Mine aren't but if yours are there could be multiple reasons:
1. No or little tread on the tires
2. Wet street
3. Brakes applied hard on gravel or other low traction surface
4. The anti-lock brake system isn't working as it should. If this is the case you'd see the "Antilock" warning light on the dash.
Under normal circumstances an emergency stop should cause the anti-lock system to take control, releasing brakes at individual wheels as it senses the wheel is about to lock up (skid the tire).
If you suspect your brakes aren't working properly you should have them looked at by a qualified mechanic.
Cheers
Air pressure against the Bead keeps the tire from slipping on the wheel. Traction keeps it from slipping on a surface.
The rear tires except Subaru which does the front.
The force that keeps a motor vehicle's tires from slipping on the roadway surface is known as friction. Specifically, it is the static friction between the tires and the road that allows the vehicle to grip the surface, enabling acceleration, braking, and cornering. This frictional force is influenced by factors such as tire composition, road conditions, and the vehicle's weight. When the force exerted by the tires exceeds the maximum static friction, slipping occurs.
new tires. If the tires brake, you'll need it
Friction between the tires and the road surface is essential for traction, allowing the car to accelerate, brake, and steer effectively. It helps the tires grip the road, preventing slipping or skidding, especially in wet or icy conditions. This friction also plays a role in energy efficiency by allowing the tires to roll smoothly without excessive resistance.
You remove the wheels to replace brake lines.
Yes
Makes no difference. A brake job does not require that you balance your tires. You should rotate and balance your tires every 6,500 to 7,500 miles or as noted otherwise in your owners manual.
It should be the back
When your tires rub against the surface you are riding on to slow you down. When your but is rubbing against your seat to stop you from slipping off. When your hands rub against your handlebars to stop them from slipping off.
Studded tires are the best option for biking on icy roads as they provide better traction and grip, reducing the risk of slipping and falling.
Easy on the gas. Brake gently and early. Don't turn sharp. These is good advice for any vehicle in winter driving. The main reason is due to the lack of friction between the tires and the road. The tires can only exert so much force on the snow without slipping, so any movement must be done gradually and smoothly.