I am not sure to answer your questions, but I have the 2005 and it holds up to 55 lbs, and I don't think this changed in 2006. I think the only change was adding a canopy. We LOVE, LOVE, LOVE our Volo for dd4. She is 31 pounds and very tall for her age, so we are hoping it last a while longer. She is using it in a week at WDW for our 3rd WDW trip and it has done wonders on several other trips to various destinations as well. We just bought a Quest for dd 6 months and love that too, but the Volo is so simple, easy, light, breeze for dd from the mesh seat -- wonderful! I got mine on eBay for $70 w/ shipping and I'd buy another in a heartbeat if anything happens to this one.