SCHLUMPF MOUNTAIN/HIGH/SPEED-DRIVE 2:SPEED GEARBOX CHAIN.SET

An ultra-thin (10mm) planetary gearbox that sits inside the chainring, with no bulky casing, extra cables or derailleurs. Change gear with a tap of your heel, and enjoy a low-maintenance, high-efficiency drivetrain built to last.

Gearbox

• Change gear with a heel tap on the side buttons, whether standing still or under heavy load.
• There are no cables, levers or derailleurs.
• It's low maintenance, with high efficiency and high-quality materials for a long service life.
• A symmetrical clutch takes full torque in both pedalling directions, so it works with coaster brakes and fixed-gear bikes without a rear brake.

Choose your drive

• Speed-Drive: 1x direct drive and 1.65x overdrive.
• High-Speed-Drive: 1x direct drive and 2.50x overdrive.
• Mountain-Drive: 1x direct drive and 0.40x reduction for the steepest climbs.

Fit and compatibility

• It's also compatible with most popular folding bikes.
• The chainring is not included.

Options

• Easy-Shift plates are available on request; they cover the crank arms for a larger push area, which is best for clip-in pedals.

Ordering

• The lead time is 2–4 weeks from purchase.
• Sales outside the UK may incur local duties. A shipping option with EU duties included is available at checkout for higher-value items.