They are a simplified version of the RD-L1, having 3 fingers on each hand instead of 5, being smaller and having different metal appendages on their body, their head is also different, having two visible eyes instead of the Accelerons' symbol on the forehead' the visor is also more complex but less "sharp" then the one used by RD-L1.
Their chest has two rectangular horizontal lime lights and, like most of the other Racing Drones, their abdomen is composed of luminescent green wires. Their shoulders and forearms have the same metal appendages as the RD-L1 and they are around 7-9 feet tall
They are also quite more useless, being easily tricked by the other teams throughout the franchise, with thousands of those being easily destroyed by their own stupidity.
- They, although stronger than the RD-W1 and MD-01, are extremely inferior to the RD-L1, with RD-L1 having the power to destroy cars and kill humans easily, while the RD-S1 being able to be taken down by punches and kicks from the humans.
- They are also quite dumb and suicidal compared to Gelorum, RD-L1 and RD-Kadeem, with one of them being accidentaly lured by Vert into the Acceledrome and having it's entire lower half ripped off after crossing the Wheel of Power. However, they are said to be build and programmed to take out drivers and make sure RD-L1 makes it to the end of the race, winning the Accelecharger of the Realm they are racing in, even if it means killing theirselves in the process.