Magene PES P515 Power Meter Crankset Review: Accurate Power at a Lower Price

Introduction

A power meter is one of the most practical ways to make winter training more efficient. It turns every ride into usable data, so effort can be measured rather than guessed, and progress can be compared honestly from one month to the next.

The Magene PES P515 is a spider-based power meter built into a complete crankset, priced at £225. It uses a 24mm spindle, which makes it a direct replacement for Shimano road cranks, and it is supplied with chainrings in the size of your choice. That combination puts real power measurement within reach of riders who would otherwise be looking at four-figure options.

This review covers what arrives in the box, how the crankset installs, how it performs on the road, and how its power readings compare with a separate dual-sided power source.

Who the Magene PES P515 Is For

This crankset is aimed at riders who want dependable power data without paying premium prices. Buyers can choose crank arm lengths down to 165mm, which matters for riders chasing a more aggressive position or a shorter effective reach, and chainrings are available in compact, semi-compact, and standard options. The review unit came with 52-36 chainrings, matching a typical road setup.

The power meter itself sits in the spider and is both ANT+ and Bluetooth compatible, so it pairs with a broad range of head units and training apps. It carries an IPX7 waterproof rating and a claimed run time of 300 hours, with a charging port on the pod.

Because the spindle is 24mm, the P515 is a like-for-like swap on Shimano-equipped road bikes, with no new bottom bracket or unusual tools required. Riders who train indoors through the winter and outdoors in better weather are the clearest fit, particularly anyone who wants power numbers that stay consistent across both environments.

Main Strengths: Stiffness, Shifting, and Power Consistency

Installation is straightforward. The crankset follows the same general procedure as the Shimano crank it replaces, including a preload cap, and the accompanying quick start guide covers the assembly steps clearly. Anyone who has fitted a modern two-piece road crank before will recognise the process.

On the road, the crank arms feel as stiff as the Shimano Ultegra unit they replaced. There is no noticeable difference when pushing hard on a climb, standing out of the saddle, or sprinting. Weight is also comparable to the Ultegra crankset, so the swap does not add a meaningful penalty. Front shifting quality is very good as well, and over weeks of use on the workstand and on open roads it performs at a level comparable to Shimano, which remains the reference point for front derailleur shifts.

The power data is the part that matters most, and here the results are reassuring. In a 26-minute indoor session compared against a dual-sided pedal power meter, the P515 averaged 200 watts against 195 watts, with a maximum of 426 watts against 404 watts and a minimum of 8 watts against 2 watts. The two traces tracked closely throughout, with no spikes or dropouts, and the Magene consistently read a few watts higher rather than drifting unpredictably.

That consistency is what makes a power meter useful. A reading of 300 watts in January should still mean 300 watts in July, and the P515 held that repeatability across weeks of riding.

Things to Consider Before Buying

The non-drive side crank arm uses a single pinch bolt, where a Shimano arm of this type uses two. That design difference puts more weight on correct installation, and there are reports of crank arms working loose when the procedure is not followed precisely. Installed carefully and checked after the first rides, the arm stayed securely attached to the spindle throughout testing.

Cosmetically, the PES branding on the crank arm is bold and prominent. It is a small point, but riders who prefer a subtle build may find it louder than they would like.

The chainrings use pins and a ramp profile, though with less material machined away than a Shimano equivalent, and shift quality was still very good in practice. On accuracy, the meter read slightly higher than the reference power source in the comparison session. That is normal between power meters, but it is worth knowing if you also use a second power source and expect the numbers to match exactly.

Charging is another routine to plan for. The claimed 300-hour run time keeps the interval long, and the port is easy to reach, but it is still a battery that needs attention rather than a coin cell you can forget about.

Buying Advice: Is the P515 Worth It?

At £225, the P515 undercuts the established names by a wide margin. A comparable Shimano Ultegra power meter is listed at around £1,000 retail, and a dual-sided pedal power meter sits at roughly £900. Against those figures, the Magene delivers accurate, repeatable power data, comparable stiffness, and very good shifting for a fraction of the cost.

The strongest case for the P515 is on a Shimano-equipped road bike where a 24mm spindle drops straight in and the crank length and chainring options match what you already ride. Riders who want to keep their existing pedals, avoid swapping between bikes, and stay within a modest budget get the most from it. If you already run a reliable pedal-based system and only want a second data point, the upgrade case is weaker. For everyone else, this is one of the more sensible ways to start training with power.

Conclusion

The Magene PES P515 delivers on the essentials. Installation is simple, stiffness and shifting are comparable to a well-regarded Shimano crankset, weight is similar, and the power readings tracked a dual-sided pedal meter closely with consistent numbers from ride to ride. The single pinch bolt deserves careful installation, and the bold PES graphics will not appeal to everyone, but at £225 the value is difficult to argue with.