Dear Doeseberg:
The PIPE Here yet AGAIN...and I've just GOTTA say, I LOVE

those Trexler BUSHwheels!!!!
My Balsa USA Swizzle Stick 40 (in the hangar for now...

...lost it in the SUN last weekend and had only a SMALL bit of repair work to do from the crash) uses the "9-G" 3-1/2 inch size of these Trexler units (they've got a WEBSITE now at
http://www.trexlerballoonwheel.com/ AT LAST!!!)
My upcoming "Agri-Batic" CROPDUSTER conversion project, based on a Sig Four Star 60, will be using their "11-G" 4-1/2 inch size wheel-tire assemblies, along with a TnT bowed 60 size aluminum landing gear setup...and a HOMEMADE fiberglass leaf spring J-3 Cub style tailwheel assembly!
For inflation of my Trexlers, I've got one of the old DuBro "Big Wheel" piston type air pumps set up with a piece of regular silicone fuel tubing to pump them up. along with a homemade "needle" assembly made from hobby shop brass tubing (smallest diameter on THAT one is 1/16th inch OD tube, fits into that Trexler filler stem section NICELY when moistened slightly)...for DEflation, I use a piece of .015 music wire that's been ground to a ROUND tip on the end, with my Dremel, to eliminate any chance of puncturing, and GENTLY work it down into the filler hose until the air is released.
In "preserving" the tires, I've found that some tire preserative sold at auto supply stores by Meguiars-their "GOLD CLASS ENDURANCE" tire preserative product-is GREAT on Trexler tires for protection from glow fuel damage! Check at
http://www.meguiars.com/product_show...cfm?SrcLine=CW , and scroll down to the EIGHTH item there...most auto supply stores carry it...and when you open the nozzle to squirt some out onto a paper towel to coat those Trexler tires, do NOT be suprised
by a GRAPE JUICE like odor coming from the Meguiar's product...it's even purple in color, and got ME calling it
the "Great Grape" way of preserving your Trexler tires!
And have you EVER wondered if something like Trexler tires are available for FULL SIZED aircraft? Just check at
http://www.akbushwheel.com/index.html ...and be prepared to have
some HOWLS of laughter 
at how HUGE that company's BUSH WHEELS are for taildragger light planes of various makes! And they sure seem to work as NICELY as the Trexlers do for our RC models, judging from all the lightplanes with them on there at that site!
Now, a LOW WING RC CROPDUSTER with BUSHWHEELS on it...THAT is going to be something to see!
Hope these tips and links help!
Yours Sincerely,
The PIPE!