What is confirmed
The feature list ends with “2 Seated Bikes.” That is separate from the electric, dirt, and pedal line, so a category name does not tell you the bike has a passenger seat.
An official thumbnail shows two R6 avatars on one motorcycle-style bike: one at the bars, one seated behind, on the same flat grid used in the other thumbnails. That frame is evidence of passenger seating in published media. It does not show a prompt, a key, or a bike name.
Ordinary servers hold 20 players. Sharing a bike still requires both people in a session that allows it. The Weekly Global Rideout advertises 100-player event servers, which is a different cap for that window.
What to check with a friend
The official text does not explain boarding, who steers, or whether a passenger changes balance.
- Look for a bike entry that says it has two seats. Do not assume every dirt bike or every electric bike qualifies.
- Stand the passenger at the bike and watch for an interaction prompt. Use the button that prompt names.
- Read any price or unlock on that bike. None is published here.
- Ride normally before you attempt a wheelie with a passenger. No source says a second rider helps or hurts a stunt.
- If you only need to be in the same server, joining a friend and sitting on their bike are different steps. The description documents neither menu.
After the ride
If the passenger cannot sit, the usual gaps are an unlabeled bike, a missing prompt, or a full 20-player server. There is no published backup key to try. The bike guide is the place to compare categories without turning the thumbnail into a model list.