I see the Touring currently ships with a three speed Sunrace gear hub and a ten-cog 9-32T Sunrace cassette, and have a couple of questions:
1. What are the gear ratios on the gear hub, so I can computer the gear range?
2. Is that gear hub draggy or efficient? I intend to ride that bike in mountains so the less drag the better
3. Is that 9-32T cassette common? Once it's worn, can I easily replace it, with the same model or from eg. Shimano?

Thank you.