7/9/2018
Slinger Super Speedway
Zach Riddle tops Prelude to the Nationals at Slinger
![Zach Riddle tops Prelude to the Nationals at Slinger](https://dy5vgx5yyjho5.cloudfront.net/images/v2/s1136x640-O5e2xFiK6P7cx306415.jpg)
Slinger, Wis., July 8— Zack Riddle took the lead just past the halfway point and held off Shaun Scheel to win the 50-lap late model Prelude to the Nationals main event Sunday night at the Slinger Sup...