Doppio BB Gearbox
100442
Pairs well with
- In stock, ready to ship
Kappstein Doppio: The Ultimate 2-Speed Bottom Bracket Gearbox
Revolutionize your ride with the Kappstein Doppio, a cutting-edge 2-speed bottom bracket gearbox that delivers seamless shifting, compact design, and versatile performance. Engineered in Germany, the Doppio is a lightweight, durable, and innovative solution for urban commuters, e-bike enthusiasts, city riders, and trekking adventurers. Whether you’re navigating bustling streets or exploring new paths, the Doppio offers the perfect blend of efficiency, style, and adaptability.
Compact Powerhouse
Very compact and only 200g heavier than a standard bottom bracket, the Doppio redefines compact engineering. Its 2-speed gearbox provides a 1:1 ratio in first gear and a 1.57 ratio in the heavier second gear, expanding your gear range without compromising your bike’s sleek profile. Compatible with any BSA/BSC bottom bracket (68/73mm), the Doppio integrates effortlessly into most frames using a patented bolting system, requiring no frame modifications for installation. This makes it an ideal upgrade for urban bikes, e-bikes, or even folding bikes where space and aesthetics are paramount.
The Doppio shines in urban and city environments, offering smooth gear transitions for tackling varied terrain. It’s also a game-changer for e-bikes with rear motors, enhancing efficiency, and can be paired with hub gear systems for expanded versatility. For those seeking simplicity, the single-speed Doppio mode uses the 1.57 ratio, equivalent to a 50T chainring with a 32T setup, perfect for riders who need a heavier gear without oversized chainrings—ideal for compact or folding bikes.
Intuitive and Elegant Design
Shifting is effortless with a Bowden cable controlled by a discreet Kappstein 2-speed shifter, designed to blend seamlessly into your handlebar setup for a clean, minimalist look. An innovative clamping mechanism secures the cable to the gearbox, ensuring reliable performance. The Doppio’s gearbox delivers a smooth, precise power transfer, while the Kappstein JIS square crank (175mm) and 32T chainring provide a robust, efficient drivetrain. With a chainline of 43.5mm and a Q-factor of 185mm, the Doppio ensures optimal pedaling dynamics.
Single-Speed Doppio: Sleek and Purposeful
For riders who prefer simplicity, the single-speed Doppio mode eliminates the need for shifters, cables, or switching devices, utilizing only the 1.57 gear ratio. This configuration is perfect for bikes with limited clearance for large chainrings, such as folding or compact frames, offering a heavier gear in a sleek, weight-saving package. It’s a stylish, space-efficient solution for urban riders or specialty bikes, maintaining the Doppio’s signature German craftsmanship and aesthetic appeal.
Why Choose the Kappstein Doppio?
- Ultra-Compact Design: Only about 200g heavier than standard bottom brackets.
- Versatile Compatibility: Fits BSA/BSC 68/73mm frames with no modifications needed.
- Smooth Shifting: 2-speed gearbox with 1:1 and 1:1.57 ratios, controlled by a discreet Bowden cable shifter.
- Single-Speed Option: Heavier gear ratio without oversized chainrings, ideal for compact or folding bikes.
- German Engineering: 100% crafted with precision, featuring 6 CNC-shaped planetary gears.
- Multi-Application: Perfect for urban, city, e-bike, and trekking, with chain or belt drivetrain compatibility.
Specifications:
- Number of Gears: 2 (or single-speed mode)
- Gear Ratios: 1:1, 1:1.57
- Drivetrain: Chain or belt
- Chainline: 43.5mm
- Q-Factor: 185mm
- Bolt Circle Diameter: 4 x 104mm
- Weight: 1250g (complete set)
- Crank: Kappstein JIS square, 175mm
- Chainring: Kappstein 32T
- Bottom Bracket Mounting: BSA/BSC (68/73mm)
- Shifting Operation: Bowden cable with Kappstein 2-speed shifter
- Gears: 6 CNC-shaped planetary gears
- Material: High-quality steel and aluminum components
- Application: Urban, e-bike, city, trekking
- Origin: 100% Made in Germany
Easy Purchase Options
The Doppio is now available in our online shop, complete with a detailed manual/installation guide in the download area to ensure a smooth setup. Choose the purchasing option that suits you best:
- Direct Purchase: Order directly from our online shop for convenience and fast delivery.
- Indirect Purchase: Connect your local dealer or bicycle workshop with Kappstein, and we’ll handle the rest. Contact us via email to inquire about authorized dealers in your area.
Before buying, consider whether a direct purchase or working through a trusted dealer is the best fit for your needs. Our team is here to support you every step of the way.
Manufacturer:
Südstraße 15, Gebäude 14
99867 Gotha
Germany
info@kappstein.de
