The advantages of training with a powermeter become accessible to even more people thanks to the competitively priced SRAM Rival Powermeter. This crank combines the advantages of the Rival Crankset with Quarq's long experience in powermeters. Lots of tech in a small package The electronics which measure the power are cleverly hidden in the DUB axle. This ensures that this power meter is very resistant to bad weather conditions while the weight of this addition is minimal. The use of this DUB-shaft ensures that this Powermeter fits in almost every frame. Battery life The SRAM Rival eTAP power meter does not have an internal battery, but uses a replaceable lithium AAA battery. The downside of this is that you'll need to replace it from time to time. Luckily, the battery lasts for more than 400 hours, which is a lot longer than most internal batteries found in other power meters. X-Range technology X-Range technology allows you to get a more efficient drivetrain by moving your shifting range from your crank to your cassette. SRAM has designed the Rival cassettes to give you smaller but more consistent intervals between gears. This also makes it possible to get a larger range. All in all, this ensures that you can stay on the same chainring for longer on this SRAM Rival crank, allowing you to shift up or down more smoothly. DUB bottom bracket The DUB technology ensures that the bottom bracket and crank arm are not only rigid and transmit power instantly, but also that the crank lasts a long time. By simply integrating the crank, bottom bracket and sprockets you can expect better power transfer and less maintenance in return. Installation is also very easy!