IMO&E you should try camping together first. Several times. Or maybe some hiking and a camping trip. That's familiar territory for her. Explore her. The biking thing should be the thing you are least interested in. When couples recreate together, the showstopper is always control issues. Give her a lot of control. We are or were solely in control of our lives. The transition to shared control is the hard part. There are 3 hard and fast rules for newbies:
1) Compromise doesn't mean giving up the things you don't care about.
2) Talk, talk, talk.
3) If you have a fight, you leave the room, you don't come back. See rules 1 and 2.
Oh - and 4) She's always right. Which is true whether you think so or not.
If you disagree with the above, best think about all this a lot longer. Don't mess with people's hearts, I guess that's a 5th rule.
__________________
Results matter