What does ABG feature mean?
ABG feature is very important improvement/reinforcement to Novatec cassette bodies, providing great protection against damage caused by cassette. Hubs listed in catalogues having this feature are marked with symbol below :
ABG stands for Anti Bite Guard and in fact it is a piece of steel spline fitted on the cassette body, being strong enough to significantly reduce or completely remove the problem with bitten/damaged freehubs by cassette.
Video below explains this clearly so please check it out.