All Box One and Two cranksets are engineered and crafted using Oversized Technology. There’s no use pushing hard on your pedals if you can’t deliver most of that power to the rear wheel. During the creation of these cranks, Box obsessed over Power delivery (AKA) pedaling stiffness. To reduce lateral deflection at the bottom bracket Box chose to enlarge the spindle and the crank arm’s interfaces. They 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 Oversized technology for cranksets. Box squeezed in a show-stopping Praxis™ made 30mm that’s been cold-forged from 7075 T6 aluminum and then 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. FEATURES 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 COMPATIBILITY 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 SPECIFICATIONS 172.5mm 175mm 177.5mm 180mm BB (Included) BSA 30mm 1.37 BSA 30mm 1.37 BSA 30mm 1.37 BSA 30mm 1.37 Spindle 30mm Alloy 30mm Alloy 30mm Alloy 30mm Alloy Material 7075 T-6 Aluminum 7075 T-6 Aluminum 7075 T-6 Aluminum 7075 T-6 Aluminum Process Hollow-Forged Hollow-Forged Hollow-Forged Hollow-Forged Chainline 44.5mm 44.5mm 44.5mm 44.5mm Q Factor 163mm 163mm 163mm 163mm Weight 890 grams / 31.5 ounces 906 grams / 32.0 ounces 920 grams / 32.5 ounces 924 grams / 32.6 ounces
