Dunlop K860 70/100-17 Mini Dirt Track Tyre
Buy now, pay later
The Dunlop K860 is a mini size purpose built Dirt Track tyre. These tyres are cheap enough so you can give dirt track/speedway riding a try and see if you like it.
With the K460 16 inch rear a matching front would be a normal knobby. At most Dirt Track events you are allowed to use knobby front tyres, a soft terrain type is the best option.