What are the delivery costs?

We offer Free UK Mainland Delivery on all orders over £20. Products shipped to outlying UK regions are excluded from free shipping.

Standard delivery is normally 2 - 5 working days.

Please view our delivery page for full information on UK and international delivery costs.

• Designed for Dura-Ace 9000 chainrings. Compatible with Ultegra 6800 and 105 5800 chainrings.

• Must be paired with a compatible SRAM bottom bracket.

• ELSA RS power meter owners can upgrade using the DFour Power Meter Spider.

• Free firmware upgrades with the Qalvin app.

• BB30 versions ship with the spacers and wave washer required for BB386EVO installation.

• Bluetooth low energy technology and ANT+ wireless data transfer.

• AxCad - no magnet.

• 10K Temperature Compensation.

• Battery - CR2032, 200-hour battery life, change without tools.

• OmniCal - swap chainrings without affecting accuracy.

• 2-year warranty.

• IPX7 waterproof rating.

• Accuracy - within 1.5%, measuring both legs.

• Material - CNC Machined Aluminum Spider, Exogram™ Carbon Crank Arms

• Accuracy - 1.5%

• Bolt Circle Diameter - 110 Asymmetric BCD

• Arm Lengths - 162.5mm, 165mm, 170mm, 172.5mm, 175mm, 177.5mm

• Q-Factor - 145mm

• Bottom Bracket - GXP, Press Fit GXP, BB30, Press Fit 30, BBright, BB386EVO, BB30A, PF30A

• Wireless Technology - ANT+, Bluetooth low energy technology

• Battery - CR2032, 200 hours of riding time

• Weight - 588g

• Head Unit - ANT+™ and Bluetooth® low energy technology compatible head units (available separately)

• Analysis Software - TrainingPeaks WKO4®, TrainingPeaks®, Today's Plan, Golden Cheetah, Strava® and others (available separately)

• Compatibility - Shimano® 11-speed chainrings (except for R9100). Designed for Dura-Ace® 9000. Compatible with Ultegra® 6800 and 105® 5800.