Riders with a 3x9-speed mountain bike drivetrain (three chainrings, nine-speed cassette) who want to replace a worn or damaged pair of shifters like for like.
This is the Shimano Alivio SL-M3100 shift lever set for 3x9-speed mountain bike drivetrains. The left lever, SL-M3100-L, shifts a front triple chainring, and the right lever, SL-M3100-R, looks after the nine rear gears.
Both levers are RAPIDFIRE PLUS with an optical gear display, so you can see your front and rear gear at a glance, and the right lever can move up to three gears in one stroke. They mount with their own clamp band (clamp band type only), have a shift cable adjuster, and Shimano lists the rear lever for MTB 9-speed rear derailleurs.
Made for a front triple
The left lever has 3 front speeds and light, responsive shifting across the three chainrings.
Three gears in one stroke
The right RAPIDFIRE PLUS lever can move up to three gears at a time, which suits quick shifting.
Optical gear display on both levers
Each lever shows the selected gear at a glance.
Clamp band mount
Clamp band type only, with a shift cable adjuster on both levers.
Set
Levers
RAPIDFIRE PLUS
Shimano's trigger shifter for quick shifting. The right lever can move up to three gears in one stroke.
OPTICAL GEAR DISPLAY
Shows which gear position is selected while you ride, including how many gears you can still select on the low side or the top side. Both levers in this set have it.
Great for
Maybe not for
One size, clamped to the handlebar with a band. Match your rear derailleur (MTB 9-speed) and your front derailleur (3-speed) to the set.
Count your chainrings first
This 3x9 set has a 3-speed left lever, so it is for a bike with three chainrings up front. A bike with two chainrings needs the 2-speed left lever from the 2x9 set instead. Shimano recommends OT-SP41 outer casing for these levers, so it is worth replacing worn casing when you fit new shifters and cables.
