Marshal a person responsible for signaling track conditions to drivers through use of flags extinguishing fires removing damaged cars from the track and sometimes providing emergency first aid.
Marbles racing tires.
And while the off track care and use of tires leading up to this is really important what the driver does in the cockpit with the controls on the track is still the most important element.
Racing tires are designed to wear.
But the type of tires f1 requires just produce a whole lot more deposition and take up of rubber.
There s an example of where rubber on the racetrack does not improve grip.
This is not always true.
Goodyear racing eagles like all racing tires are made from a rubber compound containing elastomers elastic polymers that can stretch and return to their original shape source.
Britannica other components that go into a tire include fillers and rubber attaching agents.
If a driver enters the marbles at an excessive speed his car will lose grip and drive perilously into awaiting hazards as if a person walked across a bed of marbles.
It s impossible for tire companies or race teams to run controlled tests and definitively say that grinding siping or grooving tires in a specific pattern or to a specific depth gives specific amounts of additional traction heating cooling.
The cars push the marbles out of the racing line but heaven forbid you get a little out of sorts and get off the clean track.
To understand how marbles are formed let s look at the science behind racing tires.
Grooveless tires in auto racing melt and pieces become known as marbles.
Marbles pieces of rubber from tires that accumulate on the racing surface outside of the racing line that are slippery like toy marbles.
If you want to try running a different line on the track it will take a little bit of work to clean the marbles from that line.
The marbles on the track will also affect the grip your tires have with the road surface.
A well used tire that is wearing evenly will show uniform abrasion across the entire contact patch.
Some tracks act like a grinder or cheese grader on the contact patch of the tire causing the tire to wear faster.
The best kind of racing tire because they ve had a few laps of wear to normalize the surface.
Rocks and debris that collect off the racing line.
Softer compound tires are better for a lighter weight vehicle while a harder compound tire is better on heavier vehicles.
Since drag racing tires have a softer compound than typical street tires you would think that softer is better.
And you are going to notice your car is losing traction when you do.
The tires used for both nascar and iroc style racing are completely different from the standard road tires on passenger cars.
Racing tires come in many different hardness compounds.
In order to provide maximum grip between the tires and the track manufacturers create wide grooveless racing tires called slicks.
