

[cammer113]

Crazy cracker!!

Norway/Texas???

I was wondering about the legality of basically a large disk on either side of your rear wheel in a modified or special construction motorcycle.  If a rear disk wheel is permitted, could you have basically like the roadster guys have , meaning a flat disk that covers the inside of the wheel up to the outside or the rim? This would be in a non-streamlined class as in M-PG or A-PG. While actually theoretically substantively, it's not the wheel, could you have plates on each side if they where only the diameter of the wheel?

Hans

[bbb]

so I have always tried to understand this rule. can someone do some rough numbers for me?

assuming I use a 17" solid wheel on my hayabusa. x 2 wheels. how many square" does this equal? I already know the answer. that would equal a cross sectional view to wind of X.

now... take my 6' tall, 62" shoulders, 56" chest, 21" arms, 44" waist, 34" thighs and 20" calves (which equals more than 300lbs) what is my cross sectional view to a cross wind?
how are these two numbers so different with one being illegal and one being perfectly legal (in most states!!) and one of the rules makers makes me physically look like dolan. well, except that big ol' scar on his flank!

[tortoise]

assuming I use a 17" solid wheel on my hayabusa. x 2 wheels. how many square" does this equal? I already know the answer. that would equal a cross sectional view to wind of X.

now... take my 6' tall, 62" shoulders, 56" chest, 21" arms, 44" waist, 34" thighs and 20" calves (which equals more than 300lbs) what is my cross sectional view to a cross wind?
how are these two numbers so different with one being illegal and one being perfectly legal (in most states!!) and one of the rules makers makes me physically look like dolan. well, except that big ol' scar on his flank!

First off, "solid" wheels are only illegal on the front. Second, when you steer a front wheel, it creates a cross wind.

[bbb]

since when at speed does a wheel turn on a motorcycle while traveling in a straight line? I understand countersteering etc...