R.O.A.R (Remotely Operated Auto Racing) is a non-profit organization that sanctions RC racing events in the US and Canada. Their guidelines are used to maintain consistent specifications at all RC clubs. These specifications include including: track width, body size, tire compounds, battery size, motor guidelines, and others.
In this post we are going to focus on the motor guidelines, and recommend a R.O.A.R legal "stock spec" motor for your SC10.
Most R.O.A.R. sanctioned, Short Course, Stock Spec races allow 17.5 Turn Brushless motors. Other specifications that must be met include motor size, armature length, magnet type, and more. The good news is that you don't have to filter through the complicated rules and specifications.
Here are a couple quality, R.O.A.R. approved 17.5T and 21.5T Stock Spec motors that you can use in your next R.O.A.R. sanctioned Stock Class event...
For list of all approved brushless motors, including 21.5T stock spec and 13.5T modified, see the R.O.A.R. Approved Bruhsless Motors list.
To see a list of other R.O.A.R. approved parts, including batteries and bodies, see the R.O.A.R. Approvals Page.