SunUp Eco has an easier way to let you generate power on your bike without having to replace your front hub. Their new Spin Up add-on dynamo attaches to almost any standard front hub, offering drag-free power that’ll work on any bike.

SunUp Eco SpinUp add-on dynamo adds on to any front hub to provide USB power while riding your bike

We saw SunUp’s original design in 2012, which was intended to fit on the rear wheel. The installation was similarly easy, but compatibility was more dependent on frame design. And it wouldn’t work with disc brake hubs, despite that being the time that many bikes were starting to make the transition away from rim brakes.

The new Spin Up universal dynamo moves to the front wheel, and sits on the non-drive side, so it doesn’t matter what type of brakes you’re running.

SunUp Eco SpinUp add-on dynamo adds on to any front hub to provide USB power while riding your bike

Small clips capture your spokes and bolt into the back of the unit, attaching it to the wheel and using its motion to drive the dynamo. It’s thin enough to fit inside most forks, and will fit on any hub with normal height flanges.

SunUp Eco shows how to add a dynamo to any front hub to create power while you ride your bike

The system uses a separate power storage unit, too, so it’ll keep powering your lights or charging your devices. And it regulates the output to provide a steady current that doesn’t fluctuate with your speed. Other specs in the image above.

Retail price is TBD, they’re relaunching the brand and their website as Spin Up rather than SunUp Eco, so look for more details soon.


    • Dinger on

      I thought the same thing when I read that, but the last photo shows it mounted to a disc front hub on the opposite side. Must be a typo, as the old rear version also mounted on the non-drive side.

      I’m interested to learn what the drag is compared to a decent front hub dynamo. Seems like its all-up weight will be a little heavier.

    • ascpgh on

      Still no clarification of that typo by April 2020. “Drive side” is the right, on the front wheel too, right?. Many have disc brakes (on the left), and the copy earlier in the story said: “And it wouldn’t work with disc brake hubs”.

      Bike Rumor didn’t clarify the stereotypically poorly written English language communication of their Taiwanese website, instructions or cryptic avoidance of clarifying photographic portrayal of this thing’s application.

      If they think their engineering and solution of the power generation problem is as good as they think their english language translation skills are, this thing should be avoided.

  1. Lyford on

    Truly “drag-free power” would be a world-changing engineering breakthrough.

    Perhaps “low-drag power” would be more accurate?

  2. Dolan Halbrook on

    I really hope this fulfills its promise. Dynamo lighting is fantastic, and it always amazes me more people don’t take advantage of it.

  3. Mark on

    It looks like it’s zip tied to the fork. Removing the wheel may be a bit complicated then.

    12 watt power according to the spec sheet, though only 5 watt electrical output. I guess the rest goes to the battery buffer. Still, much more power than a generator hub which is usually 3 watts.

  4. Tom in MN on

    It clearly is pictured on the drive side with a disc brake in the background.

    And “drag free power”????? If it generates 12W then there is at least 12W of drag.

  5. John Chicken Bones on

    I don’t want to lace a new wheel for the plus bike(s) we have, or when they go fat in the winter, or the S&S coupler frames, or the cross bikes, or the other damned bikes piling up around here.
    If these promises are accurate (but really- what promises are?) TAKE MY MONEY!!!


  6. Ralph Emerson on

    It kills me on these items manufactured abroad (assuming) that they get a translation done and then can’t get a native speaker to review it: “fits 99.9% bicycle”, “works in all kind of weather condition”

    It’s small stuff, but when I look at an engineered product like this I hope that they are avoiding shortcuts everywhere, and I have a hard time buying into something where I see shortcuts right on the box/spec sheet!

  7. Matthias on

    The last generation of these things could occasionally be seen in Germany in the 90s (German Wikipedia is the only one that has an article: I owned two of these over the years and can confirm the problems cited in Wikipedia: conversion efficiency is worse than for ant other type of dynamo, and durability isn’t great either. I’m sure the gear drive has improved over the years but I’m still skeptical of the whole idea. In the age before hub dynamos this was pretty much the only way to make a dynamo work in any weather, but today the only target group I can imagine wouldn’t be better served by a hub dynamo is the ones who want to occasionally refit their MTB for a nighttime adventure that wouldn’t work with battery lights.


COMMENT HERE: (For best results, log in through Wordpress or your social media account. Anonymous/fake email comments may be unapproved or deleted. ALL first-time commenter's posts are held for moderation. Check our Comment Policy for full details.)

This site uses Akismet to reduce spam. Learn how your comment data is processed.