Information

Product description

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.  Made here in our shop, the M30 draws on over 30 years of crank manufacturing experience with a focus on all the White Industries hallmarks; functionality, durability, and clean design.  The best way to describe this model is, “It’s a White Industries mountain bike crank”.  Simple.  The M30 is a direct replacement for most mountain cranks from the big “S” companies, but with a lot more options: two crank arm colors, eight extractor cap colors, three 1x chainlines, a 2x chainring option, and seven crank arm lengths.  Like we said, options!  Check out the comprehensive information below for all the details you’ll need to help navigate to the correct set up for your bike.

Specs

• Spindles are 30mm diameter
• Arms and spindles made in our shop from 2024-T365 aluminum
• Black anodized or polished silver (not anodized)
• Extractor caps
  • Anodized aluminum: black, blue, gold, pink, purple, red, and silver
  • Bronze (actually made out of bronze)
• Lengths
  • 155mm, 160mm, 165mm, 170mm, 172.5mm, 175mm, and 180mm
• Weight
  • 575g (175mm length w/spindle)

Compatibility

• Compatible White Industries chainrings:
  • MR30 series TSR 1X chainrings
  • MR30 series v1 VBC 2X and v2 VBC 2x chainrings
• Compatible with Wolf Tooth “CAMO Direct Mount Spider For White Industries”
• Not compatible with any other brands of chainrings
• Compatible with 5 different White Industries 30mm bottom bracket options
  • BSA, T47 external, T47 internal, PF30, and PF86/92
  • Choose the 30mm bearing option for your style of bottom bracket
• Compatible with other brands’ 30mm bottom brackets
  • You must verify that their cups’ OBW (Outer Bearing Width) when mounted (with seals) does not exceed 97mm
• Designed around a 96mm +/- 1mm OBW (Outer Bearing Width)
  • OBW 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.
• Not compatible with any crank boots/protectors that we are aware of
• M30/A30/R30/G30 Crank Comparison Chart
  

  	Mountain M30	Adventure A30	Road R30	Gravel G30
  Crank arm	M30  Mountain arms	R30 Road arms	R30 Road arms	M30 Mountain arms
  Spindle	M30 Mountain spindle	M30 Mountain spindle	R30 Road spindle	R30 Road spindle
  1x chainline (3mm offset ring, facing inward)	49mm	49mm	46.5mm	46.5mm
  1x Boost chainline  (omm offset/flat ring)	52mm	52mm	49.5mm	49.5mm
  1x chainline  (3mm offset flipped outward)	55mm	55mm	52.5mm	52.5mm
  2x chainline (measured between the 2 rings)	47.5mm	47.5mm	45mm	45mm
  Q factor	176mm	163.5mm	158.5mm	171mm
  Width between inside of arms (for chainstay clearance)	149.6mm	137mm	132mm	144.6mm
  Weight	575g (175mm w/spindle)	565g (170mm w/spindle)	560g (170mm w/spindle)	570g (175mm w/spindle)
  BB shell widths	68mm/73mm  or  86mm/92mm	68mm/73mm  or  86mm/92mm	68mm or 86mm	68mm or 86mm
  **OBW  (outer bearing width)	96mm (+/- 1mm)	96mm (+/- 1mm)	91mm (+/- 1mm)	91mm (+/- 1mm)

What’s in the box

• Two crank arms and one spindle
  • Includes crank bolts and extractor caps (installed)
  • Includes chainring mounting lockring
  • Includes crank/preload adjuster
• Does not include bottom bracket
• Does not include chainring

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

FAQ’s

• I want an M30 crank with a White Industries chainring and bottom bracket.  What parts do I need?
  • It depends on the type of bottom bracket shell your frame has.  We make bottom brackets to fit BSA, T47 external, T47 internal, PF30, and PF86/92 bottom bracket shells.  Once you determine which style you need, order that bottom bracket with the 30mm spindle/bearing option to fit the M30 crank.
  • The chainring depends on 1x or 2x set up, and what chainline you need.  Chainline is determined from frame specs and rear axle spacing which is available from the frame manufacturer. Once you get this info, navigate to the correct Chainrings page on our website.
    • 1x MR30 TSR 3mm offset ring for 49mm chainline
    • 1x MR30 TSR Boost/0mm offset ring for 52mm chainline
    • 1x MR30 TSR 3mm offset ring (flipped outward) for 55mm chainline for SRAM Transmission etc./Rolf/Superboost
    • 2x v2 VBC rings for 47.5mm chainline (measured between the rings)
• How can I figure out if the M30 crank will fit my bike?
  • Generally speaking, if you are replacing a SRAM or Shimano mountain crank, the M30 will fit fine.  The M30 is designed with standard dimensions and chainlines that fit “most” mountain bikes.  Your frame’s manufacturer should have some basic guidelines on what type of crank you need, i.e., “Mountain”, Road”, or “Gravel”.  If they say it will fit a Shimano or SRAM mountain crank, you’ll be fine.  If you have a custom frame or you’re not sure, get out your calipers and read on….
  • There are three basic measurements/clearances you need to confirm (digital calipers are best for this):
    1. Bottom bracket OBW (Outer Bearing Width) when mounted (with seals) does not exceed 97mm
       • Add the shell width to the width of the cups with seals, or mount the BB (with seals) and measure the width
    2. Crank arms don’t hit the frame
       • The chart above has a “Width between crank arms for chainstay clearance” measurement of 149.6mm for the M30 crank
         • Outside width of the chainstays measured at 190mm (that’s about the end of the crank arm) behind the BB center can be no wider than 137.6mm.  That gives you at least 6mm of clearance between each arm and the chainstay. (149.6mm – 137.6mm)/2 = 6mm
    3. Chainring doesn’t hit the frame
       • Determine which of the four chainlines you need (Non Boost 49mm, Boost 52mm, SRAM Transmission etc 55mm, or 2x VBC)
       • Determine how many teeth you want
       • Now check out the “MR30 Crank and Chainring Dimensional Drawings” document below
       • Find the “Y2” dimension (that’s the radius of the chainring) for the chainring size/teeth you want
       • Measuring from the center of the BB shell, put a pencil mark at the Y2 dimension on your chainstay (this is where the chainring teeth will pass the chainstay)
       • Measure the outside width of the chainstays at this spot, and divide by 2.
       • Subtract this measurement from the chainline number you chose, and this gives you your chainring to chainstay gap/clearance
         • 5mm would be the minimum gap we’d like to see between the ring and chainstay, more if your frame is kind of flexy
       • Ex: You want to run a 3mm offset (facing inward) 32T 1x TSR ring
         • Your chainline will be 49mm
         • The Y2/radius measurement for the 32T ring is 69.8mm
         • Let’s assume your chainstays are 86mm wide measured at 69.8mm behind the BB center
         • 49mm – (86mm/2) = 6mm.  This is the gap between the ring and your chainstay
           • 5mm would be the minimum gap we’d like to see between the ring and chainstay, more if your frame is kind of flexy
       • If your frame has asymmetrical chainstays you’ll have to figure out a different way to measure for chainring clearance.  All the specs are in the “MR30 Crank and Chainring Dimensional Drawings” document below.
• What bottom bracket do I need to fit the M30 crank?
  • It depends on the type of bottom bracket shell your frame has.  We make bottom brackets to fit BSA, T47 external, T47 internal, PF30, and PF86/92 bottom bracket shells.  Once you determine which style you need, order that bottom bracket with the 30mm spindle/bearing option to fit the M30 crank.
• Can I use a different brand bottom bracket with the M30 crank?
  • Yes, as long as it has a 30mm bearing and the OBW (Outer Bearing Width) when mounted (with seals) is no wider than 97mm.
  • For Chris King bottom brackets refer to the “Chris King Bottom Bracket Spacer Chart” below.
• How many spacers do I need with the M30 crank?
  • If you use one of our bottom brackets you will not usually need spacers
    • Refer to our bottom bracket pages for specific spacer info for your type of bottom bracket
  • For other brands of bottom brackets you will need to determine the OBW (Outer Bearing Width) when mounted (with seals)
    • Compare that number to the 96mm +/- 1mm OBW of the M30 crank
      • If the OBW of your bottom bracket is wider than 97mm, it will not work with the M30 crank
      • If the OBW of your bottom bracket is narrower than 95mm, you will need a 30mm spacer kit available under Parts>Bottom Bracket Parts>Bottom Bracket Spindle Spacer Kits.  Add an even number of spacers on each side to take up the difference
  • For Chris King bottom brackets refer to the “Chris King Bottom Bracket Spacer Chart” below
• Can I use a different brand of chainring with your crank?
  • The only one we’re aware of that fits is the Wolf Tooth “CAMO Direct Mount Spider For White Industries” chainring system.
• Can I use the M30 crank on my downhill or enduro bike?
  • Maybe, but it is more of a “XC/trail” crank than a “heavy duty” DH/enduro crank.  And as such, it’s not designed to be “indestructible” and can bend or break if you’re excessive.  What’s excessive?  If you have to ask, you should probably get someone else’s crank.
• How can I restore that shiny silver finish on my polished raw aluminum White Industries cranks?
  • Use “Mothers Mag and Aluminum Polish” with a microfiber rag.  Start with heavy pressure and lighten up towards the end
• Where can I find replacement parts for my cranks like extractor caps and mounting bolts?
  • Go to the Parts>Crank Parts page.
• Are crank boots/protectors available for the M30 cranks?
  • We do not offer them and are not aware of any that are compatible.
• Can I use a power meter with the M30 cranks?
  • It’s certainly possible if you can find one that is compatible with our crank, but as of now we’re not aware of any that are compatible.

Technical Documents

• MR30 Crank Assembly
• MR30 Crank and Bottom Bracket Compatibility Chart
• Bottom Bracket Tool Compatibility
• MR30 Crank and Chainring Dimensional Drawings
• Chris King Bottom Bracket Spacer Chart