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2024-12-08 05:31:20

Ceramic vs steel bearingsbike

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“The rolling resistance of a ceramic bearing compared to an ABEC 3, 5 or 7 steel ball bearing is offset by the resistance of the grease,” he says. “In order for a ceramic ball bearing to out-perform a steel ball bearing, grease is not an option. Does this mean I should run my ceramic ball bearings dry or with light oil? Yes, but you won’t like the result in an environment where the bearings can become contaminated. If you run your bearings dry they will feel gritty and rough.”

If, and it seems it is from the above, the main argument against CB is the cost then they're worth it if available cheaper.

Each issue has its own telltale signs of trouble. Here’s what to look out for and how to tell the difference between a wheel alignment or wheel bearing:

“Although the re-selling markup/ margin for ceramic bearings is significant for manufacturers such as Reynolds, and they could represent a profit-center for the brand, we choose not to offer them because they don’t improve performance, and they represent a consumer cost that we can’t justify, and that’s contrary to our value system," he concludes.

Riding in a car or truck should be a smooth, seamless feeling. Yet, over time with wear, hitting curbs, and driving on a variety of terrains can throw off the suspension and change the feeling of the ride. Sometimes a simple alignment is all you need but not always. A bad wheel bearing can have similar effects that poor alignment produces. Know the difference between wheel alignments and car wheel bearings and how each can be resolved to restore your comfortable ride.

It’s clear that Alan and Paul agree that the factors that make a ceramic bearing well-suited to industrial and medical equipment applications, and high-altitude operating drone motors (Paul does a lot of work designing drones) where the rpm is high, the load is low and the operating conditions are clean, are factors that mean they’re not suited to cycling.

Spherical roller bearing (operating temp.: max. 200°C)

Despite the latest advances in road bike design and technology, your bicycle still relies on the humble ball bearing to ensure it all runs smoothly. There are bearings in the wheel hubs, the headset, bottom bracket, pedals and jockey wheels, and they're commonly made from steel. There has been a lot of hype about ceramic bearings in recent years and many people claim they offer a performance upgrade. But what are ceramic bearings and what are the pros and cons?

High end bikes have become status purchases and ceramic bearing were just one more way to extract money. Those stupid oversized pulleys are the same thing.

For example I have some DT hubs with 6902 bearings (15x28x7mm). These steel bearings are rated for speeds up to 16,000rpm with full contact rubber seals or 24,000rpm with metal shields by the manufacturer. At 50kmh my wheel would only be rotating around 400rpm !

Once adjusted, it spun longer than even a brand new set of Ultratorque or Hollowtech II bottom bracket bearings. Without the chain on, the cranks just spun and spun. Not as stiff, but a lot smoother. 'Sweet as a nut' as someone said above.

The fact that such self driving cars don't BMW/Audi drivers do exist is proof - as if it were needed - that Gods don't exist

One more thing the bike industry told us was better and we should spend money and then it turns out it is not even AS GOOD as what we alreay have...

Hmmm, how come the mention of aerozine and other affordable ceramic bottom brackets did not rate a mention. The current option of $58 usd on ebay has to be a reasonable option..not to mention a Taiwanese option for

Ceramic bearings vsstainlesssteel

I don't know if its been linked before but if you're remotely interested in splashing the cash on ceramic bearings watch this first: https://www.youtube.com/watch?v=o7iZVfSDbiA

When the benefits sound that good, you’d think all component manufacturers would be embracing ceramic bearings, right? Highly regarded British component manufacturer Hope Technology reckons the efficiency savings are simply too negligible to make them worth the increase in cost.

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I've had it 9 months or so now and still can't tell the difference - but that said all the bearings on my bikes are high end. Chris King bearings are a pain in the arse and need servicing regularly. Could have bought some DT Swiss 240s for the money....

While regular bearings are made from stainless steel, ceramic bearings are made from ceramic silicon nitride (Si2N4). Rolling resistance is the key trump card promoted by ceramic bearing fans. Because ceramic bearings are rounder with a smoother surface and more uniform size, friction is reduced and that can contribute to a less energy required to turn the cranks or spin the wheels. A ceramic bearing is also harder than steel bearings (up to 30%), which improves durability, and they also don’t rust so less maintenance should be required.

The wheel bearing is a precision machined component that is integral to the safe and comfortable ride of your car or truck. There are 4 wheel bearings in a car ...

He reckons the most reliable bike he ever bought was his Giant Defy Advanced Pro from about 2015 which cost him about 25% of his handhbuilt exotica grief machine.

The single biggest issue when specifying bearings for bikes is the trade-off between sealing efficiency and low drag. Generally you can't have both.

I'm going to protest too much and say that my Factor came with these bearings as standard and it doesn't have the stupid oversized pulleys (though they probably add more efficiency to pedalling than ceramic bearings)....

Paul Lew's articles are no longer available on Reynolds web site. They were a good informative read. Maybe he can publish them again somewhere.

Yes, the 2'999 euros carbon-Di2 is a bit less colorful... They also have a carbon gravel bike with SRAM Rival AXS for that price... Nuroad C:62 EX

“The main advantages with CeramicSpeed bearings over regular bearings are two-fold,” explains CeramicSpeed Managing Director Martin Banke. “Longevity of a well-built high-quality ceramic bearing, in many cases, can be up to 10 times longer than commonly used stock bearings. The 'rule of thumb', as we like to call it when built well, and of high-quality materials, a ceramic bearing should always be able to outlast and outperform a steel bearing.

That, in theory, should mean less energy is required to turn the wheels or cranks. Add the lower weight and improved durability, and why wouldn’t you run ceramic bearings? But are all ceramic bearings the same? Of course not, CeramicSpeed is keen to point out that not all ceramic bearings are made equal, and it tells us that a ceramic bearing built poorly with low-quality materials will deliver very poor longevity.

Ceramic bearings vs steelskateboard

Camber has to do with the vertical slope or angle of the wheels. The camber may be off if the wheels are positioned at an incorrect angle on the road. Toe has to do with the direction in which the wheels are rolling. All four wheels must roll in the same direction simultaneously. Caster refers to the balancing angle in relation to the vehicle’s weight and steering. Similar to a bicycle’s front and forks protruding forward. Too much or too little caster makes controlling the vehicle much more difficult and may cause the vehicle to drift. When a technician performs an alignment, the vehicle is hooked up to an intuitive machine and takes measurements on the position of each wheel. The results will provide details on the current alignment and what adjustment or repairs may be needed to put the suspension back to the manufacturer’s specifications.

Wheel bearings is a set of steel balls that are held together by a cage and a metal ring called a “race.” Their purpose is to help the wheels spin and reduce friction. Bearings are positioned on a metal axle shaft within the hollow metal piece in the center of the wheel, also known as the hub. The hub is the apparatus that holds the lug nuts used in bolting the tires to the wheel. They are required to hold the weight of the vehicle while traveling over all terrains as well as accept the parallel forces of corners all while permitting the wheel to spin at thousands of resolutions per minute. Because of their proximity to the road, they must be sealed units to keep road dust, debris, and water out.

Yes, of course. I am lucky to have two such shops close by. One of them has even on occasions effectively acted as a broker, for deals between...

It’s in the professional peloton, a place obsessed with marginal gains, that ceramic bearings have become popular in the past couple of years. And naturally, where pros lead, amateur racers and sportive cyclists follow, keen to take advantage. Should you be following in the footsteps of the pro racers then, and upgrading your bike with ceramic bearings?

Hope’s Alan Weatherill concurs with Paul Lew’s conclusion that ceramic bearings are not suited to the demands of cycling and says their suitability to industrial machinery doesn’t necessarily provide the performance benefit for cyclists that many people and companies claim they do.

Ceramic vs steel bearingsknife

Hi nice article road.cc! I also saw this video: https://www.youtube.com/watch?v=vPWgtscgfa0 both of which seem to suggest ceramics bearings don't work as well as claimed? Maybe the gig is up for ceramics? bw Maria

“Ceramic bearings are beneficial in environments not requiring grease lubrication,” says Lew. But a bicycle is expected to cope with a vast range of conditions, rain and dirt, and where maintenance schedules may be less than optimal, and the last thing you want is to ride bearings without grease. It’s this requirement to cope with the conditions common to cyclists that offset the promised lower rolling resistance of a ceramic bearing, according to Paul Lew.

I have a mate with an embarrassingly expensive handmade Titanium bike and he got it fitted with all sorts of exotic parts. It had a ceramic bearing BB that never worked even at the cost of over £200. It kept coming undone. The tightening instructions didn't work, and it would tighten up to being seized. Pointed out how many sets of bearings he could throw away for the price of his troublesome supposedly last forever BB.

Ceramic bearings vs steelcost

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One of my sons bought an overpriced (at least I thought at the time) fidget spinner on holiday recently. It seems a feat of engineering to my unengineery mind. If you so much as look at it it will spin for 3 days. It is not your common garden fidget spinner, and my son loves it.

Also with a cartridge bearing you should never need to remove the seals to wash it out and re-grease it. Basically if dirt or water has got past the seals then it is already too late and time to replace it.

Use quality replacement steel bearings from one of the four major global brands SKF, FAG, NSK or NTN and choose the seal type depending on intended use. So for example an indoor track bike could use shielded bearings (metal shields with no rubbing contact, often referred to as ZZ type). For a MTB that you wash down with a pressure washer you will want full contact rubber seals (2RS, LLU, DDU etc). Consider removing the inboard seal to reduce drag.

Since my washing machine quote 8 months ago, I've acquired a Factor 02 which has Ceramicspeed bearings (BB and wheels) fitted as standard. I can't notice the difference over my other bikes - all of are 15+ years old and either Chris King / Shimano Ultegra or Chorus / Chorus, and Record / Record....

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One the same bike I've fitted higher end (but still not expensive) CB BB and pulley wheels. As above - faster for longer.

89313-TV-INA Axial cylindrical roller bearings ; CAGE MATERIAL. Polyamide cage ; TEMPERATURE RANGE: -20 to +120 °C ; RUNNING ACCURACY: Tolerance class P0/PN2 / ...

David worked on the road.cc tech team from 2012-2020. Previously he was editor of Bikemagic.com and before that staff writer at RCUK. He's a seasoned cyclist of all disciplines, from road to mountain biking, touring to cyclo-cross, he only wishes he had time to ride them all. He's mildly competitive, though he'll never admit it, and is a frequent road racer but is too lazy to do really well. He currently resides in the Cotswolds, and you can now find him over on his own YouTube channel David Arthur - Just Ride Bikes.

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Hybridceramic bearings

For example - full set of 4 replacement bearings for Hunt Sprint hubs £25 (from Hunt). Full set of ceramic ones from Random online bearing store £37.

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Leading industry wheel dynamics expert and CEO of Edco Wheels , Paul Lew, backs this up and reckons it makes ceramic bearings a poor choice for hubs and headsets, also adding that they offer no weight savings and are only beneficial in environments where high rpm (revolutions per minute) are required.

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Also I'd add to anyone who has never span a decent steel bearing between their fingers without grease, give it a go, it's not dissimilar to the ceramic ones without grease we are told are so much better'er.

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Could it be because there's more lever advantage over a smaller diameter bearing? Heavier cranks giving more angular momentum when spun?

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Then the ceramic wheel bearings in the super-lightweight hubs went as rough as a badger's proverbial - he spoke to several bearing suppliers and they all explained that the ceramic bearings were too hard - fine for a pro and a single use time trial, useless for on the road where the mismatch in hardness caused the steel surface to pit.

“For bottom bracket applications, the maximum sustained rpm may be 130,” explains Lew. “For wheel hub applications, the maximum rpm may be 500 – 600 revolutions per kilometer (depends on wheel/tyre diameter). The maximum rpm values in cycling are far below the typical ideal rating for ceramic bearings which is 10,000 rpm+.”

“We have looked at ceramic bearings in the past and talked them over with our bearing suppliers,” explains Hope’s Alan Weatherill. “They do run with less friction, which offers a significant advantage in industrial applications running at 20,000 rpm. A tiny percentage reduction in friction here can equate to a worthwhile power saving, but when you're only turning at 300 rpm, as you do on a bicycle a small percentage increase in efficiency will make a negligible change to your power output. Certainly not worth the significant increase in cost."

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Then there is the fact that ceramic bearings aren’t cheap. CeramicSpeed’s BSA Road external bottom bracket for threaded frames costs £298. A Shimano Dura-Ace 9000 bottom bracket cost £39.99, much less if you shop around. A CeramicSpeed bearing upgrade kit for Campagnolo and Fulcrum wheels will set you back £120, and Zipp charges £194 for a CeramicSpeed bearing kit for its wheels. That makes upgrading to ceramic bearings a serious investment, fine for a professional cycling team, less so for a privateer racer.

20-30 years ago, people griped that the bike industry was trying to stop us buying good old 531-framed bikes. Why would anyone want to pay so much extra for soulless aluminium?

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Ceramic bearings vs steelreddit

Needed something that would accommodate my Shimano cranks with no adapters, there's a little less friction but I honestly don't notice while riding.

CeramicSpeed is a Danish company, founded in 2007, that specialises in supplying high-quality ceramic bearings to the cycling industry, and is a favourite of many professional cycling teams - you don’t have to look far to spot the telltale company sticker on any frame or hub fitted with the bearings. It’s seen a massive shift in the last two years with more customers keen to take up the ceramic advantage. The advantage, according to the company, is a saving of up to 9 watts with CeramicSpeed bearings in the hubs, jockey wheels and bottom brackets compared to a set of standard bearings

An interesting (if your a bit of a boring geek like me) compromise between steel bearings and ceramics would be to have a DLC (diamond like coating) applied to steel bearings, I've had this done for motorsport applictaions in the past and it's much cheaper than switching to ceramics which can cost £4K a corner for race car wheel bearings!

No idea if Cancellara was using a motor or not, I hope not as I greatly enjoyed him as a rider, but the tech was certainly available, I can...

A couple of weeks ago I put in a 29 year old Campag Croce d'Aune (second tier) bottom bracket in a classic bike I'm building up.

Good article with some relevant contributions from people with proper subject knowledge (Hope and Reynolds). Their comments are spot on.

I remember arguments that nobody needs a stupid status purchase like clipless pedals or an 8-speed cassette; after all, Eddy Merckx won the TDF without such fripperies.

Because wheel bearings are performing so much work, after driving for thousands of miles, they can wear out. Constant revolutions paired with the weight of the vehicle causes wear to even top of the line bearings. In older cars, wheel bearings were a set of narrow roller bearings on a non-drive wheel or a straight bearing that supports the axle of the drive wheel. Vehicles today, however, are equipped with a sealed unit bearing that is bolted or adhered to the hub or knuckle. The unit is sealed to keep contamination out and prevent premature wear and cannot be serviced. This can also be a drawback as they cannot be cleaned or greased. Once the unit is worn, the whole bearing and sometimes the hub must be replaced.

When a vehicle receives an alignment, a technician will check three different angles of the vehicle’s alignment in order to properly align the wheels. These three angles include: camber, toe, and caster.

I'm fighting an internal battle daily to keep it as the toy he loves and not hack it into my collection of Pieces of Stupid Shit I Don't Properly Understand And Shouldn't Have Starteds currently on my garage worktop.

“Another issue with using them [ceramic bearings] on bicycles is their hardness,” says Weatherill. “While this again is an advantage in many industrial applications, it's a major drawback on bikes. The shocks from hitting potholes and other road blemishes impact the hard ceramic balls into the softer steel races commonly used. This dent in the race is then felt when the bearing is rotated, giving you rough bearings.”

Weatherilll and Lew are measured in their scepticism about the overall benefits of ceramic bearings. Rather more forthright is Sachin Hambini of Hambini Engineering. An aerospace engineer who has built up a cult following for his scathing criticism of the quality of manufacturing in the bike industry, especially where press-fit bottom brackets are concerned.

Not too long until she discovers the challenge of getting a driving licence, getting her own brum and how driving everywhere can give her even...

Ceramic bearings vs steel vsstainlesssteel

“The second advantage of ceramic bearings over stock steel bearings is their performance under load in reducing drag. Performance cyclists are performance driven and all data shows that the best performing bearings for reducing drag are ceramic bearings.”

The single biggest issue when specifying bearings for bikes is the trade-off between sealing efficiency and low drag. Generally you can't have both.

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The majority of ceramic bearings manufactured globally are hybrids; metal rings with ceramic balls. These are typically used in high speed, low load applications such as machine tool spindles. As ceramic has a lower mass than steel the centrifugal forces generated by ceramic balls at very high speeds are significantly lower than for steel balls. As a result ceramic hybrids runs cooler with less drag. However these effects are not measureable at speeds associated with cycling.

“A lot of bearings can spin well in the hand but that by itself is not enough,” says Banke. “It is really about the performance of a bearing under load, both drag reducing performance and lifetime performance. We are now starting to see a 'shift in the seas', a common understanding that ceramic does last and is very advantageous if of a high enough quality.”

The premium for ceramic bearings is high then, and their advantages, while looking promising in an ideal world, appear to stack up much less in the demanding environment that a bicycle is expected to perform and survive in. So should you choose ceramic bearings? We’ll let Paul Lew have the last word.

Alignment refers to the geometry of the entire suspension system. The system is comprised of control arms, steering components, and mounting points designed to fit in exact places. Perfect geometry is vital to ensure all four tires work together, meaning they need to be able to rotate in the same direction at the same speed. Once parts of this system fall out of place, even slightly, the alignment of the suspension is changed. Poor alignment can result in accelerated tire wear or damage. Due to the vulnerabilities of the metal components in the make-up of the system, hitting potholes or curbs can change the shape, pushing the alignment out of place. Additionally, joint components and rubber bushings deteriorate making them ineffective.

Most sealed ceramic bearings are actually hybrid ceramic bearings, which combine a steel race with ceramic ball bearings. Full ceramic bearings use ceramic races, which can be lighter and provide the lowest friction, but come at a durability cost. Unsealed ceramic bearings can be used to upgrade components that don’t use cartridge type bearings, like cup and cone hubs.

I have S-Works venge 2019 just found out today by contacting ceramic speed service on wheel bearings 1000km to 1500km so about every 2 weeks . R S Hope hubs on wheelsmith wheels over 2 year still spin very free ceramic bearings gritty when wheel held.

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