Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Your opinion on Ceramicspeed OSP

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Your opinion on Ceramicspeed OSP

Old 05-25-22, 08:55 AM
  #26  
burnthesheep
Newbie racer
 
Join Date: Feb 2018
Posts: 3,406

Bikes: Propel, red is faster

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 1575 Post(s)
Liked 1,568 Times in 973 Posts
Originally Posted by PeteHski
If there was really any worthwhile advantage here, don't you think Shimano/SRAM/Campag would be on to it anyway? The one thing you can say is that not having over-sized pulley wheels certainly isn't going to hold you back in any meaningful way. I love tech, but these are a joke - especially given the price. I would struggle to think of a worse ROI.
Of course it won't, especially for anyone who isn't in the vast minority of folks who would ever benefit from such a thing.

The groupset makers aren't interested in making a straight chainline optimized, not very often shifted, single event use rear derailleur. In other words, they aren't interested in making a time trial rear derailleur optimized for folks who mostly do flat TT's and never shift gears.

The big wheel long cages don't shift as well. So that's a non-starter for them to make that compromise and make tooling and inventory for that. The 1/3 of a single watt or half a watt gained isn't worth the loss of shifting accuracy or speed to most users.

Don't forget, just because the use case being 99.99% irrelevant and meaning a groupset maker won't do it doesn't mean it isn't relevant to the .01% of folks. It's just the marketing push to sell product to folks who don't understand.

We agree here, I just don't agree on some of the rationales being provided. That's all.
burnthesheep is offline  
Old 05-25-22, 09:01 AM
  #27  
TakingMyTime
Senior Member
 
Join Date: Aug 2012
Location: Los Alamitos, Calif.
Posts: 2,478

Bikes: Trek 7.4 FX

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1026 Post(s)
Liked 913 Times in 535 Posts
I'll chime in. I've got some free time this morning.

I too am in the market for a new bike. If I was to be given the item it would be on my new bike in a heartbeat. I don't need it or believe it will improve my performance. But it would be on my bike as soon as I got home.
TakingMyTime is offline  
Old 05-25-22, 09:31 AM
  #28  
popeye
Senior Member
 
Join Date: Nov 2004
Location: Newport Beach, CA
Posts: 1,935

Bikes: S works Tarmac, Felt TK2 track

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 359 Post(s)
Liked 179 Times in 111 Posts
Sell it and buy a skinsuit, win win.
popeye is offline  
Old 05-26-22, 05:05 AM
  #29  
PeteHski
Senior Member
 
PeteHski's Avatar
 
Join Date: May 2021
Posts: 8,176
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 4274 Post(s)
Liked 4,715 Times in 2,911 Posts
Originally Posted by burnthesheep

Don't forget, just because the use case being 99.99% irrelevant and meaning a groupset maker won't do it doesn't mean it isn't relevant to the .01% of folks.
Who are those 0.01% of folks finding a real advantage? What is that advantage in objective terms? (I very briefly saw one report talking about 1W advantage and it didn't even state what the total reference power was). Sounds like it might just about break even against the extra weight and aero drag, lol.

Maybe someone can link to a proper independent study for interest sake?
PeteHski is offline  
Old 05-26-22, 05:25 AM
  #30  
GhostRider62
Senior Member
 
Join Date: Apr 2021
Posts: 4,083
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 2332 Post(s)
Liked 2,094 Times in 1,311 Posts
The 1 watt advantage was at 250 watts for a crappy bushing pulley. Less than 0.1 watts against steel bearing pulleys like Hawk. Around 0.3 watts against most pulleys like Dura Ace or Sram. Approximate numbers by memory. I would not be surprised if that huge OSP pulley costs 1-2 watts to the air at 40 kph.

The one claim that CS makes that contradicts other research is lower friction due to slacker chain tension. They claim 1-2 watt advantage due to lower chain tension IIRC. I'm not an ME, but having looked at it a few year ago, I came to the conclusion their claims were BS. If it was 2-3 watts, I would spend the money to be honest. I came to the conclusion that 80 dollar Hawk bearings were just fine when the stock SRAM pulleys wore out.

I wonder if there is a 5 year old British ME who has looked at these claims?
GhostRider62 is offline  
Likes For GhostRider62:
Old 05-26-22, 06:59 AM
  #31  
PeteHski
Senior Member
 
PeteHski's Avatar
 
Join Date: May 2021
Posts: 8,176
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 4274 Post(s)
Liked 4,715 Times in 2,911 Posts
Originally Posted by GhostRider62
The 1 watt advantage was at 250 watts for a crappy bushing pulley. Less than 0.1 watts against steel bearing pulleys like Hawk. Around 0.3 watts against most pulleys like Dura Ace or Sram. Approximate numbers by memory. I would not be surprised if that huge OSP pulley costs 1-2 watts to the air at 40 kph.

The one claim that CS makes that contradicts other research is lower friction due to slacker chain tension. They claim 1-2 watt advantage due to lower chain tension IIRC. I'm not an ME, but having looked at it a few year ago, I came to the conclusion their claims were BS. If it was 2-3 watts, I would spend the money to be honest. I came to the conclusion that 80 dollar Hawk bearings were just fine when the stock SRAM pulleys wore out.

I wonder if there is a 5 year old British ME who has looked at these claims?
Fractions of a Watt would be pretty hard to verify in testing anyway. There's a lot of variables at play in a drivetrain.
PeteHski is offline  
Old 05-26-22, 07:05 AM
  #32  
GhostRider62
Senior Member
 
Join Date: Apr 2021
Posts: 4,083
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 2332 Post(s)
Liked 2,094 Times in 1,311 Posts
I would be curious to see if Hambini weighed in but not in the mood to listen to a 30-40 minute youtube of his at the moment.
GhostRider62 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.