The G30 is part of our 30mm spindle line of cranks which also includes the M30, A30 and R30 models. The “G” stands for gravel and the “30” is for the 30mm spindle. 

This combo lives in that wide open world occupied by bikes that are neither road nor mountain and can be the perfect solution when more crankarm-to-chainstay clearance is needed, while keeping the road chainline of the R30 crank.  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 chainring 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 road derailleurs are best with these rings on this crank
        • 11 speed Di2
        • 9/10/11 speed 105/Ultegra/Dura Ace/GRX
• 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 91mm 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 or 86mm bottom bracket shells
• See “MARG30 Crank and Bottom Bracket Compatibility Chart” document below for BB/spacer info
• Weight: 570g (175mm length w/spindle)
• Q factor: 171mm
• Chainlines:

• 1x standard TSR ring  (3mm offset, facing inward)	1x Boost TSR ring    (0mm offset/flat)	1x standard TSR ring    (flipped outward for Rohloff or Super Boost)	2x VBC rings  (measured between the 2 rings)
  46.5mm	49.5mm	52.5mm	45mm

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.