Keeping in mind I know nothing. When I had some stuff put on the bike recently the BMW mechanic gave me a heads up that I had about 2-3 mm left on rear passenger and should change them in the next 1500 miles. I'm thinking about doing a 800 mile ride this weekend and having the rear pads replaced upon my return. Is this too risky and cutting it close or do you think based on the mechanics statement alone I should be ok? Thanks.