I only have about 60k on them, but it just felt a little rough to me and for $30 it makes me feel better to replace them.
Only? 30k has always been tops with me. The same with clutch cables. Clutch when it tells me so.
Motor mounts 25K. Brakes when I need 'em but no more than 60K when I'll also make a decision about timing chain; When I've had the $$ I switched to gears.
Wonder why HD stopped using gears?
60k sounds reasonable, I have seen good bearings in wheels (especially front wheels) at 100k+. 30k to me is a little early, but like Lucky said for $30 or $40 bucks (which is the most it should cost if the wheel is already off), do it if it makes you feel better.
I've got about 82K on my '07 Lowrider and I'm still on original front/rear wheel bearings, clutch, drive belt, clutch cable, timing chain and motor mounts. Replaced brakes at 60K. Had the bike on the lift week before last to change eng/xmsn/primary oil, new rear tire, adjust steering head bearings inspect motor mounts and give a good going over in preparation for last week's run. I don't do burnouts or run the engine hard and change oils/adjust drive belt religiously
Maybe I'm getting old and don't feel things as good as I did 30-40 years ago but she cruised smooth as glass from 65-80 mph the entire trip. Bike also used less than one increment on the engine dipstick.
A good scooter is like a good woman, you take care of her and she'll take care of you.