Drivetrain

You've decided which Co-Motion is right for you, but did you know we're also an industry leader in drivetrain options? We've partnered with many component manufacturers over the years to develop and offer cutting edge technology to our customers. Take a look the drivetrain options below to learn more about their intended uses, benefits, and integration with your custom Co-Motion.


SRAM 2x10-speed

Double ring mountain crankset with 10-speed mountain cassette and chain drive. The SRAM 2x10 gearing is focused on the low end for off-road travel and loaded touring. This option offers a 491% gear range. On the Divide 29er model with 2.0" tires, the range would be 22.5" low with 110.5" high gear.

Derailleur drivetrains are lightweight, smooth operating, and very efficient.


SHIMANO 2x11-speed

Double ring crankset with 11-speed cassette and chain drive. Available in Shimano 105, Ultegra, and Ultegra Di2 as standard options on most bike models.

Shimano is a leader in shifting technology and the latest 11 speed components do not disappoint. The electronic Di2 option is a game changing upgrade and well worth considering on a road or gravel bike.


Rohloff 14-speed

The German Speedhub is the most reliable, widest range internal gear hub on the market. The range is impressive too at 524% total range with even steps in between gears. It's a perfect match with the Gates Carbon Drive belt for the least maintenance and grease-free bliss. On the Siskiyou 650b model with 48mm tires the range would be 19.2" low with 100.1" high gear.

On Rohloff equipped models we have designed and integrated specific dropouts to ease wheel installation and removal without the need for re tensioning of the belt drive during wheel changes. And our Co-Motion eccentric offers secure tension during setup and throughout the life of the bike. Oil changes are easily performed at home or on the trail, recommended service interval is once a year or every 5,000km (3,100 miles) whichever comes first. Rohloff guarantees a flawless and technical fault-free running of the Speedhub for a period of 2 years after the date of purchase.


Pinion 12-speed

The Pinion gearbox is a revolutionary new bicycle transmission from Germany. Similar to the Rohloff Speedhub, the gears are sealed from the elements in an oil bath and offers low maintenance with ability to run a Gates Carbon Belt drive. The Pinion mounts in a custom frame bracket in the center of the bike, connected to the crank spindle which provides excellent handling and a well balanced feel. The C1.12 gearbox is made of magnesium, so it's lightweight but has an incredible 600% total range with even steps in between gears. Perfect for lighter duty road and gravel bikes. On the Klatch 700c model with 37mm tires, the range would be 17.6" low with 105.7" high gear.

Stainless steel Co-Motion designed thru-axle sliding dropouts keep the belt drive secure under tension and makes setup a breeze. This setup also eases installation and removal of the rear wheel without need for re tensioning of the belt each time the wheel is changed. Oil changes are a breeze with our Pinion Oil Kit and recommended every year or every 10,000km (6,200 miles) whichever comes first. The Pinion C-series gearbox is covered under warranty for a period of 2 years after date of purchase.


Pinion 18-speed

The Pinion P1.18 gearbox is equally impressive as the C1.12 and has an industry leading 636% overall gear range. This stout gearbox is cnc-machined from aircraft quality aluminum and rated for expedition touring and heavy mountain use. And just like the lighter 12 speed version, it mounts down low and centered on the bike for great handling. On the Americano 700c model with 37m tires, the range would be 17.6" low with 105.7" high gear.

Stainless steel Co-Motion designed thru-axle sliding dropouts keep the belt drive secure under tension and makes setup a breeze. This setup also eases installation and removal of the rear wheel without need for re tensioning of the belt each time the wheel is changed. Oil changes are a breeze with our Pinion Oil Kit and recommended every year or every 10,000km (6,200 miles) whichever comes first. The Pinion P-series gearbox is covered under warranty for a period of 5 years after date of purchase.


Gear Inches

Descriptions and examples above refer to gear inches for comparison purposes. Gear inches refers to the effective equivalent wheel diameter per pedal stroke.

For example, if you're pedaling a Divide 29er with 50mm (2.0") tires and a Pinion P1.18 gearbox in the first gear, each full rotation of the crank will produce the equivalent of one revolution of a 17.8" diameter wheel. The eighteenth gear will produce the equivalent rotation of a 111.7" diameter wheel.


Gates Carbon Belt Drive

The Carbon Drive has revolutionized how we sync cranksets on tandem bikes and transfer power from the cranks to the rear wheel. They save weight, reduce maintenance, and best of all last longer than a traditional chain drive.

CDX - Is the latest technology and iteration of carbon belts from Gates Corp. They incorporate a center tracking design in both the rings and belt to ensure alignment. This feature when tensioned properly eliminates any lateral movement, making it virtually impossible to derail. Estimated mileage on a CDX belt is 9,000 miles although we've seen timing belts on tandems go up to 14,000 miles regularly.

Tandem - We've incorporated the tandem timing belt since its launch back in 2009 and it's been a successful upgrade on many tandem models ever since. These are now available in two configurations in the latest CDX format; original 130mm bcd 5-bolt with 66/69/74 tooth rings, and newest 104mm bcd 4-bolt pattern with 39/42/46 tooth rings. Please see the FAQ section for more information on compatibility and installation.

Touring - Carbon belts are great for touring application when paired with a Rohloff hub or Pinion gearbox, for all the obvious reasons. All of these components are low maintenance, durable and reliable. Plus you can easily carry a spare when in doubt as they coil up small and weigh about the same as a candy bar. Each Co-Motion bike designed for integration with the Rohloff or Pinion has the ability to use a Gates carbon belt drive. Chain-stay length and drive ratios have been calculated and optimized based on available belt/ ring combos, each models' intended use and its tire size range. In some cases the drive ratios and gear ranges can be changed depending on available belt/ sprocket combinations and minimum ratios per manufacturer's specs.



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