Ceramic

[Minion]

I'm not all that clued up on how ceramic bearings are supplied, but if they're just a bearings without the BB cups then you could have a look here for a basic procedure on carrying out the replacement:

https://www.bikehub.co.za/forum_posts.asp?TID=22649

 

Sidetrack: As an engineer I've always known a BB to be a ball bearing. I was confused for quite a while before realising that cyclists use it to name the bottom bracket. This is particularly bad in this case: ceramic BBs in the BB.

 

[Christie]

Some people consider bling bike stuff nice to have. They can enjoy simply riding these, sometimes at the same speed as before.  Looking at their bling bike brings a smile to their faces. Thinngs dont have to be faster to be nice. A steel Pegoretti frame with custom paint wont be light, but it is a work of art!

 

Now, back to ceramic bearings: Good ceramic berings have got less rolling resistance than steel ones, and they are lighter as well. How much faster will they make you? Perhaps not much, but does it matter? 

[Johan Bornman]

The wiper seals used to keep bearings free of dirt have more drag at zero loading than the bearings themselves. Therefore a standard rubber-sealed cartridge bearing and some of the jockey pulleys with seals will seem like they have high bearing drag but they don't have. It is merely the seals doing their job.

 

If you saw a demonstration somewhere with the ceramic bearing apparently spinning longer than a steel bearing you were duped. They've taken the grease and seal out to make it spin freely. With grease and seals a bearing cannot spin freely, even if made from unobtanium.

 

It reminds me of yonks ago at the Rand Show when as slick salesman could show you how a Stromberg gadget on the spark plugs could start an engine that otherwise won't start.

 

Put me in charge of that engine and I'll make it start with lollypops instead of spark plugs and prove that cherry flavoured fizz pops are better than spark plugs.

 

There is a sucker born every minute....no matter who said it.

 

 

[NotSoBigBen]

This is particularly bad in this case: ceramic BBs in the BB.

 

How about if BB puts ceramic BB's in his BB

[Windbreaker]

 

...

With grease and seals a bearing cannot spin freely' date=' even if made from unobtanium.

 

It reminds me of yonks ago at the Rand Show when as slick salesman could show you how a Stromberg gadget on the spark plugs could start an engine that otherwise won't start. ...

[/quote']I seem to remember that those gadgets were made of a special material called Strontium ...

 

I have to disagree with TNT1 on one point... Power meters have a part to play. Maybe not to the extent that some people advocate but they are the most scientific means of training.

 

[Minion]

 

 

How about if BB puts ceramic BB's in his BB

Eish,

http://bp0.blogger.com/_hZXwi6z8pZs/R1LziMaALLI/AAAAAAAAAHQ/W170rQy3Ras/s1600-R/my-brain-hurts.jpg

 

[NotSoBigBen]

Sorry Ed!

[Pocketbikes]

 

Some people consider bling bike stuff nice to have. They can enjoy simply riding these' date=' sometimes at the same speed as before.  Looking at their bling bike brings a smile to their faces. Thinngs dont have to be faster to be nice. A steel Pegoretti frame with custom paint wont be light, but it is a work of art!

 

Now, back to ceramic bearings: Good ceramic berings have got less rolling resistance than steel ones, and they are lighter as well. How much faster will they make you? Perhaps not much, but does it matter? 

[/quote']

 

I got a set of Token jokey wheels. The fact that they came with tiramic bearings had nothing to do with the purchase decision. Bring on the bling!

 

[Christie]

I honestly dont think that ceramic bearings were developed as a marketing gimmic. I do think the gains when used on a bicycle is small compared to other machines running at high rpm. But then again, if they make you think you are faster, perhaps you will be faster.

[Edition 507]

Go for the ceramic stuff Desmond. I have ceramic wheel bearings, BB and jockey wheels. Only thing left is my pedals. Don't let the other hubbers ignorant opinions put you off. Below are some helpful mail order websites that can assist you with the correct bearing selection, as well as other websites of interest (the skeptics may want to visit them as well).

http://www.superflycycles.com/servlet/StoreFront
http://www.enduroforkseals.com/id170.html

 

http://www.rouesartisanales.com/article-14507658.html
http://www.rouesartisanales.com/article-1069980.html
www.ceramicspeed.com

[Bionic man]

The wiper seals used to keep bearings free of dirt have more drag at zero loading than the bearings themselves. Therefore a standard rubber-sealed cartridge bearing and some of the jockey pulleys with seals will seem like they have high bearing drag but they don't have. It is merely the seals doing their job.

 

If you saw a demonstration somewhere with the ceramic bearing apparently spinning longer than a steel bearing you were duped. They've taken the grease and seal out to make it spin freely. With grease and seals a bearing cannot spin freely, even if made from unobtanium.

 

 

 

 Totally agree on this point, I did the same when I was racing Tamiya 1/10 scale RC cars, lap times improved by up to 1sec/lap and battery life went up by at least 1min. Sorry, not something I would recommend with a cycling though, especially an MTB. 'CERAMIC BEARINGS IN MY BIKE' DOES SOUND NICE THOUGH.

[bragajunior]

You really think so? I have changed my jockey wheels to the kcnc ceramic ones' date=' and was amased at how stiff the old ones were compared to the ceramis ones. I ma convinced as well - it does work![/quote']

 

 

 

 

 

Hi Mampara, how much that pulleys?

 

 

 

 

 

 

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I replaced my old ones with the KCNC sealed bearing ones and I can feel the difference. Maybe it's just a good manufacturer.

 

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I'm sure you also get good and bad quality ceramic bearing the same as you get good and bad quality steal bearing.

 

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