What size disc brake do I need?

Rotor diameter The rule of thumb for determining diameter size and performance is that for every 20mm increment in size you gain up to a 15% increase in braking power. Most mountain bikes now come equipped with 160-180mm rotors for optimal stopping power.

What size brake rotor do I have?

Call your local OEM dealer and ask for the original rotor sizes or OEM rotor/pads part numbers based on your vehicle’s VIN number (VIN# is referenced in your ownership papers). The dealership may not tell you the rotor size, but they will give you the genuine part numbers for your vehicle.

What size bike brake rotors do I need?

For aggressive enduro riders with large 29” wheels, 200 mm rotors are mandatory and upgrading to 220 mm rotors is worthwhile for heavier riders. Trail bikes also benefit from powerful brakes. Unless you’ve got powerful brakes such as SRAM CODEs or a four-piston Shimano model, we would always resort to 200 mm rotors.

How many mm should be on brakes?

Your brake pads’ minimum thickness should be at least 6.4 millimeters. Above all else, you do not want the thickness to get any less than 3.2 millimeters or it will be very dangerous to drive.

How do I know what brakes to buy?

First, check for wear by looking at your brake pads through the spaces between the wheel’s spokes. The outside pad will be pressed against a metal rotor. Generally, there should be at least 1/4 inch of pad. If you see less than 1/4 inch of pad, you may want to have your brake pads inspected or replaced.

Are front rotors bigger than rear?

Front rotors are larger because the front brakes do most of the work. Using rotors the same size on the rear would waste gas (more weight) and make the car handle worse (extra unsprung weight) and accelerate slower (more rotating mass.)

Is 5 mm on brake pads OK?

At 5 MM you have roughly 50% of the brake pads remaining, but you should plan on replacing them when they wear below 2 MM. Your brake pads, should have started squealing already,that is a warning that your pads are close to becoming none existant,and need replacing soon.