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Bosch's fifth-generation Performance Line CX is the quiet, controlled benchmark of the full-power class — and after two free firmware upgrades it now claims 120 Nm and 750 W, answering DJI's Avinox on refinement if not raw watts, without changing a single bolt.

Shimano's EP801 — the firmware-evolved EP8 — remains the lightweight benchmark of the mid-power class: 85 Nm of torque from just 2.65 kg, tuned for riders who like to spin rather than grind.

DJI's flagship is the most powerful production eMTB motor yet measured — 150 Nm Boost and a dyno-verified 1,450 watts at the cranks, in a 2.59 kg package. Here's what that actually feels like on the trail, where it lands against Bosch, and the one thing no-one can vouch for yet: how it holds up over time.

Shimano's 2020 game-changer: the DU-EP800 (EP8) shed weight, slimmed the Q-factor to 177 mm and turned the wick up to 85 Nm, dragging Shimano back into the fight with Bosch after the underpowered E8000 era. Not to be confused with the later EP801, which shares this hardware but adds firmware that lifts peak power.

Bosch's featherweight Smart System drive squeezes near-full-power peaks from a 2 kg package — but only if you spin it like a road racer. Torque is 55 Nm by default, raisable to 60 Nm in the eBike Flow app (60 Nm ships as standard on post-October-2025 bikes); the headline 600 W peak only arrives at high cadence. On the dyno its trick is cadence, not grunt.

TQ's second-generation whisper motor adds torque and power without losing the plot: still the smallest, lightest and quietest mid-drive in eMTB, now with a wider usable power band and the thermal stamina its predecessor lacked.

The Avinox M2 is DJI's 2026 second-generation lightweight drive unit: the cooler, more frugal sibling to the headline M2S, pairing a claimed 110 Nm (125 Nm in Boost) and up to 1,100 W with a 2.65 kg package that still undercuts almost every full-power rival. It ships on the Amflow PR Carbon.

Bosch's first dedicated race motor: the Gen 5 CX drive in a lighter magnesium-and-titanium body with ceramic bearings and an exclusive Race mode. Free Performance Update 2.0 (May 2026) lifts it to up to 120 Nm and up to 600% support, putting Bosch back in the full-power fight with DJI's Avinox.

Specialized's 3.1 motor is the standard tune of the Levo 4's drive unit — the same physical hardware as the S-Works version, firmware-locked to a claimed 105 Nm and 810 watts. A free over-the-air update in February 2026 lifted the claimed peak from 666 to 810 watts, dropping it into the modern full-power top tier. On Velomotion's dyno the standard tune actually delivers around 725 watts — the 810-watt figure is Specialized's claim, and the measured number for the hotter S-Works tune.

DJI's debut e-bike motor stunned the lab: a 2.52 kg featherweight that out-muscles drives twice its size. In Boost it claims 120 Nm and 1000 W; in normal modes 105 Nm and 850 W — headlining the Amflow PL Carbon and rewriting what a lightweight system can do.

DJI Avinox's motor-gearbox concept bakes stepless virtual gearing into the motor. There's no derailleur and no cassette, a 520% range, sub-0.1 s shifts, and it shifts under load and at a standstill. Shown at Eurobike 2026 on Canyon, Commencal, Forbidden and Mondraker mules, with a 2027-or-later horizon.

Gobao's e-MTB flagship is a 150 Nm / 1,500 W mid-drive with an Electronically-controlled CVT built in. The gearing lives inside the unit, so there's no rear derailleur and no cassette, just AI ratio control. A 750 Wh pack super-charges from 10 to 80% in about 20 minutes. Shown as a concept at Eurobike 2026, with production due February 2027.

Giant's flagship 2026 drive jumps to 48 volts, co-developed with Yamaha and widely understood to use the new 48 V PW-X4 platform. Giant quotes 90 Nm of sustained torque and 800 W of peak power, with the instant low-cadence punch SyncDrive has always been known for.

Maxon's first true full-power eMTB motor: a claimed 90 Nm and 620 W peak from a Swiss-built 2.0 kg drive unit the brand calls the lightest full-power motor on the market.

The Brose Drive S Mag was the connoisseur's mid-drive: a magnesium-cased, belt-driven motor whose silky, near-silent delivery and strong low-cadence torque made it the favourite of brands like Specialized, BULLS and Rotwild long before the current torque wars. It is now a legacy unit, superseded in 2025 by Brose's 48V Drive³ Peak.

Mahle's first full-power mid-drive is a featherweight heavyweight: a claimed 105 Nm and 850 W from a 2.5 kg, 48-volt unit that undercuts almost every rival on the scales while matching them for grunt — and an independent dyno measured 795 W of that.

The S-Works tune of Specialized's 3.1 drive unit is the brand's most potent mid-motor yet — a Brose-built, 50-volt unit lifted by a free over-the-air update to a measured 850-watt peak and 111 Nm, and on the ebike-lab dyno it holds its sustained output flat to within 1% for a quarter of an hour, pulling hard long after rivals fade.

Fazua's Ride 60 is the lightweight-motor benchmark for riders who want most of a full-power feel in a sub-2 kg package: 60 Nm of torque and a measured 525 W ceiling that brushes the bottom of the full-fat class — climbing to roughly 625 W with the time-limited Boost engaged.

Shimano's value-tier full-power motor: the EP801's 85 Nm punch and ~500 W ceiling poured into a cast-aluminium housing to hit a lower price, at the cost of roughly 400 g over the magnesium-cased flagship. On the dyno it gives away almost nothing.

Rocky Mountain's lightweight take on its in-house Dyname drive: a magnesium-cased, chain-tension-sensing motor that trades all-out grunt for a trail-natural feel, and which a September 2025 firmware update bumped from 65 Nm to a claimed 75 Nm.

TQ's HPR50 is the featherweight that redefined what a 'light' e-MTB motor could be: 1.85 kg, near-silent, and built around a radical Harmonic Pin-Ring gearbox that trades outright grunt for an uncanny, ride-like naturalness. TQ claims 50 Nm and a 300 W peak; independent labs measure roughly 38 Nm and ~283 W at the wheel.

Yamaha's smallest, lightest mid-drive yet trades headline wattage for a quiet, natural, torque-rich delivery that thrives the moment you put the power down.

Bosch's 2022 race-only twist on the Gen 4 CX platform: the same 85 Nm and 600 W as the standard motor, but with an exclusive Race mode dialling support to 400% and pushing usable power to far higher cadences. Built for UCI E-MTB starting grids, not extra torque.

BH's first in-house drive unit, the BHZ by SEG, is a Spanish-built lightweight motor that puts 65 Nm and a 500-watt peak into a 2.1 kg package, the heart of BH's iLynx Trail and Race Carbon SL e-MTBs.

Pinion's MGU E1.12 is a radical full-power motor with a 12-speed gearbox built into the same housing, replacing the derailleur entirely. It trades 4.1 kg of mass for a 600% gear range and genuine tractor-like climbing.

SRAM's first e-MTB drive isn't really SRAM's at all: it's a Brose Drive S Mag in a new suit, retuned for the quietest, most natural-feeling power delivery in the class and wrapped around Eagle Transmission's Auto Shift.

Shimano's EP801 RS is the Orbea-exclusive 'Rider Synergy' tune of the full-size EP801: same 2.65 kg hardware, but software that lets the rider toggle between an efficient RS natural mode (54 Nm) and a full-fat RS+ climbing mode (85 Nm) - and the second-generation tune now hands over that full 85 Nm from as low as ~45 rpm. It is the motor that finally let the Orbea Rise blur the line between light and full-power eMTB.

Specialized's second-generation light-assist drive, the SL 1.2, takes the near-silent, sub-2 kg minimalism of the original and adds the muscle it was missing: 50 Nm and a claimed 320 W peak, with 280 W measured to the wheel on Velomotion's bench — enough to make the Levo SL Gen 2 feel like a real trail bike rather than a fitness aid.

Giant's Yamaha-built SyncDrive Pro2 is the quiet, composed climber of the full-power class — 85 Nm of torque and 400% support wrapped in one of the smoothest, most controllable deliveries you can buy.

The Gen 4 race-tuned Bosch CX — the same 85 Nm / 600 W hardware as the standard Performance Line CX, but unlocked to a flat 400% Race mode and a double dose of Extended Boost for riders who want everything the motor has, all the time.

Shimano's 2018 mid-tier eMTB drive: 60 Nm and a deliberately gentle, natural delivery aimed at leisure trail riders rather than uphill racers. Lighter and quieter than the E8000 it sat beneath, it now lives on mainly in the second-hand market.

Giant's SyncDrive Sport is the brand's Yamaha-built mid-drive (a re-badged PW-ST) found on its trekking and sportier touring e-bikes rather than its hardcore eMTBs. Quiet, smooth and easy-going, it trades outright punch for refinement, and it has since spawned punchier Sport 2 and Sport 3 successors.

Polini's E-P3+ MX is Italy's quiet outsider in the full-power eMTB motor wars: a claimed 90 Nm and 600 W peak from a compact 2.95 kg, fully user-serviceable mid-drive built by an 80-year-old small-engine specialist — with a 2026 EVO2 limited series pushing the MX variant to a claimed 105 Nm.

Gobao's P100 is the value-tier Chinese full-power mid-drive that ambushed the establishment: 100 Nm, a 750 W maximum with a published 87% efficiency, and a Velomotion dyno verdict that placed its peak level with the Sachs RS.

Bafang's lightest mid-drive, the M820 chases the lightweight-eMTB class with a 2.3kg magnesium drive unit and a torque split that independent testers read as roughly 75Nm sustained and a peak near 95Nm, topped by a 'Rocky' boost mode whose real-world value reviewers question.

Rocky Mountain's in-house Dyname 4.0 is the quirky outsider of the mid-motor world: the motor sits above the bottom bracket and feeds the chain through its own sprocket, with a second sprocket reading chain tension to gauge rider effort. The result is a uniquely sporty, demanding character.

Maxon's first e-bike drive is the featherweight of the SL world: a roughly 1.9 kg Swiss-made motor built for riders who want a whisper of help, not a shove. It chases lightness and a natural pedal feel over outright punch — 30 Nm nominal, peaking to 40 Nm.

Shimano's 2018 city-and-trekking STEPS unit: 60Nm, 250W rated and a claimed ~500W peak in a 2.8kg casing, with up to 300% assist. Capable, quiet and frugal for commuting and light trails, but never intended as an eMTB motor.

Giant's SyncDrive Pro2 is a Yamaha PW-X3 motor re-tuned by Giant's own firmware: a 36 V, 85 Nm full-power unit whose party trick is how naturally it turns hard rider input into a big surge of power. Note it is now one generation back — the 48 V SyncDrive Pro 3 (90 Nm, 800 W peak) launched on the 2026 Reign Advanced E+ and is Giant's current flagship.

The Brose-built Turbo Full Power 2.2 was the quiet, belt-driven heart of the Specialized Levo Gen 3 (2022-2024) — a smooth 90 Nm full-power unit prized for its near-silent, organic delivery rather than headline numbers.

Giant's entry-level SyncDrive unit, built in cooperation with Yamaha for the brand's e-trekking and recreation bikes. It trades the headline torque of an eMTB drive for compact size, low weight and a deliberately natural, hands-off feel.

Panasonic's flagship full-power eMTB motor for the FIT ecosystem: 95 Nm and a measured turn of speed that runs the Sachs RS close on the dyno, paired with a deliberately rider-led 300% support (FIT's published figure) that asks more of your legs than the German mainstream.

Shimano's first proper eMTB flagship, launched in 2016 to take the fight to Bosch. Compact, torque-sensing and tuned for a natural pedal feel rather than raw shove. Now superseded by EP8/EP801, but still a benchmark for how a mid-drive should read your input.

Fantic's own-brand mid-drive on the XMF, XEF and XTF lines is a Brose Drive S Mag underneath, Fantic-tuned: a single-rated 90 Nm, a Velomotion-measured 712 W peak, and the quietest belt-drive delivery in its class. It is a previous-generation unit, since superseded by Brose's belt-free Drive³ Peak, but one Fantic still ships across its 2026 range.

The Specialized 2.1 is Brose's Drive S Mag in Turbo livery — the belt-driven motor that powered the 2019-2021 Levo Gen 2 and Kenevo. Quiet, smooth and surprisingly elastic, it traded outright punch for the most refined power delivery of its generation.

Yamaha's 2020-era flagship eMTB mid-drive: an 80Nm, 250W-rated unit that traded the previous PW-X's narrow punch for a notably wider power band, holding assist all the way to a class-leading 170rpm cadence. Discontinued in favour of the PW-X3, but still common on the second-hand Haibike, Giant and R Raymon market.

Germany's home-grown heavyweight: the Sachs RS pairs ZF's headline 112 Nm with 898 W of measured peak power on Velomotion's dyno — second only to the TQ HPR120S — wrapped in an unapologetically aggressive delivery.

Specialized's first full-power motor: the steel-housed Brose mid-drive co-developed exclusively for the original Turbo Levo FSR and Kenevo. Whisper-quiet carbon-belt drive that defined the brand's early eMTB character.