Cyclingnews recently spotted several teams using electric power tools to help change disc brake wheels as fast as possible. Formula 1 teams use bigger pneumatic air guns when changing wheels, while cycling uses smaller electric power tools.
However, the concept and goal are the same: unscrewing and then screwing in the wheel as quickly as possible.
The power tool has torque levels preset to ensure the thru-axle is secureStephen Farrand/Immediate Media
Neri Sottoli told Cyclingnews it will also use power tools when it returns to Europe after a manual rear disc-wheel change on stage 2 took almost 30 seconds.
Klas Johansson, head mechanic at Dimension Data, gave Cyclingnews a demonstration of how he uses a small Metabo Powermaxx power tool. It is set for a torque of 11Nm and unscrews and tightens the thru-axle in a couple of seconds, much quicker than doing it by hand with a hex key.
The power tools are compact enough to hold in one hand, as well as a set of wheelsStephen Farrand/Immediate Media
Johansson got to test his disc-wheel changing skills on the final stage of the Vuelta a San Juan. Mark Cavendish suffered a rear puncture 20km from the end of the stage and Johansson was able to give him a rapid wheel change so he could quickly catch the peloton and contest the sprint.
Riders often choose to change bikes rather than wheels when time is tight, but usually only the team leader’s bike can be taken off the rack quickly because it is located on the outside of the roof rack on team cars.
Quick release skewers are still used to secure wheels on team carsStephen Farrand/Immediate Media
Johansson explained that a normal wheel change takes about the time seven team cars go past in the race convoy (approx 10 seconds), while the rear disc-wheel change took about 14 cars (approx 20 seconds).
He suggested that with the power tool, a rear disc-wheel change takes 10 seconds longer than a rim-brake wheel fitted with a quick-release lever, and so about 20 seconds in total. The extra time is needed to carefully align the disc between the pads as well as the smallest sprocket with the chain.
When Johansson hears over the radio that one of his riders has punctured, he now grabs his power tool as well as a set of wheels. He is happy to do so as long as it helps speed up wheel changes and keeps his riders happy and in the race.
The use of the thru-axles means the quick release skewer is no longer needed, making for cleaner looking and stiffer dropout areas, as well as the benefits of disc brakes. Teams now only use quick-release skewers to hold the disc wheels on the bike rack on the team car.