You can also put coins on the disk surfaces, measure the thickness, then put the two coins together and measure their total thickness. Subtract that from the first value, and you know how thick the brake disk is.

Speaking as a retired machinist, it’s so nice to see someone using a VERNIER caliper. I still have my first one. It’s a Helios, and it is marked “Hardened throughout, West Germany”. I still use it, although I own a digital and a dial caliper.

Thank-you, brilliant clear and concise information. Now I know exactly what to measure on my M5 brake discs 👌

Great video! You make look very simple, which I actually think it is. But at the same time, you go beyond a simple measurement and take the grooves into account. Thanks for that!!

Out of the other videos trying to understand what to look for in a worn out rotor, this was the very best and informative! Thank you!

thanks, the best explanation I ever had

Excellent! Very descriptive and informative. One of the best professional videos I have ever seen on car maintenance. Thank you very much for your time and information. I will try and search out other videos if you have them.

One of the best videos for measuring. Good techniques.

Thank you! This has been one of the best and most concise explanations I've seen 🤓

A wonderfully detailed and clear explanation. From England. Thank you.

Thank you man, excellent video and really good information. I had same experience, my brake works fine in most cases until I brake hard in emergency at 80 mph in the interstate from an accident ahead. It vibrate like hell but nice and smooth at regular braking.

Great video.thank you so much!please upload more informative videos sir! Detailed and clear!thumbs up!👍

Hi, I put febi bilstein brake disks and ATE brake pads on my Suzuki Swift last year. There was nothing wrong with the measurement , there was still lots of pad and disk thickness, but it was making a slight noise every now and then, when I had them checked at the dealer , they said it was fine, but it was a little scorched looking. They said 70% pad life still left OEM. Anyway I decided to replace both. I recently flushed/ bled my brakes using your Mazda video as a reference, it made a huge difference as my brake fluid was more the 6 years old, now the car is awesome to drive. I did a full tune up. Thank you for the videos, I learn a lot.

Thanks for a good explanation,Mankgabane from South Africa

Very professional explanation!! thank you!!

Very well explained, thanks a lot!

Thanks for the very informative video, nice to see south african youtubers

Great video. Another way you can compensate for the disc lip is by using two thick coins. Measure the thickness with the coins on either side of the disc and then zero out or subtract the thickness of the two coins stacked together to get a more accurate thickness of the actual disc.

Great job, you made a very professional and well made video.

Very good explaination. Nice to hear a SA accent.

Excellent video. Thanks for sharing!

I have learnt so much already and to pay more attention, thank you sir

Excellent Photography and explanation !

Cracking Video mate, clear and concise, top drawer.

Very detailed and great explaining video, thank you

Super video never knew what the pointy end of the vernier gauge did until today

“INDEED EXCELLENT EXPLANATION”! 👍🏼

Excellent video !

Very very good! Simple clear information I never knew and wondered about.

Well done, lessons well taught

Excellent video very clear and easy to follow

Great detailed info 👍

Nice video , thanks !! I have learned good things today 💪

Great video, thank you!

Golden info. Thank you

Great video... Thanks much

Very very nice video. Very well explained! :-)

Greetings from UK Great informative tutorial video, lovely SA accent?

Very great guide!

Outstanding video

You are a genius.

Even with the South African accent I understood every word. I would say your knowledge base is equivalent to semi-pro. Good job my man!!!

This is the canonical video for this question - thank you for making it

Great video, so clear and love the accent (South African?) - thank you for making this, helped me out :)

nice video thanks

Good information clearly explained.

Awesome video

Dankie meneer..

I found my pads starting to scrape at the weekend I reckon I'll just change the rotors as well. I just bought it recently and as I intend to keep it for a while there's no point in skimping.

Great video and well said explanation 👍🏻

Super‼️ 👍😉😀

Hello from croatia. Mine is at 26.2 thickness, and minimum is 26.4. Is it ok to use one more brake pads on it ?

Why there was smoke coming in Skoda Superb the disc was not even and we put the new brake pads?

Hi. Thanks for the vid. Won't the Guages used for the spark plug gap help measuring the thickness of the lip?

Excellent

very detailed and clear explanation. thanks👍

What's it like driving with the wheels spacer?

Best thing you can do is invest in the tools and learn how to replace pads and rotors yourself. The cost of new rotors and pads aren't very high, most times you're paying for the labour.

i change rear brake pads and now when i press the brake little bit is making so much noise is it from the brake pads quality?

Hi,it is great video,i just have a question.did you measure two different disc rotor? First one was 22mm and then suddenly it went to 28 mm?is it different car? Sorry maybe i missed some clip!

I hear a saffa, I up vote!

Very well and pedagogically described. Can the discs be used even if they exceed the minimum size? -Yes if you don't drive advanced to pick up the kids from school or drive in the mountains like a hillbilly on meth. A thin brake disc overheats faster. Drive normally and you can probably wait a little longer for the change. It is a matter of judgement.

Love the ubiquitous background doves!

6:50 so 29.6mm was somewhere near the "new" state of the disc. let's say it was 30.0mm new. substracting from there the 28.4mm minimum requirement, that would mean accounting for both sides of the disc, the max wear would be something like 0.8mm per side ? that's a pretty small amount that you are allowed to wear the disc out, no? if some cars have 1.5mm lip on one side that's about double the "life" expectancy on this one that you checked 3:10 and looking back to the first set you checked, min=22.4, i guess new=25.0mm(rounding up from the 24.8 you measured). so actually the accepted wear on these is 2.6mm, 1.3mm/side. this disc is thinner but has more "life" in it than the first one?? really weird...... also, for heat dissipation purposes, just as you said, would we not actually have thicker discs on the front? in your case the thicker ones were on the back. again...weird

Why bang door if it is comfort access. Just needs a touch to make contact.

On a percentage of vehicals. The rim is bolted to the hub. Not resting on lugs so my challenge and question is. Can you check the rotor thickness. Without taking off the rim?

Could not find the specs on the rotors

My left brake pad finished, and now my left disc is damaged 😭 should have changed the pads earlier 😢

Pro tip: Don't put your head under the tire when fitting the trestle.

Micrometer would be the better tool

I went to service and they told me to change front brake disks and all the arms because i have a vibration in the steering wheel when braking, i think they don't know where's the problem 🤷‍♂️🤷‍♂️

Micrometer required

The lip on my rotor is probably 3-4 mils 😬

You could have used screw gauge.

Yay... Renault!!

To be honest having worked in the motor trade I never ever once saw a disk skimmed. Flywheels all the time but never the brakes! It's so cheap to change the Disks it never worked out worth it and the biggest problem is the time and transport to a machine shop and how busy they were never out weight the costs!

Why don't you use the correct tool to measure the disc? There are calipers with "C" shape jaws and there are micrometers, often shaped like c-clamps.

use a micrometer to measure.

What you all really need is a "Vinca DRGA-0605 Electronic Digital Brake Disc Rotor Gauge Caliper measuring tool"... Worth every penny, the highest quality by a top brand and it will last you a lifetime! Is the only one with 2 external jaws (claw type) the measures your discs from the sides withing and not the edges... No more need for all these Micky Mouse tricks as its a much accuracy tool and time saver! A MUST FOR ALL BMW OWNERS that do their own sh*t...

Lol the disc have a wear indicator

hade being scammed buy mechanics, worse when times are very hard

Vernier is not build for purpose in this case. Get yourself Micrometer. It will take calculator sorcery away. Plus you do not know how correctly to use Vernier. It was exactly 0.54 mm at 4:06.

Thank you so much❤. Im a woman and needed this info. How do you keep it from rust?

Very well explained. Thanks!

Excellent video!