Sram crankset quarq rival e1 black

Our most advanced aluminum cranks meet our most accessible power measurement. Get the data you need to progress integrated into a light stiff and strong crankset that features our x-range shifting. - 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) - crisp and accurate front shifts - integrate