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SRM X-Power Road
- Design: Pedal power meter, double-sided
- Option: One-sided measurement
The second generation of SRM road pedals fits Shimano's SPD-SL cleats. The small sole distance of 9.75 millimetres to the pedal axle and the Q-factor (53 millimetres) correspond to a standard pedal. The electronics and the permanently installed battery are located inside the axle. The pedal is charged using a magnetic plug and has a battery life of 30 hours. Despite its metal construction, the pedal is very light, the release hardness can be adjusted in a practical manner and the plates engage in a defined manner. SRM specifies +/-2 per cent accuracy - which matches the measurements. The pedals are slightly ahead of the reference crank at high power (+2 per cent). The initial assembly requires the SRM app and is significantly more bumpy than with the competition. The pedals only accepted the SRM PC8 computer as a display device - no display was possible on Wahoo's Bolt or a Garmin device. According to the manufacturer, however, they should be compatible with all ANT+ and BT computers. Also available as an off-road version.
- Price: 999/1,699 Euro (one or both sides)
- Weight: 277 grams without cleats
+ Light, crisp engagement
- Installation, connectivity, battery life, price
Favero Assioma Pro MX
- Design: Pedal power meter, double-sided
- Option: One-sided measurement
The clearest difference between Favero's off-road pedal and the tried-and-tested road model is that the characteristic pod, the knob with the electronics, has been removed and moved completely into the axle. As a result, the foot clearance is the same as usual. The pedal is compatible with Shimano's SPD cleats. It is charged using a magnetic plug and the integrated battery has a runtime of around 60 hours. Compared to the road pedal, the off-road version also displays the PCO value, the position of the pressure point on the pedal. We were able to use the pedal for around 1500 kilometres under the harshest conditions, it showed no drop-outs and very high accuracy. The steel clips that surround the pedal plate are hard and corrosion-resistant.
- Price: 438/730 Euro (one/both sides) >> available here
- Weight: 382 grams (without cleats)
+ accurate, robust, inexpensive
Favero Assioma: Trendsetter
The Italians offer the sportiest price and impress with long-term precision over many years of use. The moulded electronics have proven their worth. The slightly wider foot spacing due to the electronic pods should be noted - which is not necessarily a disadvantage, depending on your individual build. Cleats: Look Kéo (kit for converting Shimano's Ultegra pedal optional), internal battery, 304 grams, 695/445 euros both/one-sided >> available here.
Look Kéo Power: Athlete
Invisible power measurement, extremely low weight, crisp entry and exit via carbon spring plate (release force: 16 Nm, replaceable carbon spring), very good accuracy. Internal rechargeable battery. 268 grams, 999/659 Euro double/one-sided >> e.g. available from Bike-Components.
Garmin Rally: Data master
Garmin's fourth-generation power pedal works accurately and offers added value with its bouquet of Cycling Dynamics indicators. Power is supplied by CR1/3N button cells (approx. 120 hours). Mounting with 15mm spanner. 322 grams, 1100/650 euros, double-sided/one-sided >> e.g. available at Rosebikes.
Wahoo Powrlink: Free spirit
Wahoo maintains the spirit of the Speedplay lollies. The power pedal is two millimetres wider and 1.5 mm higher than the standard Speedplay. Low height, adjustable freedom of rotation, precise guidance and low wear are the well-known advantages of the system. The cleat with spring mechanism is sensitive to dirt. Internal battery. 277 grams (427 grams with cleat and 3-hole adapter), 999/650 euros, double-sided/one-sided.
This is how we tested
For this test, we relied entirely on numerous comparison rides - both indoors and outdoors, with two to three devices running in parallel. A Wahoo Kickr smart trainer was used for the comparison in order to be able to compare under controlled conditions. In addition to performance in the endurance range up to 400 watts, we also tested starts and sprints up to 1,000 watts. A "majority opinion" crystallised in the crosswise comparison: The Spider power meter from SRM and several pedals from Favero display identical values for one to three watts. These are almost identical to a Power2max device that has long served as a reference. We had four pedals from Favero for comparison that were within one to three watts of each other (in the 150-400 watt range) - that's amazingly accurate. Pedals that have been in use for years show the same values as new devices. An accuracy of +/-1 per cent seems plausible.
