Bosch 2026: 120 Nm, 600% and free update?
A good motor without support nearby can be expensive.
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The quick take, without the hype
More Nm does not always mean a better motor. What matters is its power delivery, support and behaviour on the trail.
| What to look at | Why it Matters | Watch out for this |
|---|---|---|
| Real-world use | An eMTB is heavier, faster and harder on components than a non-assisted bike. | Do not buy on the headline claim alone. |
| Maintenance | What looks cheap can be expensive in replacement parts. | Ask about price and availability first. |
| Support | A nearby shop, warranty support and available spare parts are worth a lot. | A spec sheet will not fix a breakdown. |
Bosch raises the stakes again in the eMTB motor battle. The Performance Upgrade 2.0 update lets certain smart system motors reach up to 120 Nm of torque and up to 600% assistance, but read the small print carefully: not all motors receive the same changes, not all the figures describe continuous output, and users must activate/configure some behaviour through eBike Flow.
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The news in a sentence
Bosch offers a free update for certain smart system motors, with more torque, more assistance and new control functions. The standout figure is clear: up to 120 Nm and up to 600% assistance in specific models.
The eMTB PRO take: This is not just an answer to Avinox. It's a way to defend users who already have a Bosch bike and don't want to change platforms to remain competitive.
Which Bosch motors receive the upgrade?
According to Bosch, Performance Upgrade 2.0 is available for several smart system drive units. They do not all receive exactly the same improvements.
| Motor | Main improvement | eMTB PRO's view |
|---|---|---|
| Performance Line CX BDU384Y | Up to 120 Nm and 600% assistance | The main beneficiary for modern eMTBs. |
| Performance Line CX-R BDU386Y | Up to 120 Nm and 600% assistance | Direct response to the most radical market. |
| Performance Line CX BDU374Y | Up to 600% assistance | More assistance, but not necessarily 120 Nm. |
| CX Race Limited Edition BDU376Y | Up to 600% assistance | More support in specific situations. |
Note: 600% does not apply all the time or in every situation
The 600% figure sounds huge, but needs careful interpretation. It does not mean the bike will deliver that maximum assistance in every situation. What matters in practice is how it helps when pulling away, on slow, steep climbs, in technical sections and whenever strong motor support is needed without making the bike feel abrupt.
What it means for a real eMTB user
- Technical climbs: more assistance at low speed and low cadence.
- Hill starts: can make it easier to pull away from a standstill in difficult sections.
- Range: more assistance can consume more if used aggressively.
- Reliability you will have to see how it affects the heat, drivetrain, chain and cassette.
eMTB PRO's first featured sponsor. Product loaned/supplied for testing. Independent opinion.
View component testingBosch vs Avinox: it's not just Nm anymore
Avinox has presented very ambitious figures and forced the whole industry to respond. But you should not buy an eMTB on its spec sheet alone.
Bosch has a clear advantage: its shop network, diagnostics, spare parts, established manufacturers and huge user base. Avinox has the wow factor, technological integration and new-product appeal. The real competition will be about usable power, range, reliability, software and service.
Quick decision table
| Status | What would I do? |
|---|---|
| I have Bosch CX BDU384Y | I would check eBike Flow and wait for confirmation from my bike brand. |
| I have an older Bosch CX with the smart system | I would check whether it receives increased assistance only, or increased torque too. |
| I am considering buying a 2026 eMTB | I wouldn't just look at Nm: I would look at battery, geometry, weight and service. |
| I am torn between Bosch and Avinox | Bosch wins in network; Avinox wins in technological impact. |
My honest view
Bosch has done what it needed to do. It could not sit back while Avinox dominated the conversation about power. But the smart move is not saying "120 Nm"; it is offering more assistance without undermining Bosch users' trust.
For me, the strong point is not the maximum number. The strong point is that a current bike can improve by software and remain competitive.
Frequently Asked Questions
Do all Bosch motors rise to 120 Nm?
No. It depends on the exact motor. Bosch distinguishes between drive units receiving up to 120 Nm and 600% assistance and others receiving partial upgrades.
Is the upgrade free?
Bosch proposes it as a free upgrade within the smart system, but availability can depend on the motor, country, bike brand and software version.
Does more Nm mean a better motor?
Not always. More torque helps in technical sections, but delivery, control, range, noise, temperature, support and reliability also matter.
Join eRIDERSeMTB on Telegram and share your experience with other riders.
Editorial sources
- Bosch eBike Systems: Performance Upgrade 2.0.
- Bosch eBike Systems Spain: 2026 news and compatible modes.
- MTBpro: Bosch CX/CX-R update test.
- eMTB PRO / eRIDERSeMTB: editorial analysis for real-world riders.
Have you used this bike, motor or component?
Join eRIDERSeMTB on Telegram to discuss real experiences with other riders: Bosch, Avinox, Shimano, deals, faults and buying decisions. The community currently speaks Spanish.
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