Information
Product description
The A30 is part of our 30mm spindle line of cranks which also includes the M30, R30 and G30 models. The “A” stands for adventure and the “30” is for the 30mm spindle. Made here in our shop, the A30 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, “kind of odd and probably not going to fit your bike.”
The A30 combines our R30 road crank arms with our M30 mountain spindle to give you an odd mix of a mountain chainline with narrower crank arms that will not fit on a mountain bike. So what bikes will this fit, and why would I need it? There are some gravel frames out there (mostly custom made) with 73mm wide bottom bracket shells that require a longer spindle than the R30 or G30 crank has, but also have narrower chainstays that don’t need the wider crank arm stance of the M30 crank. That’s where the A30 comes in. Think of it as a mountain crank with a slimmer Q factor. They come in two crank arm colors, eight extractor cap colors, three 1x chainlines, a 2x chainring option, and six crank arm lengths. 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, and 175mm
- Weight
- 565g (170mm 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 A30 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 A30 crank will fit my bike?
- Generally speaking, this is not a common crank so be careful. You are probably better off with an M30 crank, but if you really want to use the A30, get out your calipers and read on….
- There are three basic measurements/clearances you need to confirm (digital calipers are best for this):
- 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
- Crank arms don’t hit the frame
- The chart above has a “Width between crank arms for chainstay clearance” measurement of 137mm for the A30 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 125mm. That gives you at least 6mm of clearance between each arm and the chainstay. (137mm – 125mm)/2 = 6mm
- The chart above has a “Width between crank arms for chainstay clearance” measurement of 137mm for the A30 crank
- 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 47.5mm)
- 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) 42T 1x TSR ring
- Your chainline will be 49mm
- The Y2/radius measurement for the 42T ring is 90.2mm
- Let’s assume your chainstays are 80mm wide measured at 90.2mm behind the BB center
- 49mm – (80mm/2) = 9mm. 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.
- Bottom bracket OBW (Outer Bearing Width) when mounted (with seals) does not exceed 97mm
- What bottom bracket do I need to fit the A30 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 A30 crank.
- Can I use a different brand bottom bracket with the A30 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 A30 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 A30 crank
- If the OBW of your bottom bracket is wider than 97mm, it will not work with the A30 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
- Compare that number to the 96mm +/- 1mm OBW of the A30 crank
- For Chris King bottom brackets refer to the “Chris King Bottom Bracket Spacer Chart” below
- If you use one of our bottom brackets you will not usually need spacers
- 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.
- 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 A30 cranks?
- We do not offer them and are not aware of any that are compatible.
- Can I use a power meter with the A30 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.
