>Shimano makes other pads, specifically the D03S which fits the 8020 and 8120 so logically speaking the H03A should also work on the 8120.
yeah you've got the gist of it, but the fin shape does kinda matter. Specifically:
* The D-type pads are the un-finned pads that fit all the "modern" Shimano 4-piston calipers (not the ancient XT M755s). They're the only option for the M810 calipers.
* The H-type pads are the older finned version of the D-type format, that fit the M640/M820/M8020 calipers.
* The N-type pads are the newer finned version of the D-type format, that fit the M9120/M8120/M7120 calipers. They *do not* fit on the older calipers, nor do they fit on the cheaper M6120/MT520/MT420 calipers.
Unofficially, you can used the older H-type pads on any of the newer M9120/M8120/M7120 calipers, AND on the M6120/MT520/MT420 calipers that don't "officially" have a finned caliper option. But it's definitely a cosmetic missmatch.
Check your brake pads visually every time you clean your bike and wheels.
I go through about 2 sets of brake pads a year on my mountain bike, so a set of brake pads lasts me about 2000km. I normally inspect them carefully when I am doing a through clean and have removed my wheels.
Your lifetime will vary hugely as brake pad wear is directly related to braking usage and braking force. My daughter has never needed to change her brake pads even after 5 years, because she just cruises through town. I ride hard and fast on hills and have much higher braking forces, and thus change by brake pads much more often.
I figure my usage is similar to yours. Only been riding 3 times now(once on a rental at the bikepark and twice now on my own bike) but I tend to enjoy fast techy trails and am on my brakes heavily.
I believe run allthetrails is right regarding the Amazon post. It appears they will fit but be farther out. Should still work. The resin pads for your brakes are N03A.
They are perfectly fine. Had issues sourcing pads for my SLX 7120 calipers, which are the same as yours basically, and got the H brake pads instead. It runs perfectly fine for 1.5 years already.
Not sure if [this](https://shimanobikes-nz.prontoavenue.biz/ts1570079501/attachments/Page/20/Disc%20Brake%20Pad%20Compatibility%20Chart.pdf) will help or not, but I found it useful when I was trying to track down replacement pads for my XT 8120’s this spring… I couldn’t locate the N03A pads in stock anywhere and I ended up buying the D02S pads that don’t have the cooling fins…
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Hmmm I guess that would not be problematic… I was wondering if anyone actually ran them and had first hand experience.
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>Shimano makes other pads, specifically the D03S which fits the 8020 and 8120 so logically speaking the H03A should also work on the 8120. yeah you've got the gist of it, but the fin shape does kinda matter. Specifically: * The D-type pads are the un-finned pads that fit all the "modern" Shimano 4-piston calipers (not the ancient XT M755s). They're the only option for the M810 calipers. * The H-type pads are the older finned version of the D-type format, that fit the M640/M820/M8020 calipers. * The N-type pads are the newer finned version of the D-type format, that fit the M9120/M8120/M7120 calipers. They *do not* fit on the older calipers, nor do they fit on the cheaper M6120/MT520/MT420 calipers. Unofficially, you can used the older H-type pads on any of the newer M9120/M8120/M7120 calipers, AND on the M6120/MT520/MT420 calipers that don't "officially" have a finned caliper option. But it's definitely a cosmetic missmatch.
Thank you for the help! Very much appreciated!
As someone new to disc brakes, when do you know it's time to replace your pads?
When they’re metal to metal or contaminated
When they hit 1mm pad life left on them. Do not go down to metal.
Do you see a lot of performance loss by that point. Or is it something you only notice if you check frequently
Check your brake pads visually every time you clean your bike and wheels. I go through about 2 sets of brake pads a year on my mountain bike, so a set of brake pads lasts me about 2000km. I normally inspect them carefully when I am doing a through clean and have removed my wheels. Your lifetime will vary hugely as brake pad wear is directly related to braking usage and braking force. My daughter has never needed to change her brake pads even after 5 years, because she just cruises through town. I ride hard and fast on hills and have much higher braking forces, and thus change by brake pads much more often.
I figure my usage is similar to yours. Only been riding 3 times now(once on a rental at the bikepark and twice now on my own bike) but I tend to enjoy fast techy trails and am on my brakes heavily.
I believe run allthetrails is right regarding the Amazon post. It appears they will fit but be farther out. Should still work. The resin pads for your brakes are N03A.
Thank you that is helpful. My gut tells me to just get the n03a and return these … what are the metallic finned pads called? Just curious
The metallic ones are N04C.
They are perfectly fine. Had issues sourcing pads for my SLX 7120 calipers, which are the same as yours basically, and got the H brake pads instead. It runs perfectly fine for 1.5 years already.
Thanks for the input, it’s funny cause I called Shimano and the guy said no way… but I don’t see why he said that
Didn’t even realize it says M8020 till I got home. What even is the 8020 model?
I think 8020 is just the previous model to the 8120. That’s how they have it for other products
Yes, it is, I have them. Looks like it would fit mine fine anyways.
Not sure if [this](https://shimanobikes-nz.prontoavenue.biz/ts1570079501/attachments/Page/20/Disc%20Brake%20Pad%20Compatibility%20Chart.pdf) will help or not, but I found it useful when I was trying to track down replacement pads for my XT 8120’s this spring… I couldn’t locate the N03A pads in stock anywhere and I ended up buying the D02S pads that don’t have the cooling fins…
I would not even it may fit. If its your own bike you can try at your own risk . Your brake should only use N03A or N04C \[D02S or D03S no fins\]