I just posted a model of the Skyway 9x2 pneumatic wheel (p/n SPEC92P) in the mechanical library if your interested.
THANKS ED
can you also do the 8 x 1 pneumatic caster wheels?
It would greatly help out for my designs
Thanks AGAIN
Gabe Goldman
Team 384
I’m not aware of a 8" x 1" Pneumatic wheel.
I’ve posted the 8" x 1" standard molded FIRST KIT wheel as well as the 6" x 1" version. If the 8" x 1" pneumatic wheel exists, I don’t have one in my hands to dimension.
Sorry.

Looks like there may be such a wheel after all. Is it part number WHL883 ?
Im going to be a jerk and ask if you can model the 9x3, even if you just stretch the 9x2
but hey, beauty of requests is you can say no! 
Keep up the good work Mr Sparks my teams design would be in even worse shape than it is now if it wasnt for you.
Hey ED, we have 8 1/2" pneumatic wheels. We just used the 9" wheels and turned them down 1/2". Simple.
Nick237 
OK Jordan,
Just for you …
And Please … Call me Ed … Mr. Sparks creeps me out (I don’t want to be old and respected just yet) 
BTW: This model is an educated guess. If anyone has this part, please verify some dimensions for me especially the length of the keyed aluminum tube through the center of the hub.
Nick,
I’m inspired by your resourcefullness. You are my mentor …

Our order from skyway hasnt come in yet, but when they do I will let you know how your model shapes up.
Thanks again Mr. Sparks err I mean Mr. Ed Sparks err I mean Mr Ed 