All four levels of assist sense pedaling and add assist automatically.
The handlebar control allows you to toggle the assist level between one and four, turn on the display screen, and select information screens. There is a soft-button on switch on the battery case, and you start the system and activate the display with an on button that is part of the handlebar-mounted control unit. The battery case attaches to the frame tube where a bottle cage would normally reside. The brains of the outfit are all tucked in with the drive unit or in the battery case, so there is no external controller. The idea is the same: mount the assist unit in the middle of the chassis and allow it to use the derailleur and cassette to essentially give the drive unit a nine-speed transmission. The look is somewhat close, but this is not a Bosch drive. Most of the other e-bikes in the Currie Technologies Izip line have hub motors of one sort or another, but the Peak has a Currie-spec, 350-watt, TransX, mid-drive, high-torque assist unit with proprietary software. This is an e-bike tailor-made for climbing, so it is more than aptly named. In this case we were happy to find that the rest of the bike fully deserves an assist package this impressive.
When an e-bike is destined to spend its time on pavement, the advantages of a mid drive are not so pronounced, but the Peak is a mountain bike with plenty of dirt in its future, and the benefits in handling off-road make the mid drive a huge deal for a bike that retails for $2999. Dedicated mid-drive e-bikes are the absolute latest in production models.
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