Much like their new Euro style brake rotors these YZ style rotors are made of steel and vented in a very specific pattern. Yamaha’s Brembo brakes are among the best on the starting gate and now Pro-Line is bringing that same look and level of performance to the 1/4 Losi Pro-Moto MX/SM bikes. These rotors pair well with PL’s aluminum calipers (sold separately) and are a direct bolt on item.
Item #PRO642100 https://www.prolineracing.com/product/1-4-yz-style-steel-f-r-brake-rotor-set-promoto-mx-sm/PRO642100.html