Alongside Shimano’s announcement of their new Deore 12-Speed components came updates to Deore 11 and 10-Speed drivetrains. Find all the details and photos here…

Posted by Miles Arbour

Shimano’s Deore 11- and 10-speed components have seen some pretty major updates to coincide with the new Deore 12-speed drivetrain we just announced here. Most notably, the massive new 11-speed 11-51T wide range cassette and a completely redesigned 11-speed rear derailleur. Unlike Deore 12-speed, the 11-speed 11-51T cassette still uses a standard HG freehub body, which may entice those who haven’t upgraded to a new standard, like SRAM’s XD and Shimano’s Micro Spline freehubs. Don’t be surprised to see the budget-level Deore 11-speed drivetrain specced on affordable hardtail mountain bikes for 2021. Find a quick breakdown of the new 5100 and 4100 series components below. Pricing, weights, and availability should be announced in the next few weeks.

Shimano Deore 11-Speed

The new Deore 11-speed drivetrain is now offered in a wide range 1×11 setup with 11-51T cassette or a 2×11 setup with a 11-42T cassette. The new Deore 5100 series consists of a new crankset, cassette and derailleur. See a quick breakdown on each component below.

Deore FC-M5100 10/11-Speed Crankset

  • 52mm chain line
  • Options for 30, 32T chain rings
  • 10 and 11-speed systems
  • 135 and 141mm O.L.D. for QR
  • 142 and 148mm O.L.D. for thru-axle
  • FC-M5100-2/-B2 for 2×11

Deore 11-speed CS-M5100-11 Cassette

  • 52mm chain line
  • Options for 30, 32T chain rings
  • 11-51T or 11-42T
  • 135 and 141mm O.L.D. for QR
  • 142 and 148mm O.L.D. for thru-axle
  • FC-M5100-2/-B2 for 2×11
  • Shimano Deore 5100
  • Shimano Deore 5100

Deore RD-M5100 1×11 Rear Derailleur

  • 11-speed systems only
  • 51T cog maximum
  • Shimano Shadow RD+ Technology

Deore SL-M5100 11-Speed Shift Lever

  • Rapidfire Plus Shifting
  • Two Way Release
  • Optical Gear Display Option
  • I-SPEC EV or band clamp options
  • Shimano Deore 5100
  • Shimano Deore 5100

Shimano Deore 10-Speed

Although not as substantial as the new wide range Deore 11-speed, the 10-speed 4100 series has also received some updates that will likely be appealing to those looking to stick with what they know. Deore 10-speed sees a new crankset for 2×10 systems, an 11-46T cassette for 1×10 and a 11-42T cassette for both 1×10 and 2×10, as well as new 10/11-speed rear derailleurs up to 42T or 46T cogs.

Shimano Deore CS-M4100-10 Cassette

  • Standard Shimano HG freehub
  • 11-46T for 1×10
  • 11-42T Rhythm Step for 1×10 or 2×10

RD-M4120 10/11-Speed Rear Derailleur

  • Both 10 and 11-speed systems
  • Shimano Shadow Technology
  • 42T max cog size

SL-M4100 10-Speed Shift Lever

  • Rapidfire Plus Shifting
  • Two Way Release
  • Optical Gear Display Option
  • I-SPEC EV or band clamp options
  • Shimano Deore 4100
  • Shimano Deore 4100
  • Shimano Deore 4100

The Deore M4100 series also receives an updated hydraulic brake lever. The BL-M4100 non-series lever can be paired with an existing 2 or 4-piston BR-MT410 caliper to create an updated MT410 brake system. The lever has a redesigned shape and is I-SPEC EV compatible.

Shimano Deore 5100 and 4100 series components will become available in the coming weeks—check with your local bike shop.

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