If you want to be able to use on different grounds.. sand, road, etc not just sidewalks I would say get the tires that you add air.
I have the dogger -- but they are really hard to find. I have sold a few but the company does not drop ship anymore.
If I was buying right now I would get the no zip ..get the best you can afford confortably
__________________ Shinja mom to  Remy  lil Sis to   Bailey and Sammy  |