How To: Measuring Brake Pad Wear - Page 2 - Honda CBR250R Forum : Honda CBR 250 Forums
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post #11 of 16 Old 10-02-2014, 11:21 PM Thread Starter
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Originally Posted by MotoMike View Post
Over the course of the past year doing periodic visual inspections of the condition of my CBR's brake pads, I assumed that the front pads were now close to 50% worn, at just over 11,000 miles on the odometer. It wasn't until I measured them the other day that I realized my 50% assumption was wrong, and that they were actually at 85% remaining. Just goes to show that appearances can be deceiving, and not everything is as it appears to be. Obviously that's why we humans came up with ways of measuring and quantifying things... otherwise we'd likely still be living in caves, and hunting Wooly Mammoth's with big clubs and pointy sticks if our forefathers had decided that "guess-timates" were good enough.
Originally Posted by HondaTech2010 View Post
it seems to me that at 11,000 miles on your odo and only 50% of brake pad used based on your riding habits, id say that 22k they will be completely gone, so id say 18k-19k miles they should be needing replaced.
85% of the friction material remaining @ 11,000 miles.
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post #12 of 16 Old 10-05-2014, 03:41 PM
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Originally Posted by MotoMike View Post
85% of the friction material remaining @ 11,000 miles.
it seems you don't use your brakes often then. mostly highway riding i guess? most of my ridings in the city and i am about halfway through a set of pads with 12k miles on my odo.

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post #13 of 16 Old 10-06-2014, 09:17 PM
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I apply this technique to my wallet to see how thick it is.

If there's less than a millimeter left I know it's time to visit an ATM!

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post #14 of 16 Old 12-02-2014, 04:48 PM
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Here are my measurements at 14,000 mi / 22.500 km


Front 0.176"
Rear 0.198"
Pad wear (measured as installed across back of shoes when clamped)
Front 0.713"
Rear 0.920"
New OEM Honda pads (pressed together, measured across back of shoes)
Front 0.709"
Rear 0.737"
Front old pads = installed 0.713" - rotor 0.176" = 0.537"
Front wear = new pads 0.709" - old pads 0.537" = 0.172"

Rear old pads = installed 0.920" - rotor 0.198" = 0.722"
Rear wear = new pads 0.737" - 0.722" = 0.015"
The front wear seems to pass the sanity test but I am wondering if I need to re-measured the installed thickness at the ear because only 0.015" of wear seems almost negligible. Of course I use the front brake more often and more aggressively but I also use some rear brake as well.
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post #15 of 16 Old 12-27-2014, 07:03 AM
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Over joyed to see the great responses and advise on the most important system on our machines: THE BRAKES

Everyone has a "technique" and as our senior members have demonstrated, and expounded upon, what works for you may be different from what works for me....... But making the time to this very important detail is literally a matter of Life and Death.

Inspection, inspection and more inspection!

Some of you may have calibrated "grip" and after a long road trip that incurred a lot of braking, can actually feel the pads or wearing.

As we are sponsored by Galfer and love sintered brakes with Copper, we can actually feel when the pads are at 50% or less, as well as doing a quick spin check on maintenance stands for rotor warp.

Another note worthy mention is your Brake Fluid! Please change it yearly or at first signs of microbiological contamination. I love meeting Motorcycle tour operators in other country's who have not seen the insides of a brake reservoir and then open the caps and freak out from the reservoir corroded and discolored brake fluid. YUC.

My son who has great eyes...he can see a warped rotor, just when someone else rolls the bike for him....It's freaky actually. My daughter on the other hand can't see if the rotor fell off, and as long as the engine starts, she's good to go.........ugh!

I thank everyone for they're input on this overlooked but extremely important Post.

Woot Woot!

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post #16 of 16 Old 09-08-2015, 09:02 PM
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2012 CBR250RA

Front brake pad replacement at 18,000 miles. Front brake was feeling very weak, although some of that is subjective comparison to the monster stopping power of the dual 320mm 4-piston Brembos on my F800GT.

Measurements of pads pressed together, off the bike:

New pads: 0.656" / 16.71mm
Old pads: 0.502" / 12.75mm
Difference: 0.154" / 3.91mm
Wear per pad: 0.077" / 1.96mm
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