Skateboarding gear tips.?

urethane is a type of plastic. the rating **A is the grade of hardness it has, 99A is indeed pretty hard, i ride some mini logos that are at 98A, and as for wheels in general, really you gotta try all diff sized till you find the right one for you. for me its 52 mm, some ppl like 50 or even 48. some like 54-58. just depends on you, as for the bigger deck, ride whats comfy to you. trucks will fit on any board unless you go into longboards, in which case, they use different sized trucks.