Hello all

Keep noticing that when I brake really hard on my Land Rover MTB I get quite a vibration through the handlebars and was just wondering what it might be. It's not noticeable any other time, just right as the speed gets to about 10mph and still braking hard. Is it perhaps the tyre right on the limit of grip? These are cable discs BTW (details on link in sig.), so nothing too powerful, but I always keep them well adjusted.

Cheers