What about the front wheel?

I understand that if you bought the T-78 cs (which I did as they recommend that model for beginners), you are probably going to want to replace the 7 inch hard rubber tires with the 8.5 inch inflatibles at some time. I am wearing the 7 inch tires out. Although I have rotated the tires and so bought more time with those wheels, I will have to replace them within the next few months (at a cost of a little less than $50 for the inflatibles). I now wonder about the front tire. I e-mailed Trikke tonight and posed the question as I found the pair of inflatibles on their web site, but didn't see a single wheel for replacing the front tire. They recommended keeping a spare tube (and I see they sell plastic paddles for helping to change the tube) but I can't be the only one who has ever been concerned about wearing out the front tire. It's a testament to my use of the Trikke that I am wearing out tires! I'll see what Trikke has to say.