SRAM Quarq RED E1 threaded-mount spider

The SRAM Quarq RED E1 spider with threaded mounting is the basis of a dual-sided power meter, designed for riders seeking reliable measurements during training. The design is suitable for chainrings from 38T to 46T and aims to be light and stiff without limiting the ability to change chainrings.

The stated accuracy is +/-1.5%, even in changing weather conditions, with 10K temperature compensation and automatic MagicZero calibration as you pedal. No cadence magnet is required. The CR2032 battery is user-replaceable, with a battery life of 200 hours, and the system is IPX7 waterproof to a depth of 1 metre for 30 minutes. Bluetooth Low Energy and ANT+ connectivity. Before buying, check the DUB bottom bracket and 12/13-speed compatibility with your drivetrain.

Founded in Chicago in 1987 by Stan Day and a group of cycling enthusiasts, SRAM is still based in the US city today. It makes drivetrains and brakes for road, gravel and mountain bikes. Its story began with a single product: Grip Shift, the shifter that lets riders change gear by twisting the grip.