2026 reference edition
E-MTB Technical Guide
Race categories, drive-unit homologation, professional bike inspection and technical compliance for the proposed Mt Stromlo eMTB Race Day. For both E-XCO and E-XCE, eBike Lab provides bike inspections; official full inspection applies only to ELITE (UCI Drive Units). SL, OPEN and OPEN PLUS are inspected to verify the 25 km/h motor-assistance cut-off.
Reference edition
UCI E-MTB Technical Guide 2026
Coverage
Race categories, drive-unit homologation, professional bike inspection and technical compliance.
Source cut-off
13 August 2026
Status
Practical reference based on four supplied documents.
Original reference document
Read the complete supplied MT Stromlo E-MTB Race and Technical Guide 2026, including its original page layout.
This guide consolidates the E-MTB and EPAC-specific content found in the supplied 2026 UCI World Championships technical guide and supplied drive-unit documents. It also records the proposed race categories and eBike Lab inspection controls.
| Priority | Document or control | Practical effect |
|---|---|---|
| 1 | Current UCI Regulations, including Arts. 1.3.010bis, 1.3.006 and 1.3.002 | Defines whether the bicycle and equipment may be used. |
| 2 | Current UCI List of Approved EPAC Drive Units | Confirms homologated model, development ID, software and approval date. |
| 3 | Event technical guide and official communiqués | Sets registration, inspection times, locations and event procedure. |
| 4 | Supplemental power-category lists supplied with this pack | Useful screening reference only; not proof of UCI homologation. |
EPAC
Only EPACs within UCI Article 1.3.010bis are authorised in UCI E-Mountain Bike events under Article 4.8.001.
Homologation
From 1 January 2025, new EPAC drive units used by licence holders in UCI E-MTB events must pass the UCI approval process.
Approval scope
The official list records manufacturer or brand, model, development ID, software version and approval date.
The proposed system separates lightweight machines, standard high-power E-MTBs, unrestricted high-performance machines and officially homologated UCI competition drive units. Final Mt Stromlo thresholds remain subject to technical consultation and applicable Australian requirements.
| Category | Technical threshold | Eligibility |
|---|---|---|
| SL — Lightweight E-MTB | Less than 60 Nm maximum torque | Lightweight e-bikes producing less than 60 Nm of torque. |
| Open — Up to 750 W | Maximum motor power no greater than 750 W | E-bikes producing no more than 750 W maximum motor power. |
| Open Plus — Above 750 W | Maximum motor power greater than 750 W | High-performance e-bikes producing more than 750 W. |
| ELITE (UCI Drive Units) | Approved motor, development ID and firmware | Bikes compliant with the current official UCI EPAC homologation list. |
ELITE (UCI Drive Units) included in the supplied reference
Shimano
DU-EP801
SRAM
Eagle Powertrain
Bosch
Performance Line CX / CX-R
Avinox
M2S Race 750
Askoll
Ultra C90A
Polini
E-P3+ EVO2
The table below reproduces the official list information supplied with this guide, identified as version 15 April 2026. A model is permitted from its publication date, subject to UCI Article 1.3.006. Later official updates may supersede this table.
| Brand | Approved model | Development ID | Approved software | Approval date |
|---|---|---|---|---|
| Askoll | Ultra | C90A | EME400 | 07 Aug 2025 |
| Avinox | M2S RACE750 | M2S RACE750 | 01.99.09.08 | 15 Apr 2026 |
| Bosch | Performance Line CX | BDU3840 / BDU3843 | 16.19.0 | 07 Aug 2025 |
| Bosch | Performance Line CX-R | BDU3863 | 16.19.0 | 15 Apr 2026 |
| Polini Motori | E-P3+ EVO2 | E-P3+ EVO2 | MTI-1.00.27 | 07 Aug 2025 |
| Shimano | DU-EP801 | DU-EP801 | 4.4.0 / 4.4.1 | 15 Apr 2026 |
| Specialized | Specialized 3.1 Motor, BD03 | G87942-100 | 1.11.4 / 1.13.1 (1.D.1) / 1.13.4 (1.D.4) | 06 Aug 2025 / 06 Apr 2026 |
| SRAM | Eagle Powertrain | DU-ETP-36V-A1 | 9.3.0 / 9.0.1 | 13 Aug 2025 |
Mechanic verification rule
- Do not verify by marketing name alone. Record the exact drive-unit model, development ID and installed software.
- Where a model has multiple permitted software versions, the installed version must be one explicitly shown in the current list.
- Check for evidence of tampering, aftermarket tuning, region or speed modifications, or non-approved firmware.
eBike Lab is responsible for bike inspections. Official full inspection, using the UCI European technical standard as a reference — including wheel measurements and software inspection — applies only to ELITE (UCI Drive Units). SL, OPEN and OPEN PLUS will be inspected to verify that motor assistance cuts off at 25 km/h. This does not limit the bike’s speed when riding without motor assistance or imply UCI sanctioning or certification.
The table and workflow below retain the supplied source procedures for reference. They do not impose full inspection on SL, OPEN or OPEN PLUS. The original PDF is unchanged and may not reflect this event-specific scope update.
| Source inspection item | Reference verification |
|---|---|
| Drive-unit model | Identify manufacturer, exact model and development ID. |
| Power and torque | Confirm classification against the selected race category. |
| Firmware and software | Read and record the installed configuration; compare against UCI approval where applicable. |
| Speed-limit settings | Verify configured assistance cut-off and detect unauthorised changes. |
| Battery and electrical safety | Inspect battery retention, connections, wiring and visible damage. |
| Mechanical condition | Check safety-critical bicycle condition before release. |
| Category compliance | Issue pass, fail or technical escalation for the selected category. |
Recommended inspection workflow
| Step | Control | Pass evidence |
|---|---|---|
| 1 | Registration | Rider entered; required event E-Bike form submitted. |
| 2 | Identity | Frame or vehicle serial, number plate and rider details recorded. |
| 3 | Drive unit | Exact brand, model and development ID checked against the current applicable list. |
| 4 | Software | Diagnostic readout checked against an approved software version where applicable. |
| 5 | Integrity | No tuning device, altered sensor, non-approved firmware or suspicious wiring. |
| 6 | Battery | Only the battery fitted for the start; no additional battery carried. |
| 7 | Functional check | Normal startup, no relevant error state and consistent assistance behaviour. |
| 8 | Seal and record | Capture the inspector, time, result and exception notes; apply the event control method. |
Failure consequence in the supplied UCI event guide: failure to submit its questionnaire, non-compliance with referenced UCI Regulations, or failure to report for inspection results in refusal of participation or disqualification. Mt Stromlo procedures will be confirmed in its final event technical guide.
Reference edition prepared from the four supplied documents. Final Mt Stromlo categories, inspection procedures, eligibility rules and event timings will be published separately after technical consultation.