I have the Loaded Vanguard with 78a 70mm wheels on it.There rounder wheels, Ive seen alot of vanguards with like flatish wheels, so just so you know, there round.
Can you do slides with that size wheels?
I want to start learning how to slide but know nothing about it/ and ive heard that with some size wheels you cant do slides..
And do you need gloves to slide?
you can slide those wheels, rounded lip wheels slide better then square lip wheels (what you seem to call flat wheels....) you can do stand up slides withought gloves, but if you want to do colemans and other types of slides make a set of gloves with poly carb cutting board and a set of work gloves ( either melt or glue the chopped pieces of board onto the glove)