simplegreen might end up making the tire too dry (cracks) as it takes away oils... so i recommend you give it some dressing afterwards. kinda like after doing dishes you may/may not need some hand lotion.
as for wheels i use my boar's hair brush and car shampoo. spray some Prima Hydro (available from phil over at detailers domain) which is a polymer based sealant as you dry product. can use it on glass, plastic, paint, seals, etc. very versatile easy to use product that actually lasts weeks.