Bosch ABS Control Unit – Tektro/Trp (BAS3321). The Bosch eBike ABS provides more safety stability and comfort during braking. Wheel speed sensors on both wheels can detect when the brakes lock and the braking force is automatically adjusted via software and control. This reduces the risk of being thrown over the handlebar on high-grip surfaces and of falling on slippery surfaces. In the event of extreme overbraking of the front wheel the intelligent Bosch eBike ABS rear wheel lift control reduces the possibility of unwanted lifting of your rear wheel. The likelihood of being ejected over the handlebar is reduced.