TQ Group. A German company that sounds like it should be making industrial robots or quantum computers. Spoiler: they kind of do both, but they also make the lightest, most technologically unhinged e-bike motor on the market. The HPR50 weighs 1.85 kilograms. That is not a typo. That is just German engineering showing off.
Founded in 1994 in Seefeld, Bavaria, TQ Group spent decades making embedded systems and automation technology for industries that don’t tolerate failure — aerospace, medical, automotive. Then they looked at e-bike motors and thought: “We can do better than this.” They were right.
Company Profile
| Founded | 1994 (making serious tech since before it was cool) |
| Headquarters | Seefeld, Germany (Bavarian Alps — inspiration for precision) |
| Core Business | Embedded systems, automation, aerospace, medical (and bikes, apparently) |
| E-Bike Product | HPR50 mid-drive motor (the showstopper) |
| Motor Weight | 1.85 kg (lightest mid-drive. Period.) |
| Torque | 50 Nm (plenty for everything except ego contests) |
| Key Tech | Harmonic Pin Ring Gear (sounds made up, is not) |
| Belt Compatible | Absolutely (what else would you use?) |
The HPR50: Harmonic Pin Ring Gear
TQ didn’t just build a motor — they invented a new type of gearing. The Harmonic Pin Ring (HPR) gear is based on principles from industrial robotics, where precision and efficiency matter more than marketing buzzwords.
Here’s what makes it special:
- Incredible power density — 50 Nm of torque from a motor that weighs less than a water bottle.
- 97% efficiency — Almost no energy wasted as heat or noise. Your battery lasts longer.
- Near-silent operation — The HPR gear doesn’t whine like traditional planetary gears. It just… works.
- Natural pedal feel — Responds to your input so naturally you forget there’s a motor.
When aerospace engineers decide to make a bike motor, this is what you get. Over-engineered? Maybe. Incredible? Absolutely.
Markets & Distribution
TQ motors appear in premium bikes from brands that don’t compromise. You’ll find the HPR50 in:
- Specialized — Turbo Creo SL, Turbo Vado SL. The lightweight legends.
- Canyon — Commuter:ON, Endurace:ON. German bike, German motor.
- Trek — Select Domane+ models.
- Rose — Backroad and Reveal e-bikes.
TQ is OEM-only — you buy bikes with TQ inside, not the motor separately. These are €5,000+ machines where every gram and every watt matters.
Why TQ + Belt Drive?
TQ motors are built for enthusiasts who obsess over details. Those same enthusiasts don’t want chain maintenance ruining their €8,000 e-bike experience.
Silence multiplied: The HPR50 is already whisper-quiet. Add a belt drive and the entire drivetrain becomes nearly inaudible. You hear the wind, not the machine.
Weight matching: If you chose a TQ motor to save weight, you care about every gram. Belt drives are lighter than equivalent chain setups over time (no heavy steel chains stretching and needing replacement).
Maintenance philosophy: TQ motors require essentially zero maintenance. Why would you pair that with a drivetrain that needs constant fiddling? Belt + TQ = ride and forget.
Putting a chain on a TQ-powered bike is like putting regular gas in a Ferrari. Technically possible. Philosophically wrong. Your bike deserves better.
Where to Buy
TQ motors come inside bikes from Specialized, Canyon, Trek, Rose, and other premium manufacturers. Look for “HPR50” or “TQ” in the specs. Official info: tq-group.com/ebike
In Our Catalog
Browse all belt-drive bikes with TQ motors: [View TQ Bikes]