Smooths the acceleration, according to wiki
A Derny is a motorized bicycle for motor-paced cycling events such as during six-day and Keirin racing, or motor-paced road races. It is driven by a 98cc Zurcher two-stroke engine and by being pedalled through a fixed gear, typically of 70 teeth on the front chainring and 11 on the sprocket on the back wheel. The combination allows for smooth acceleration and slowing, important when the rider taking pace is centimetres from the pacer's shielded back wheel. A coupling between the motor and the back wheel ensures the machine will not stop dead if the motor seizes. Top speed, with rider pedalling, is up to 50kph, depending on gearing.
Posted By: watfordcanary on August 7th 2012 at 18:18:56
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- Why does the old cunt on the motorbike pretend to be pedalling it (General Chat) - Old Man, Aug 7, 18:07:34
- Smooths the acceleration, according to wiki (General Chat) - watfordcanary, Aug 7, 18:18:56
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