Hi Red Rebel,
Strictly speaking this forum is for Hornby Scalextric products only. I know "Scalextric" is analogous to slot cars in many countries so it it is not uncommon for people to come here asking about other non-Hornby products (it doesn't help that the name Scalextric is used by a different company in some countries...)
Still, you are not breaking the rules as you are not promoting another product and your question is of a general nature.
See the last two tips about tire maintenance and chassis prep here. This applies to any brand of slot car.
Many users also replace the rear tires with after market brands that are made of polyurethane or even silicone.
That is usually the best thing to get fishtailing under control.
Another tip is to use super glue or black paint to reduce friction on the front tires.