RX100, until it wore out, was good stuff. I used an RX100 front der, brakes, and brake levers at different points back in the day, and I got them somewhat by choice (I chose to save money and buy that stuff, not buy more expensive stuff - I spent my money on wheels, non-wear parts like post, saddle, bar, stem, and I tried all sorts of different rear derailleurs before I went to Ergo). In fact I think I still have my RX100 brake levers and front der somewhere.

I can tell you the hubs aren't great, but until you can't adjust the hub properly (i.e. it's loose or it's tight, but never "just right") they'll be fine too. Cranks aren't super stiff either, but, again, not really an issue. Relative to any normal crank out there they're fine.

Work on safety (tires for sure if it's been stored a while, maybe chain), fit (proper length stem, proper width bars), a couple judicious updates (a modern saddle and bar do wonders for a bike's "stance", and a lighter post may not be that expensive).

If you need some gearing adjustments, like if you need better climbing gears, you should do that too.

I'd race that bike with a couple adjustments - fit to me, right side bar end shifter, and close ratio cassette in the back. It'll be 90% of my current bike, give or take.

cdr