Practice preserving tire impressions and then match them to the bike that made the tracks.
You will need:
- Disposable plastic container
- Plaster of Paris
- Water
- Cup
- Bucket of water or outdoor facet
Have someone make a track by riding a bike over some soft dirt (but don't let them tell which bike they used)
Mix a small amount of plaster of paris with water according to the package directions
Using the cup gently pour the plaster over a 6-8 inch section of the bike track. **don't forget to cover the sides of the track.
Let the plaster dry completely.( this can take up to 60 minutes)
Pry up the plaster patch carefully, Rinse it in the bucket of water or under the faucet to remove excess dirt.
Compare your cast to the tread on everyone's bike and see if you can spot a match.
