Smart Bike Trainer Product
A direct-drive smart bike trainer: the rear wheel comes off and the bike bolts straight to a cassette on the trainer, which simulates road resistance and gradients with an electromagnetic brake and broadcasts speed, power, and cadence over ANT+/BLE. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
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Bill of materials
13 top-level lines · 69 rows shown · 370 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Frame & Base 5 parts | sbt-frame | 1× | 1 | 10 | assembly |
| 1.1 | Cast Steel Frame | sbt-cast-frame | 1× | 1 | — | part |
| 1.2 | Folding Leg | sbt-folding-leg | 2× | 2 | — | part |
| 1.3 | Rubber Foot | sbt-foot | 4× | 4 | — | part |
| 1.4 | Leveling Adjuster | sbt-leveling-adjuster | 2× | 2 | — | part |
| 1.5 | Fastener Set | fastener-set | 1× | 1 | — | part |
| 2 | Drive Unit 8 parts | sbt-drive-unit | 1× | 1 | 11 | assembly |
| 2.1 | Cassette Body | sbt-cassette-body | 1× | 1 | — | part |
| 2.2 | Sprocket Cassette | sbt-cassette | 1× | 1 | — | part |
| 2.3 | Freehub | sbt-freehub | 1× | 1 | — | part |
| 2.4 | Ball Bearing | ball-bearing | 4× | 4 | — | part |
| 2.5 | Drive Belt | drive-belt | 1× | 1 | — | part |
| 2.6 | Drive Pulley | sbt-drive-pulley | 1× | 1 | — | part |
| 2.7 | Flywheel Pulley | sbt-flywheel-pulley | 1× | 1 | — | part |
| 2.8 | Inertia Flywheel | sbt-flywheel | 1× | 1 | — | part |
| 3 | Electromagnetic Resistance Unit 6 parts | sbt-resistance-unit | 1× | 1 | 40 | assembly |
| 3.1 | Electromagnet Coil Assembly 3 parts | sbt-electromagnet | 1× | 1 | 3 | assembly |
| 3.1.1 | Copper Winding | copper-winding | 1× | 1 | — | part |
| 3.1.2 | Coil Bobbin | sbt-coil-bobbin | 1× | 1 | — | part |
| 3.1.3 | Laminated Pole Core | sbt-pole-core | 1× | 1 | — | part |
| 3.2 | Stator Assembly 3 parts | stator-assembly | 1× | 1 | 3 | assembly |
| 3.2.1 | Stator Core (laminations) | stator-core | 1× | 1 | — | part |
| 3.2.2 | Copper Winding | copper-winding | 1× | 1 | — | part |
| 3.2.3 | Slot Insulation | stator-insulation | 1× | 1 | — | part |
| 3.3 | Rotor Assembly 4 parts | rotor-assembly | 1× | 1 | 19 | assembly |
| 3.3.1 | Rotor Shaft | rotor-shaft | 1× | 1 | — | part |
| 3.3.2 | Rotor Core | rotor-core | 1× | 1 | — | part |
| 3.3.3 | Neodymium Magnet | neodymium-magnet | 16× | 16 | — | part |
| 3.3.4 | Ball Bearing | ball-bearing | 1× | 1 | — | part |
| 3.4 | Neodymium Magnet | neodymium-magnet | 12× | 12 | — | part |
| 3.5 | Ball Bearing | ball-bearing | 2× | 2 | — | part |
| 3.6 | Brake Housing | sbt-brake-housing | 1× | 1 | — | part |
| 4 | Control Board 6 parts | sbt-control-board | 1× | 1 | 229 | assembly |
| 4.1 | Bare PCB | pcb-bare | 1× | 1 | — | part |
| 4.2 | Compute SoC Module | soc-module | 1× | 1 | — | part |
| 4.3 | Microcontroller | mcu | 1× | 1 | — | part |
| 4.4 | Brake / Motor Driver 4 parts | sbt-motor-driver | 1× | 1 | 38 | assembly |
| 4.4.1 | Power MOSFET | mosfet | 6× | 6 | — | part |
| 4.4.2 | Gate Driver IC | gate-driver-ic | 1× | 1 | — | part |
| 4.4.3 | Power Inductor | power-inductor | 1× | 1 | — | part |
| 4.4.4 | SMD Passive (R/C/L) | smd-passives | 30× | 30 | — | part |
| 4.5 | SMD Passive (R/C/L) | smd-passives | 180× | 180 | — | part |
| 4.6 | Connector | connector | 8× | 8 | — | part |
| 5 | Sensor Pack 4 parts | sbt-sensor-pack | 1× | 1 | 34 | assembly |
| 5.1 | Hall Sensor | hall-sensor | 1× | 1 | — | part |
| 5.2 | Neodymium Magnet | neodymium-magnet | 1× | 1 | — | part |
| 5.3 | Torque / Power Sensor 4 parts | sbt-torque-sensor | 1× | 1 | 30 | assembly |
| 5.3.1 | Strain Gauge | sbt-strain-gauge | 4× | 4 | — | part |
| 5.3.2 | Bare PCB | pcb-bare | 1× | 1 | — | part |
| 5.3.3 | Analog Front-End IC | afe-ic | 1× | 1 | — | part |
| 5.3.4 | SMD Passive (R/C/L) | smd-passives | 24× | 24 | — | part |
| 5.4 | Cadence Sensor 2 parts | sbt-cadence-sensor | 1× | 1 | 2 | assembly |
| 5.4.1 | Hall Sensor | hall-sensor | 1× | 1 | — | part |
| 5.4.2 | Neodymium Magnet | neodymium-magnet | 1× | 1 | — | part |
| 6 | Connectivity Module 4 parts | sbt-connectivity-module | 1× | 1 | 33 | assembly |
| 6.1 | Bare PCB | pcb-bare | 1× | 1 | — | part |
| 6.2 | ANT+/BLE Radio SoC | sbt-rf-soc | 1× | 1 | — | part |
| 6.3 | 2.4 GHz Antenna | sbt-antenna | 1× | 1 | — | part |
| 6.4 | SMD Passive (R/C/L) | smd-passives | 30× | 30 | — | part |
| 7 | Axle Adapter Kit 3 parts | sbt-axle-adapter-kit | 1× | 1 | 7 | assembly |
| 7.1 | Quick-Release Skewer | sbt-quick-release | 1× | 1 | — | part |
| 7.2 | Thru-Axle Adapter | sbt-thru-axle-adapter | 4× | 4 | — | part |
| 7.3 | Dropout Endcap | sbt-endcap | 2× | 2 | — | part |
| 8 | Power Supply | power-supply | 1× | 1 | — | part |
| 9 | AC Power Cord | sbt-power-cord | 1× | 1 | — | part |
| 10 | Connector | connector | 1× | 1 | — | part |
| 11 | Wire Bundle | wire-bundle | 1× | 1 | — | part |
| 12 | Carry Handle | sbt-carry-handle | 1× | 1 | — | part |
| 13 | Fastener Set | fastener-set | 1× | 1 | — | part |
Sourcing — likely vendors
Companies that make this · indicative price $200–$12k · MOQ & lead are typical| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| 🇹🇼Giant giant-bicycles.com ↗ | Taichung, TW | Bicycles | 500 units | 6–12 wks |
| 🇺🇸Trek trekbikes.com ↗ | Waterloo, US | Bicycles | 500 units | 6–12 wks |
| specialized.com ↗ | Morgan Hill, US | Bicycles | 500 units | 6–12 wks |
| 🇹🇼Merida merida-bikes.com ↗ | Yuanlin, TW | Bicycles | 500 units | 6–12 wks |
| cannondale.com ↗ | Wilton, US | Bicycles | 500 units | 6–12 wks |