A 9-speed drivetrain is compatible with an XT rear derailleur. Make sure the derailleur is designed for a 9-speed system to ensure smooth shifting and optimal performance.
Depends on their actuation ratio. Shimano 10-speed MTB line is rumored not to match up to 9-speed shifters. Shimano 10-speed road derailers are supposed to work with 9-speed systems.
it's a black market item that increases your horses skill;Stamina: +9Speed: +9Dressage: +9Galloping: +9Trotting: +9Jumping: +9However, you cannot buy it with passes; you can only use one if you already have one in your inventory. They can be obtained through the Item Exchange, by gift, or as a reward for some objectives.