Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®
Box Two M30-P Crankset - Box®

Box Two M30-P Crankset

$399.99 Sale Save
7 reviews
Size 172.5mm
Color Black

Only 5 left in stock


All Box One and Two cranksets are engineered and crafted using our Oversized Technology. we all know that there is no use pushing hard on your pedals if you can’t deliver most of that power to the rear wheel. During the creation of our cranks, we were obsessed with Power delivery AKA pedaling stiffness. To reduce lateral deflection at the bottom bracket we chose to enlarge the spindle and the crank arm’s interfaces. We robbed material from unloaded sections to reinforce these zones of high stress. Not only are you going to be more efficient with power delivery, but you’ll also feel the instant response of acceleration. Seen through another lens, less energy will be required to achieve the same elapsed time.

Key differences: The Box Two M30-P crankset is a slightly less acute embodiment of our Oversized technology for cranksets. We squeeze in a show-stopping Praxis™ made 30mm that’s been cold-forged from 7075 T6 aluminum and then painstakingly ground to precision. You’ll be relieved to know this will all fit in a European bottom bracket. The crank arms and spider are poached from the Box One M35 model and as a result, you get all that hollow-forged generosity to help you put that power down. These cranks are engineered for the larger-sized racers.

For compatibility questions, please click here


Oversized Technology™ Hollow Forged Design
Oversized 30mm Alloy Spindle
Self-Extracting Crank Bolt System
4-bolt 104 BCD Spider with Flex-Resistant Ring
External BSA 30mm BB Included

BB86 frames require Praxis™ part 86-4001B or 86-4001W.
BB30/PF30 frames require Praxis™ part 68-4001R or 68-5401R.
T47 frames require Praxis™ part 47-0000.
Do not use pedal washers when installing pedals onto these cranks. M30-P cranks were designed to be used without pedal washers.

Box Two Chainring
Box One Chromoly Chainring Bolts
Box One 7075 Alloy Chainring Bolts
Box Two Oversized bottom bracket M30
Pedal Washers are not compatible

172.5mm 175mm 177.5mm 180mm
BB (Included): BSA 30mm 1.37
Spindle: 30mm Alloy
Material: 7075 T-6 Aluminum
Process: Hollow-Forged
Chainline: 44.5mm
Q Factor: 163mm
Weight: 800 grams / 28.2 ounces, 810 grams / 28.6 ounces, 820 grams / 28.9 ounces, 830 grams / 29.3 ounces

*Weight does not include BB
**Due to the complexity of hollow-forged manufacturing, the weights may vary +/- 10%

Customer Reviews
5.0 Based on 7 Reviews
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Filter Reviews:
Brent A.
United States United States


Snagged two sets of 172.5’s. Takes a few days of riding for them to spin freely but once they do, they spin for days. These are by far the stiffest cranks I’ve ran.

Canada Canada

Great crank set

The cranks are the best on the market very stiff and easy to install. Great product as always

Stacy B.
United States United States

Box Two M30-P Crankset

My new Box M30-P cranks are better then expected. Much lighter and stronger then imagined and according to my butt dyno, my lap times have improved too! Thank you for making the best bmx racing products on the market. Hands down, nothing beats Box components!

Sam h.
United States United States


These cranks were so much better than expected! So light and feels great each time on the track. I will use box cranks for every bmx bike I race from now on.

Randy K.
United States United States

Box two cranks

Awesome! I’m a big rider, no issues at all!