Shutter Precision introduces 150 mm dynamo hub for fat bikes

Fat bikes love winter. Battery-powered lights do not. The cold can suck the juice out of a battery much faster than in the summer, but dynamo hubs can power your lights or electronics all day and night. Trouble is, there weren’t many options for fat bike hubs with dynamos, especially since the spacing kept changing.


Now Shutter Precision has unveiled its new fat bike version of the SP-8X spaced at 150 mm with a thru-axle that will fit on most new fat bikes, including on the RockShox Bluto suspension fork. Shutter Precision specially engineered the hub to get full power from the slower rotational speeds created by the big tires.


The hubs should go on sale in January, though retail pricing has not yet been set.


Bike2Power releases hub-mounted dynamo USB charger


If this thing works as advertised it could get a lot of people pretty charged up. (Sorry, that was some dynamo humor.)

Anyway, Bike2Power has released a hub-mounted dynamo that can be used on nearly any existing bike, has a built-in light, and can charge USB devices. Unlike some similar devices that require a dedicated dynamo hub, the BikeCharge Dynamo can be installed on almost any front or rear wheel and the lights can be set to high, low or blinking modes.


By cacheing the power in a 1,100 mAh battery pack, it can charge devices like smartphones, which are notoriously picky about power draw. The battery means it will continue to power your device even when the bike is stopped, such as at a red light, without interruption.

I predict these types of devices are going to be big in the next few years as more touring and city cyclists want to bring their gadgets with them. I’m also intrigued because it will fit on fat bikes with extra-wide front hubs


At $119 it’s a lot less expensive than a dynamo wheel, and can be switched from bike to bike. The best part is that if it doesn’t fit your bike, they will even take it back for a full refund within 30 days.

We’re going to try and get our hands on one to review, so stay tuned.


An earlier version of this story stated that there are no dynamo hubs available to fit fat bikes. However, the Son 28 135 is in fact available to fit fat bike forks with “rear” rotor spacing.


Review: Biologic Joule Dynamo Hub and Trelock Lights

Lighting is a crucial element for bicycle safety. While there are plenty of battery-powered lights on the market, they only last for so long before the batteries need to be replaced or recharged—plus you have to remember to bring the light with you! Dynamo hubs offer endless electricity, powered by your pedals. The only trade-off is that the small amount of rolling resistance you get while generating that electricity can be, well, a drag. A new hub from Biologic has a way to get around all that.


Read our review of the hub and lights here.

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