Sram:

We cut grams out of our aluminum crankarms, but didnt cut corners on power measurement. Our light and accurate spindle-based power unit nestles into our striking redesigned arms to give you the data you need, and our newest direct mount chainrings are light and stiff while looking good.

Features

• Spindle-based unit measures left side power to calculate total watts
• Long battery life (400+ hours) to power a season of rides
• User replaceable AAA lithium battery
• DUB bottom bracket adds durability and simplicity
• Waterproof (IPX7 waterproof to 1 meter for 30 mins)
• Lightweight (less than 40g heavier than standard crankset)
• SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control
• Wide chainline for compatibility with Full Mount rear derailleurs

SPECIFICATIONS

Speeds 12, 13
BB Compatibility All SRAM Road DUB BBs
Chainring Size 42T
Crank arm length 160mm, 165mm, 170mm, 172.5mm, 175mm
Chainline 47.5mm
BB Spindle Interface DUB
Chainring material Aluminium
Guard No Guard
Bolt Circle Diameter (BCD) Direct Mount (DM)
Crank arm material Aluminium
Colour (Crank arm) Black
Power meter Yes
Power Meter Type Spindle