Originally Posted by
Kimmo
Colour me highly dubious.
A, I ran my bike for a couple of months once with no grease in hubs, BB or headset with no detectable damage.
2, even Shimano's infamous STI grease, even after ten years, would still serve to lube a cup and cone bearing. If it's enough to prevent corrosion, it's enough to lube the bearing enough to prevent damage.
I'd just make sure everything's goldilocks, and put air in the tyres, unless it's the sort of bike that warranted full TLC.
I don't know what hubs the OP has but several years ago I bought an '86 Bridgestone 400 that had sat unused for about 12 years. The hubs (Sansin) and bottom bracket (SR) looked like they were packed with dry rubber cement when I took them apart. Maybe they would have survived some use in this condition but I was certainly not willing to find out. YMMV.