Test 2015: Tomahawk IC7 ergometer - Tomahawk IC7 spinning ergometer in a practical test

The two-stage belt drive in the stylishly clad interior runs quietly and conveys a realistic pedalling feel - also thanks to the small crank distance of 155 millimetres compared to typical ergometers. At a pedalling frequency of 100, the system requires an output of around 44 watts even with resistance in the zero position. The permanently installed bike computer provides constant feedback on performance (with maximum and average values). It also displays the braking power from 0 to 100 per cent - according to the manufacturer, this is reproducible on all IC7 devices. It also displays: the (theoretical) speed, heart rate (only with an analogue Polar heart rate belt, not supplied) and the level of exertion using a five-stage colour system - from "active recovery" (white) to "neuromuscular performance" (red). It is calculated from entered user data or a ramp test in which the rider has to control their own performance, for which the computer sets target values. This is because, for reasons of user safety, the electronics must not affect the resistance when the drive is fixed. Control via an external app for smartphones is planned. The data cannot yet be exported, but can be viewed as a summary at the end of the training session.

The user can adjust the resistance of the magnetic brake by hand using a rotary screw; it reacts directly and without delay so that short intervals can also be ridden. If you increase the cadence with the same resistance, it feels a bit like starting off on a racing bike. The handlebars and saddle are infinitely adjustable - riders between 1.50 and 2.10 metres tall will find a suitable saddle and handlebar height, while the seat angle can be set at 70 to 80 degrees. However, it is not possible to find exactly the same position as on a road bike, as the bottom bracket is slightly further forward than on a road bike, partly due to the measuring technology - as is usually the case with studio spinning bikes.

PLUS Only bike with rigid drive and watt measurement; intuitive operation; validated measurement technology; quiet and low-maintenance

MINUS Less flywheel mass than spinning bikes; no actively controlled programmes; unusual seat geometry

Price 2499 Euro
Reference/Info www.indoorcycling-shop.de