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Schlumpf Speed Drive - pitch circle 130

High Speed Drive BCD 130
Now New. Following the successful relaunch of the High Speed Drive, the adapter BCD 130 is now also available in the new design. Done in a nice design of one  piece of solid aluminum.

Available now


Schlumpf Mountain Drive for folding bikes - f.e. Version Brompton

With the Schlumpf mountain drive you gain additional very low gears which enable you go climb the most extreme inclines easily. The extremely flat planetary gearbox reduces every gear by factor 2.5, that way doubling the expansion extent of your bike.


. direct gear 1:1 and hill reduction 2.5:1

. no frame manipulation necessary, fixed with a torque arm between chainstay and seat tube

. for BSA standard bottom bracked tube (68mm widht)

. crank length 170mm straight , choose black or silver

. shifting by a simple kick on the shifting button with your heel


example : BWR 6 speed, 50 teeth chain ring, 15 and 13 teeth rear sprockets (standard ratio Brompton)

the diagram shows the additional ratios (green  bars) when mountain drive is engaged

grey bars are standard ratio BWR 6 

development     =  meter per one crank turn

total development is 669%

Manufactured in Germany


Dear business partners and customers,

Here are the latest news on High-Speed Drive.

Three weeks ago, we introduced the first innovation of the year 2017: the pitch circle 130 for Speed-Drive. And now we are pleased to present the fully revised

High Speed Drive product line

which sets new standards in design and function. The High Speed Drive impresses with a gear ratio of 2.5 – the ideal solution for fast e-bikes.   

The trouser guards and the chainring are now made from one solid piece. The result: an easy-to-deploy tool that is also visually appealing. Toothed adapter, trouser guards, chainring and clamping device – these four parts will now be replaced by one single component machined from solid 7075 aluminium. Discover the optically and technically enhanced High Speed Drive with its entire range of 27-tooth, 30-tooth and 34-tooth sprockets (available from March 2017). Larger chainrings continue to be part of the adapter solution LK 130.



newsletter 01 / 2017:

Schlumpf Speed Drive - pitch circle 130

Dear business partners and customers,

We wish you a good start to a successful 2017! Just in time for the new season, we have added pitch circle 130 to our Schlumpf Speed Drive product range. This means you no longer need an adapter to switch from pitch circle 110 to 130. Simply specify the pitch circle of your choice in your order and you will be provided with the desired size. The product is available now. The picture below shows the two sizes currently available. Please select the desired size when placing your order.


Bultaco Brinco – Rock your Day

Thanks to more powerful battery packs and high-performance drives which have become even more efficient, the e-bike market is once again gaining momentum. With Brinco, the Spanish manufacturer Bultaco offers a totally new and surprising combination in the world of motorcycles and bicycles. Half motorcycle, half bicycle and designed like a motocross, it perfectly combines the benefits of both systems. The new model weighs 40 kg only and is equipped with a Schlumpf gearing system (High Speed or Speed Drive). So you can experience all of the fun of biking on rough terrain and roads. We are pleased to welcome Bultaco as our new customer and wish them every success.

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the company stromer ag is using for the relaunch of limited edition st 1 the speed drive system by schlumpf.


The ST1 S, in a sporty green finish, is available with a 17 or 20-inch sport frame and benefits fully from the ride comfort of the 18-gear Speed Drive System by Schlumpf delivering an even more sporty ride. The ST1 S is fitted with Continental Top Contact II tires that make the Stromer even more efficient and agile thanks to their very light weight and lower rolling resistance. Other ingredients for a sporty riding style are the hydraulic Tektro Dorado disk brakes and Supernova E3 headlight, which makes sure you can always see and be seen perfectly clearly. The special Stromer sport saddle completes the sporty specification of the ST1 S.


the fast ST1 S (green)



The ST1 T with stylish brown finish is available with a 17 or 20-inch sport frame. Equipped with the ingenious Schlumpf Speed Drive System, it delivers a very special riding experience. A quick kick with the heel, whether at a standstill or while on the move, is sufficient for the gear unit to change the entire ratio. The Schwalbe BigBen tires specially developed for Stromer guarantee the ST1 T a more stable riding feel, combined with ideal shock absorption. To ensure you can always come safely and swiftly to a standstill even from higher speeds, the ST1 T is fitted with hydraulic Tektro Dorado disk brakes. For optimum visibility, it has the sturdy and powerful Supernova E3 headlight


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