The M30 is part of our 30mm spindle line of cranks which also includes the A30, R30 and G30 models. The “M” stands for mountain and the “30” is for the 30mm spindle.  The best way to describe this model is, “It’s a mountain bike crank”.  Simple.  Check out the table below and compare the specs of all four crank combinations to help decide which model would best suit your needs.

Note: Spindle, crank bolts, extractors, adjusting collar, and chairing lockring included.  Chainrings and bottom bracket sold separately.

Features

• Available in black anodize or polished silver
• Extractor caps available in:
  • Anodized aluminum (black, blue, gold, pink, purple, red, and silver/clear)
  • Polished bronze
• Lengths available:
  • 165mm, 170mm, 172.5mm, 175mm, and 180mm
• Compatible White Industries chainrings:
  • TSR 1X/singlespeed
    • Compatible with 8/9/10/11/12 and 12 flat-top chains
      • Shimano 12 speed chains must use a SRAM Eagle 12-speed PowerLock connector
  • TSR Boost 1X/singlespeed
    • Compatible with 8/9/10/11/12 and 12 flat-top chains
      • Shimano 12 speed chains must use a SRAM Eagle 12-speed PowerLock connector
  • VBC 2X
    • Compatible with 9/10/11 speed chains and derailleurs (12 speed are too narrow)
      • Campy and SRAM derailleurs not recommended
      • Shimano mountain 9/10/11 speed derailleurs are best with these rings on this crank
• Also compatible with Wolf Tooth “CAMO Direct Mount Spider For White Industries”
• 5 different White Industries 30mm bottom bracket options
• All 30mm cranks and spindles are made from U.S. sourced 2024-T365 aluminum

Specs

• Designed around a 96mm OBW (Outer Bearing Width)
  • This is the allowable outside-to-outside measurement of your BB bearings (with seals) when they are mounted to your frame.  The bearing preload collar on the crank is adjustable and can accommodate slightly wider or narrower widths (+/- 1mm) than the target number.
• Designed to fit 68mm/73mm or 86mm/92mm bottom bracket shells
  • 2x 2.5mm cup or spindle spacers needed on 68mm or 86mm shells
    • Part #BB30KIT includes both types of spacers
• See “MARG30 Crank and Bottom Bracket Compatibility Chart” document below for BB/spacer info
• Weight: 575g (175mm length w/spindle)
• Q factor: 176mm
• Chainlines:

Tools

• Crank arm mounting bolts
  • Torque wrench (min 40 ft lbs or 54 Nm)
  • 10mm hex bit socket
• Chainring lockring
  • Park BBT-22 or Shimano BBT-32
• Bearing preload collar
  • 1.5mm hex key
• Extractor cap
  • Park SPA-2 pin spanner with .090”/2.3mm pins (this is the red one)

Torque

• Chainring lockring: 30 ft lbs (40 Nm)
• Crank arms: 35-40 ft lbs (48-54 Nm)
  • We recommend retorquing arms after the first ride
• Bearing preload collar bolt: ¼ turn past snug (more may crack the collar)
• Extractor caps: As tight as feels comfortable without the pin spanner slipping out of the holes

M30/A30/R30/G30 Crank Comparison Chart

*55mm chainline for Rohloff and Super Boost hubs

**This is the allowable outside-to-outside measurement of your BB bearings (with seals) when they are mounted to your frame.  The bearing preload collar on the crank is adjustable and can accommodate slightly wider or narrower widths (+/- 1mm) than the target number.