Brake Pad Thickness - Stock vs AP Racing vs PP Brembo - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dylans47 · 02-09-2022, 10:49 PM

Trying to figure out the pad thickness on the stock and PP brembo brakes compared to AP Racing. I know AP Racing's CP8350 caliper runs 20mm thick pads (including the backing plate) and 15mm? without backing plate. Stock I believe is 10mm without backing plate. Can anyone confirm the AP Racing and stock w/o backing plate? And any idea what the PP runs on thickness?

Thanks!

gen3v8 · 02-10-2022, 12:00 AM

DBA has PP pads @14mm

86league · 02-10-2022, 12:07 AM

I think stock are 18mm with a 6mm backing plate
PP Brembo are ~15mm with a 5mm backing plate

Carbotech matched the numbers above for the stock. For the Brembo, Cobalt says 15.3, but the PFC pads I get measure about 14.8 with a 5mm backing plate.

Gray is roughly the AP pad shape. :

Area/volume numbers are my estimates and may not be correct - the rest is from drawings from Cobalt Frictions website.

timurrrr · 02-10-2022, 04:37 AM

CSG front pads for the PP calipers have CSG.1001.16.xx part numbers.

I haven't measured the total thickness specifically, but I believe it's 16 mm

I measured the pad material however, and it was 10–11 mm, depending on the model and the batch. The 11 mm C1's were a bit challenging to squeeze into the caliper, there was almost no wiggle room left.

Dylans47 · 02-10-2022, 05:17 PM

Interestingly we have 3 different answers now! W/o backing plate for PP: 14mm, ~15mm, and 10-11mm.

I'm surprised these measurements aren't relatively well known, since it would help justify, or not, the purchase of BBK or PP or sticking with a base model...

Edit: On second looks, 86League is saying ~10mm w/o backing plate. My mistake!

Dylans47 · 02-10-2022, 05:56 PM

Quote:

Originally Posted by 86league

I think stock are 18mm with a 6mm backing plate
PP Brembo are ~15mm with a 5mm backing plate

Carbotech matched the numbers above for the stock. For the Brembo, Cobalt says 15.3, but the PFC pads I get measure about 14.8 with a 5mm backing plate.

Gray is roughly the AP pad shape. :

Area/volume numbers are my estimates and may not be correct - the rest is from drawings from Cobalt Frictions website.

That's a surprisingly small surface area on the AP pad - smaller than stock! Do you have a source for this?

timurrrr · 02-10-2022, 07:45 PM

Quote:

Originally Posted by Dylans47

Interestingly we have 3 different answers now! W/o backing plate for PP: 14mm, ~15mm, and 10-11mm.

What? The 14 mm and ~15 mm numbers were given with the backing plate, and 10-11 mm were given without the backing plate.

They all seem to suggest a ~5 mm backing plate and ~10 mm of pad material.

gen3v8 · 02-10-2022, 08:08 PM

Just to clarify my PP figures. Plus I remembered I had a new set.

Dylans47 · 02-10-2022, 10:34 PM

Quote:

Originally Posted by gen3v8

Just to clarify my PP figures. Plus I remembered I had a new set.

Thanks! So some certain metrics are (w/o backing plate): PP - 10mm, AP Racing Sprint - 15mm

Just wondering what stock is now!

Dylans47 · 02-10-2022, 10:36 PM

Quote:

Originally Posted by timurrrr

What? The 14 mm and ~15 mm numbers were given with the backing plate, and 10-11 mm were given without the backing plate.

They all seem to suggest a ~5 mm backing plate and ~10 mm of pad material.

See original edit, I was mistaken. Just wondering what stock is now! I would guess 10mm w/o backing plate since it's OEM toyota/subaru too?

02-09-2022, 10:49 PM	#1
Dylans47 Senior Member Join Date: Nov 2017 Drives: Scion FR-S Location: California Posts: 176 Thanks: 49 Thanked 41 Times in 24 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Brake Pad Thickness - Stock vs AP Racing vs PP Brembo Trying to figure out the pad thickness on the stock and PP brembo brakes compared to AP Racing. I know AP Racing's CP8350 caliper runs 20mm thick pads (including the backing plate) and 15mm? without backing plate. Stock I believe is 10mm without backing plate. Can anyone confirm the AP Racing and stock w/o backing plate? And any idea what the PP runs on thickness? Thanks!

02-10-2022, 12:07 AM	#3
86league Senior Member Join Date: Jul 2016 Drives: '13 BRZ Limited Location: League City, TX Posts: 202 Thanks: 16 Thanked 114 Times in 66 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I think stock are 18mm with a 6mm backing plate PP Brembo are ~15mm with a 5mm backing plate Carbotech matched the numbers above for the stock. For the Brembo, Cobalt says 15.3, but the PFC pads I get measure about 14.8 with a 5mm backing plate. Gray is roughly the AP pad shape. : Area/volume numbers are my estimates and may not be correct - the rest is from drawings from Cobalt Frictions website. Last edited by 86league; 02-10-2022 at 12:42 AM.

02-10-2022, 05:17 PM	#5
Dylans47 Senior Member Join Date: Nov 2017 Drives: Scion FR-S Location: California Posts: 176 Thanks: 49 Thanked 41 Times in 24 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Interestingly we have 3 different answers now! W/o backing plate for PP: 14mm, ~15mm, and 10-11mm. I'm surprised these measurements aren't relatively well known, since it would help justify, or not, the purchase of BBK or PP or sticking with a base model... Edit: On second looks, 86League is saying ~10mm w/o backing plate. My mistake! Last edited by Dylans47; 02-10-2022 at 05:56 PM.

02-10-2022, 08:08 PM	#8
gen3v8 30 minute maintenance Join Date: Oct 2020 Drives: My18 wrxsti Location: Botany Bay Posts: 1,178 Thanks: 769 Thanked 1,236 Times in 631 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Just to clarify my PP figures. Plus I remembered I had a new set. Attached Images

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02-10-2022, 12:00 AM	#2
gen3v8 30 minute maintenance Join Date: Oct 2020 Drives: My18 wrxsti Location: Botany Bay Posts: 1,178 Thanks: 769 Thanked 1,236 Times in 631 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	DBA has PP pads @14mm

02-10-2022, 04:37 AM	#4
timurrrr Senior Member Join Date: May 2019 Drives: 2022 GR86 Location: Between Sonoma and Laguna Seca Posts: 1,726 Thanks: 2,145 Thanked 1,323 Times in 727 Posts Mentioned: 31 Post(s) Tagged: 1 Thread(s)	CSG front pads for the PP calipers have CSG.1001.16.xx part numbers. I haven't measured the total thickness specifically, but I believe it's 16 mm I measured the pad material however, and it was 10–11 mm, depending on the model and the batch. The 11 mm C1's were a bit challenging to squeeze into the caliper, there was almost no wiggle room left.

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