Box Two Prime 9 X-Wide Single Shift E-Bike Groupset
Box Two-E 9S Drivetrain Bundle w/ Prime 9 Technology & Box Three Cassette
Box developed the Box Two-E system as an e-bike specific drivetrain to offer more robust high wattage strength and a better riding experience. With Box 9 speeds and X-wide range gearing means less shifting action and more efficiency for the motor. With the 42 and 50 tooth low gears, it’s possible to maintain optimum pedaling cadence while climbing steep hills. By enabling riders a higher pedaling cadence, the electric assist also operates more efficiently and is able to climb without bogging down the motor.
- E-Bike specific drivetrain designed to provide wide gear ratios with reduced shifting
- 454% differential between gear 1 and gear 9
- Easy to use Twin Lever Shifter actuation
- Low maintenance derailleur
- High durability cassette and chain
With the trend to 10, 11, 12 and now even 13 speed cassettes, the gears and chains are getting thinner and more fragile. With a mid-drive motor you need fewer gears but more strength in drive train components. This is something Box noticed and did something about. Depending on the mid-drive motor, you can be putting between two and over ten times the typical human power through the drive train. By taking a step back to 9 speeds, Box was able to beef up the drive-train to withstand these magnified ebike power levels.
You need this!
Although this is the perfect drive-train for electric mountain bikes it also can't be beat for street machines and hybrids. What electric bike with a mid-drive can't benefit from a beefy drive-train and super wide gearing. You probably gave up two of your front chainrings with your mid-drive conversion so now you not only have fewer gears but a much narrower range of gearing. This ultra-wide range cassette gives it all back.
If you bought an eMTB with an 11 or 12 speed drive-train or converted an 11 or 12 speed MTB with a mid-drive kit, you either already have or certainly will wear out or break a key drive-train component. You should seriously consider replacing your whole drive train with this. This is the perfect drive-train for a mid-drive motor ebike and with its lifetime warranty, you will never need to buy another one. All new drivetrains from Box Components include a Lifetime Warranty Against Breakage.
Like I said, "You need this!"
Tri-Pack limited slip clutch™ - an innovative chain damper that vastly reduces derailleur cage bounce and chain slap. The system also maintains tension for better chain wrap. At its core is a clutch pack, that is capable of providing a large amount of force in a small package.
Durable 3D Forged Linkages - Impact resistance is greatly improved by way of forging — a key manufacturing process that strengthens critical components. Tested at the premier freeride event of the season — Red Bull® Rampage — this new construction has proven itself capable of performing at the highest level.
Pivot-Tech - Impact resistant, spring-loaded cable stay keeps cable, housing & you out of harm’s way.
Speeds 9 Speed
Materials 6061-T6 Aluminum, Carbon Fiber/Nylon Composite
Pulleys Closed Bushings
Cage Size X-Wide
Maximum Cog 50T
Hardware Aluminum / Cr-Mo Alloy
Color/Finish Hard Onyx™
Weight 290 grams / 10.2 ounces
Technology Tri-Pack™ Limited Slip Clutch, Pivot Tech™
Extend your range, without emptying your wallet. Box Two™ Cassettes are a quick and easy upgrade for you electric mid-drive motor conversion. Ramped teeth and a gradual, linear progression help provide smoother transitions from gear to gear, while a massive 50 tooth cog extends range to a respectable 454 percent. Compatibility** with standard freehub bodies means this cassette is suitable for nearly any bike.
Hub Compatibility Shimano® HG
Speeds 9 speed
Material Steel & 7075-T6 Aluminum
Weight 650 grams (w/lock-ring)
With improved ergonomics and thumb & index finger controls, Box Two™ Twin Lever Shifters provide smooth and accurate transitions from gear to gear. One gear per shift improves e-bike drivetrain durability.
Speeds 9 Speed
Material Aluminum, Nylon Composite
Hardware Aluminum, Steel
Color/Finish Matte Onyx
Weight 122 grams / 4.3 ounces
All Box Two™ shifters include a stainless steel shift cable.