The Bosch Performance Line SX Motor Is a Year Old—What Does It Tell Us About the Future?

Throughout the summer time of 2023 Bosch launched a brand new motor, the Efficiency Line SX. That is Bosch’s lightest drive unit so far, weighing solely 2.0kg (4.4 lbs.). What makes the Bosch Efficiency Line SX so particular isn’t simply that it’s mild; it is usually highly effective. At peak energy output it produces 600W.

Mild is sweet for performance-oriented e-bikes akin to eMTBs, highway and gravel e-bikes, however mild solely will get us to this point. There are different light-weight motors on the market. The Brose-made Specialised SL 1.2 motor weighs simply 1.95kg (4.3 lbs.) and produces 320W at peak. The TQ HPR 50 weighs a tiny bit lower than the Specialised, at 1.85kg (4.1 lbs.) and produces almost as a lot wattage at peak: 300. The Fazua Experience 60 improves on each of these by operating in the identical neighborhood weight-wise (1.96kg), however producing a extra muscular 450W.

The distinction in weight between the Bosch Efficiency Line SX and the Fazua Experience 60 is 40g, or about 1.4 oz., which is roughly the load of a slice of bread, or $1.75 in quarters. The distinction between the Bosch and the TQ is about ⅓ of a one-pound field of pasta or a bit greater than two Clif bars that you just would possibly carry alongside on an extended trip. We’re speaking very small quantities of weight … however a giant distinction in energy.

It’s straightforward to see that the Bosch Efficiency Line SX motor presents almost double the power-to-weight ratio of each the Specialised and TQ motors and roughly 33 % greater than the Fazua Experience 60. That is what makes the Bosch motor so thrilling. Even in comparison with Bosch’s coveted Efficiency Line CX motor it shaves nearly a 3rd of the load whereas producing the identical peak wattage. It does hand over some torque, although—55Nm for the SX in comparison with 85Nm for the CX.

E-bike producers making high-end eMTBs have been racing to launch eMTBs utilizing the motor. As a result of the Efficiency Line SX motor is basically housing-less, it makes use of a unique mount, which signifies that producers can’t merely resolve to swap out the Efficiency Line SX motor for the Efficiency Line CX motor. Manufacturers should design an eMTB or different e-bike with the motor’s mount built-in within the design.

As a result of a producer can spend two years designing a brand new mannequin or revising an current one, and since the Efficiency Line SX motor is just one yr outdated, most firms have but to start providing an e-bike geared up with this motor.

That’s to not say you’ll be able to’t discover it on the market. There have been loads of early adopters. It may be present in Canyon’s Neuron:ONfly, the E-Lyte from Whyte Bikes, Norco’s Fluid VLT, Orange’s Section EVO, the E-Troy Lite from Devinci, Mondraker’s Dune, the KTM Macina Race and Macina Scarp, M1-Sporttechnik’s 400 variants, and the Sonic EVO and Sonic EVA from Bulls.

In bike racing absolutely the measure of a bicycle owner’s health is gauged by what number of watts they’ll generate per kilogram of physique weight. It’s the identical for motors; the Bosch Efficiency Line SX generates 300W/kg and that quantity is the one which rivals like Shimano and Yamaha can be aiming to match.

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