2021 Panigale V4S Rear bearing question?

Ducati Forum

Help Support Ducati Forum:

R

r0hx

Joined
Nov 26, 2021
Messages
39
Location
USA
Does anyone know the size of the bearings in the rear hub / wheel area want to replace them with ceramic bearings.
 
SFK
RNA 4910-2RS
SFK
BAH-0175

1 You will not find ceramic replacements for these
2 ceramic bearings would do absolutely nothing in this application as the drag from the seals and general assembly would negate the slightest immeasurable difference anyhow. Silly
 
endodoc said:
SFK
RNA 4910-2RS
SFK
BAH-0175

1 You will not find ceramic replacements for these
2 ceramic bearings would do absolutely nothing in this application as the drag from the seals and general assembly would negate the slightest immeasurable difference anyhow. Silly
Click to expand...

Thanks for the info.
I doubt there is no actual improvement and if it exists it can be made so don't be so sure that its impossible to find.
 
r0hx said:
Thanks for the info.
I doubt there is no actual improvement and if it exists it can be made so don't be so sure that its impossible to find.
Click to expand...
We’ll you would have to have a metric to measure improvement and in this case, the measurable improvement would be absolutely zero to the overall performance of the bike. You should probably do all the engine and gearbox bearings and remove all the orings from the chain and of corse you probably already have the new zero drag GP brake setup, anti squat, rider assisted aero package etc. if you don’t have all those things, your priorities are a bit skewed.

For anything but a high temp aerospace application, ceramic bearings are like putting a condom on a neutered male. Lastly one side of that setup is a needle bearing application so good luck having that made and if you do spend the thousands of dollars it would take for a custom application, save some for the shrink.
 
endodoc said:
We’ll you would have to have a metric to measure improvement and in this case, the measurable improvement would be absolutely zero to the overall performance of the bike. You should probably do all the engine and gearbox bearings and remove all the orings from the chain and of corse you probably already have the new zero drag GP brake setup, anti squat, rider assisted aero package etc. if you don’t have all those things, your priorities are a bit skewed.

For anything but a high temp aerospace application, ceramic bearings are like putting a condom on a neutered male. Lastly one side of that setup is a needle bearing application so good luck having that made and if you do spend the thousands of dollars it would take for a custom application, save some for the shrink.
Click to expand...
To spend all of the time writing something to be contradictory to the question I was asking. All I asked was what bearings were in the hub and no it does not take thousands of dollars to make a custom one. It was a simple question, I didn't require the opinion of whether or not you thought it was a good idea or worth while doing. Have you done this before? Have you used ceramic bearings before, if so what was the results? Is there any evidence or proof to what you are saying or are you just trying to argue to argue?
 
My ceramic bearings that I had ordered with my BST's, failed in one season, track days only. That was my experience, just keep an eye on them.
 
Keith197 said:
My ceramic bearings that I had ordered with my BST's, failed in one season, track days only. That was my experience, just keep an eye on them.
Click to expand...
I will keep that in mind, Ill see how well they do I'm sure like any other moving part its going to be something that will have to be replaced relatively often.
 
r0hx said:
To spend all of the time writing something to be contradictory to the question I was asking. All I asked was what bearings were in the hub and no it does not take thousands of dollars to make a custom one. It was a simple question, I didn't require the opinion of whether or not you thought it was a good idea or worth while doing. Have you done this before? Have you used ceramic bearings before, if so what was the results? Is there any evidence or proof to what you are saying or are you just trying to argue to argue?
Click to expand...
Yep, sure have. I have toyed with ceramic bearings in a number of applications and in every single circumstance, there was very little justification to use them when they may have been beneficial thermally (turbocharger)and zero justification for anything that falls under general high performance bearing applications.

Ceramic bearings for skateboards, bicycles, motorcycles etc is marketing hype to get you to spend more money. Here is the test bed. They take identically weighted rotating masses in an identical environment with the two bearings both utilizing dry or an extremely light viscosity oil and a machine spins both masses to a specific rpm and they time the rotation. You may see the ceramic bearings in motion for a couple of additional rotations depending on the quality of the bearings and you may not depending on the same. If the rotational mass advances one more revolution, boom, there’s your advertisement. Ceramic bearings provided a higher endurance than conventional bearings.

What’s the translation to your proposed application. There will be absolutely zero gain by attempting this project.

So I did provide you with the data you wanted and I threw the rest on top of it to hopefully prevent anyone else reading the post from wasting their money.

Now I’m guessing you have not disassembled hub but when you do, you will see that the bearing seals and the compression tolerance on the bearings and the spacer inside generate quite a bit of rotational friction by design. Ceramic bearings in this application is seriously putting a bandaid on a gunshot wound. Completely worthless.

Hey man, it was your first post and you got the answer that you were looking for. Unfortunately you followed it up with some nonsense. You have obviously made up your mind that this rabbit hole will lead to faster lap times around the local Starbucks but I’m hoping to save others time, money and grief.
 
r0hx said:
I will keep that in mind, Ill see how well they do I'm sure like any other moving part its going to be something that will have to be replaced relatively often.
Click to expand...

That’s nonsense. Bearings should not have to be replaced often.


If you’re going down the ceramic bearing route I’d assume you are also addressing your braking system with a true full floating setup? The OEM braking system creates more drag than the steel bearings. Try spinning your front wheel with calipers off and then with them on and you’ll see what I mean.
 
Last edited:
@r0hx I was just joking on my post about endo. There was a thread here which went sideways and dudes were posting pictures of their watches which cost more than my SUV. I'd trust his advice.

Unless you are trying to break records and ride at the 1% level, invest more in software than hardware.
 
bp_SFV4 said:
@r0hx I was just joking on my post about endo. There was a thread here which went sideways and dudes were posting pictures of their watches which cost more than my SUV. I'd trust his advice.

Unless you are trying to break records and ride at the 1% level, invest more in software than hardware.
Click to expand...
Ok that was funny and in all seriousness, I am .... most of the time but seriously, there are a lot of guys on here that are pretty good at using their heads, really good riders and know the difference between good skin and makeup. take advantage of that, save some money or put it into a more prosperous path.
 
endodoc said:
Yep, sure have. I have toyed with ceramic bearings in a number of applications and in every single circumstance, there was very little justification to use them when they may have been beneficial thermally (turbocharger)and zero justification for anything that falls under general high performance bearing applications.

Ceramic bearings for skateboards, bicycles, motorcycles etc is marketing hype to get you to spend more money. Here is the test bed. They take identically weighted rotating masses in an identical environment with the two bearings both utilizing dry or an extremely light viscosity oil and a machine spins both masses to a specific rpm and they time the rotation. You may see the ceramic bearings in motion for a couple of additional rotations depending on the quality of the bearings and you may not depending on the same. If the rotational mass advances one more revolution, boom, there’s your advertisement. Ceramic bearings provided a higher endurance than conventional bearings.

What’s the translation to your proposed application. There will be absolutely zero gain by attempting this project.

So I did provide you with the data you wanted and I threw the rest on top of it to hopefully prevent anyone else reading the post from wasting their money.

Now I’m guessing you have not disassembled hub but when you do, you will see that the bearing seals and the compression tolerance on the bearings and the spacer inside generate quite a bit of rotational friction by design. Ceramic bearings in this application is seriously putting a bandaid on a gunshot wound. Completely worthless.

Hey man, it was your first post and you got the answer that you were looking for. Unfortunately you followed it up with some nonsense. You have obviously made up your mind that this rabbit hole will lead to faster lap times around the local Starbucks but I’m hoping to save others time, money and grief.
Click to expand...
The reality is you filled up like 5 paragraphs to nothing I wanted to waste the time to read. It was a simple question why add all the extra context that wasn't required.

bp_SFV4 said:
@r0hx I was just joking on my post about endo. There was a thread here which went sideways and dudes were posting pictures of their watches which cost more than my SUV. I'd trust his advice.

Unless you are trying to break records and ride at the 1% level, invest more in software than hardware.
Click to expand...

Nah, its not about breaking any records it was just a simple question that got derailed into a .... measuring contest.

brad8266 said:
That’s nonsense. Bearings should not have to be replaced often.


If you’re going down the ceramic bearing route I’d assume you are also addressing your braking system with a true full floating setup? The OEM braking system creates more drag than the steel bearings. Try spinning your front wheel with calipers off and then with them on and you’ll see what I mean.
Click to expand...

That's on the list of things I'm doing just wanted to ask about the bearings nothing more than that. Already swapped the chain / sprockets / sprocket carrier to a 520 setup, BST's on the way.
 
endodoc said:
SFK
RNA 4910-2RS
SFK
BAH-0175

1 You will not find ceramic replacements for these
2 ceramic bearings would do absolutely nothing in this application as the drag from the seals and general assembly would negate the slightest immeasurable difference anyhow. Silly
Click to expand...

Yeah I got the front wheel ceramic bearings to put on, but was talking to the guys at HSBK Racing about the rear ceramic bearings abs they said they don’t even carry them because they are a huge pita with no substantial benefit.
 
Steven31371 said:
Yeah I got the front wheel ceramic bearings to put on, but was talking to the guys at HSBK Racing about the rear ceramic bearings abs they said they don’t even carry them because they are a huge pita with no substantial benefit.
Click to expand...
Found the bearings and the price was actually reasonable unlike everyone was making it out to be. I'll be the judge of if its worthless or not.
 

Similar threads

F
2018 Panigale V4S bits of gold in oil, some questions on next steps
Replies
19
Views
377
shade
shade
NYCV4S
V4 owners - 15w50 oil reports with testing - Motul 300v / Redline Power Sports / Motul 7100 - Part 1
2
Replies
35
Views
1K
Greasey monkey
G
S
Race tire question
Replies
1
Views
124
mattinrsm
M
S
2020 Panigale V4S Headlight LEDs
Replies
2
Views
144
siddharthay91
S
P
2023 Panigale V4S Motorcycle Front Stand Question
Replies
4
Views
153
Paul G
P

Register CTA

Register on Ducati Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Back
Top