Together with the R101 ( sensor ) and R102 ( bracket ) this is the last hardware part of the Formula Renault wheelspeed setup.
Early versions were 2 piece. This one is a single piece of stainless steel. Mounts in the centre of the wheel spindle.
Many teams choose to run only oen wheelspeed to cut costs. This is a big mistake. The FR2000 is a proper race car with downforce and the braking is a crucial area to create a good lap time. Just ask the first UK FR2000 champion in the year 2000, Kimi Rakkonien. Many couldn't understand where the laid back Finn was making up the time. Manor Motorsport could see it on the data logging and consistently worked on all their drivers every year from 2000 to get the most out of the braking area. And how do you know when a driver locks a wheel ? - because se he won't tell you and often doesn't even know, - from the data. So if you run one wheelspeed sensor on the predominantly loaded wheel you will rarely see a lock up.
Brakes - its all in the brakes - another good reason to run dual brake pressure sensors on a race car. Also available on this web shop.