Table of Contents
How do I know what size rotor I need?
- How much do you weigh? As is the case with most components, lighter riders can generally get away with running lighter parts – that is, smaller rotors.
- What do you ride?
- Where do you ride?
- How do you ride?
How do I know my brake pads size?
How do you measure brake rotors?
Does the size of the rotor matter?
The simplest brake upgrade, to gain sheer stopping power, is upsizing rotor size. You can exchange brake pads, experimenting with different material compounds for feel and durability, but rotor size has a much more significant influence on absolute brake performance.
Can you change rotor size?
Yes, but there isn’t much in it at all. SRAM and Shimano both claim a weight gain of just 20g per rotor when switching from a 140 to a 160mm size, and if your frame is designed to take 160mm rotors natively, you can throw away the adaptor that many setups use.
Why are my front rotors so big?
The front rotor is bigger because you CAN brake more with the front before losing traction. The rear rotor is smaller because a whole lot of extra braking force is just going to make the wheel lock up anyway, so a bigger rotor would just be a waste.
Do I need 200mm rotors?
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.
Can you resurface BMW rotors?
BMW has always said that their rotors should be replaced if they are not within spec. No resurfacing, no turning, no machining, just replaced, period.
Where is the minimum rotor thickness?
The rotor’s minimum thickness tells you the minimum operational level of your rotor. This level can be found engraved on the sides of the rotor, within the veins of the rotor, or on the hat of the rotor.
When Should BMW rotors be replaced?
Consistently, BMW rotors need to be replaced every 30,000 – 80,000 miles depending on the factors above. It is always best to reference your BMW maintenance manual for more information.
Will VIN number tell me brake rotor size?
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.
How do I choose rotors?
- Smooth rotors offer the quietest operation, lowest dust and longest pad life.
- Drilled rotors offer slightly more bite and friction than slotted rotors.
- Slotted & Drilled rotors offer a compromise, midway between the benefits of slotted rotors and drilled rotors.
How do you check rotors without removing wheels?
If you have an open-spoke wheel design, you can run your finger vertically down the brake rotor friction surface. If you can feel and see noticeable grooves, then it’s time for new brake rotors. For cars with hub caps that don’t expose the rotor, you will need to remove your wheel to inspect your brake rotors.
How many mm should brake rotors be?
Disc brake rotors usually last so long that many people treat them as ‘fit and forget’ components. However, manufacturers provide minimum thicknesses for their rotors. Shimano recommends that its rotors, which start out 1.8mm thick, should be replaced when the braking surface has been reduced to 1.5mm.
What is the average lifetime of brake rotors?
It depends. A variety of factors, like your vehicle size, driving style and brake quality, contribute to the lifetime of your brakes. Typically, brake rotors last between 30,000–70,000 miles.
Are thicker rotors better?
There’s simply more mass to absorb energy (heat), so thicker rotors tend to stay cooler.
Are 203mm rotors better than 180mm?
Yes, it has more torque so it applies the same amount of pressure to slow the wheel with less initial pressure from the lever blade. You can actually do the math to find out how much more pressure if you know how to calculate torque.
Are front rotors bigger than rear?
The front and rear brake rotors are not the same. The front rotors are bigger than the rear rotors. So, technically, they do not perform the same job. The front rotors handle most of the braking power, and that’s why the front pads wear faster than the rear pads.
Why are there 203mm rotors?
203mm is the size Shimano rotors come in perhaps partly to get you to buy their mounting hardware and brakes to go with them in an attempt to discourage mixing with other brands even though it can be done relatively easily.
Can I put thicker rotors on my car?
Just installing larger rotors won’t do anything for performance and you may have clearance issues with the smaller caliper brackets, not to mention out of spec rotor wear that might cause braking issues. If you want to change rotor size, you should be installing calipers to match.
What happens if rotors are too thin?
When a rotor is too thin, it overheats and warps, leading to an annoying vibration or pedal pulsation. When rotors were thicker, they could take the wear from the brake pads, be machined and still have enough metal left to dissipate the heat.
Can I put any rotors on my car?
Brake rotors and pads are not universal to all cars but can be interchangeable between certain vehicles. The sizing of the pads and rotors, hub bore/pattern, and wheel size are just a few factors that have to be checked before even attempting a swap.
What is the difference between 160mm and 180mm rotors?
1. 180mm rotors offer greater stopping power than 160mm ones and are better for larger riders and harsh descents. 2. 160mm rotors are lighter, provide better modulation and work just fine for small riders and bikes that won’t be used for downhill.
Can I use any rotor with disc brakes?
You can use any rotor you like with any brake, within reason. Some rotors have narrower brake tracks than others, i.e. Shimano, but generally, it’s just a metal disk.