Answers to the questions we get about the revolutionary drivetrain
Why is there not a both rideable and shiftable version?
The goal was to have a rideable and a shiftable version to show September 4th, at the opening of this year's EuroBike show. And we have. We consider it a formality to combine both.
Why is there a cover on the Venge?
It's a safety/contamination cover, which just happens to make the bike additionally aero efficient beyond the naked Driven set up.
Is it fragile?
The three Driven drivetrains we're showing today look fragile, and they are! The bikes are not designed to carry significant rider loads. The parts are thinner and many 3D printed. But, these are just "show-bikes". We have a version that was ridden at a velodrome, able to hit 45kph. Find the video of that, at the bottom of this page.
Driven at the Velodrome
Can the rideable version handle the full torque of a rider?
Not presently. The first goal was to hit 200-250 watts output. That was achieved. The next step of higher output should not be difficult. But, our recent focus has been on shiftability and limited rider output.
Doesn't the bikes have a relatively large gap between the small rear gears?
Yes. Larger gaps exist at the small rings of the Driven rear cog than with a standard chain cassette. However, this large gap would be eliminated by the use of a close-ratio double front ring. For example, a close-ratio double front ring with 55T and 50T (10% difference) would effectively decrease the gap of the final gear ratios of the smaller rear cogs by +/- 10%.
How will you create a high load rideable version?
With stronger materials, strengthening of high stress areas, potentially different designs all together, ie. new rear hub design.
What is the limitations for power transfer?
Presently, 200-250 watts. Do we believe Driven can ever transfer enough power to become a real alternative to known drivetrains? We certainly and confidently believe Driven will be able to handle much higher loads. The only reason the rideable and shiftable version hasn't been built yet is due to time.
Why is the Venge cog smaller than others?
The Venge cog is actually a 12T-30T. This is comparable to an 11-28 standard cassette. We are not trying to cheat the aero test by using a smaller rear cog, we are - out of fairness for both Driven and a standard drivetrain, comparing equivalents.