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CeramicSpeed spins up 14-tooth derailleur pulley wheels for SRAM Eagle

ceramicspeed sram eagle derailleur pulley wheels or jockey wheels with ceramic bearings
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ceramicspeed sram eagle derailleur pulley wheels or jockey wheels with ceramic bearings

Upping the count from their original 14/12 tooth pairs for other derailleurs, the new CeramicSpeed 14-tooth Eagle pulley wheels put equal numbers on both parts.

They say, compared to the 14/12 version, they say these offer a further 20% watts savings (34.4% total reduction compared to stock wheels), and it’s not just their words. They tested it with Specialized Racing athletes, switching back and forth between 12 and 14 tooth upper pulley wheels, but everyone preferred the larger setup.

“As already proven by the OSPW system on the road, larger diameter pulley wheels reduce friction by limiting the amount of rotation experienced by each chain link as it passes,” explains Brad Copeland, mechanic at Specialized Racing, via press release. “Combined with the precision machining and incredibly high quality bearings inside, the new 14/14-tooth Eagle pulleys are the final piece of drivetrain perfection to get the absolute most out of our mountain bike drivetrains. In addition, the machined alloy pulleys are stiffer and therefore enhance shifting feel and give a more precise and instant engagement than we have experienced with stock pulleys before.”

Available in black or gold, alloy or titanium, with two bearing options…

ceramicspeed sram eagle derailleur pulley wheels or jockey wheels with ceramic bearings

The outer wheels are aluminum alloy that’s designed to be low friction but long lasting. Both upper and lower wheels use a narrow-wide profile to aid in chain management. The lower stock wheel uses a narrow-wide design for retention, but the top is typically a standard tooth profile. CeramicSpeed says they used it on both because it led to crisper shifting. Unlike with their complete OWPS systems that come with an elongated cage, these are sold as just the wheels.

For $379, you get your choice of black or gold (the latter not available until October 2017) with hardened stainless steel bearing races. Upgrade to the coated version and you’ll get ceramic coated races that are 75% harder and less vulnerable to corrosion…for $489. Available now. There’ll also be a titanium version, price and availability TBD which will run $679 for the standard version and $765 for coated.

CeramicSpeed.com

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25 Comments
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Dave
Dave
6 years ago

The search for wealthy fools continues.

Shafty
Shafty
6 years ago

If you use these, and you’re not a skilled racer with a chance of placing, you’re a fool. Welcome to gimmick city, folks. Next stop.. Paraffin Tow.. oh… wait…. dang.

Robin
Robin
6 years ago
Reply to  Shafty

So you’re saying that no one in the pro peloton is using pulleys with ceramic bearings or specifically Ceramic Speed pulleys.

dypeterc
6 years ago
Reply to  Shafty

Katie F*ckin’ Courtney just won U23 at MSA on these specifically

mnorris122
6 years ago

If you use ceramic bearings at all you’re an idiot. Absolutely no benefits at the low speeds bicycle bearings see.

stansmonster
stansmonster
6 years ago
Reply to  mnorris122

Except that ceramic doesn’t rust and can’t be worn down by grit, so reduced maintenance costs and never needing to replace them is a benefit.

Chase
Chase
6 years ago
Reply to  stansmonster

Maybe the ceramic balls don’t rust but the races do. The Ceramic Enduro BB I have took a bunch of power washes before I checked it. Almost lost it but the races were rusting and would have failed had I not caught it. So ceramic as a fail safe for corrosion is a misnomer.

Penn Teller
Penn Teller
6 years ago
Reply to  stansmonster

You realize, I hope, that buying $489 pulleys for the “reduced maintenance costs” is absurd.

These aren’t even ceramic bearings, according to the article. They’ve got “ceramic-coated races.” If the basic $379(!) stainless races are corroding, then you’re somehow riding up to your axles in sulfuric acid, in which case pulley race corrosion is the least of your worries.

JBikes
JBikes
6 years ago
Reply to  stansmonster

Ceramic is worn down by grit. Not as quick, but it still happens.

Veganpotter
Veganpotter
6 years ago
Reply to  mnorris122

Not even close to true for BB and pulleys. Their benefit is very measurable

mnorris122
6 years ago
Reply to  Veganpotter

Maybe if they’re run dry. Once you add any sort of decent grease, the drag from the grease makes any friction reductions so negligible you should just run steel bearings

Nastran
Nastran
6 years ago

$765 for pulley wheels… who is stupid enouth to buy this to save 0.0001 Watt.
You can have a pair of carbon wheels for this price.

xcracer
xcracer
6 years ago

I see a lot of % savings or % increase in this post. I feel like that’s because if they used the real values, everyone would realize how infinitesimally small the gains actually are and would never spend that kind of money for those gains.

Also – $765 for ceramic coated titanium…. It doesn’t matter how precise the CNC machines they are using are, or how premium their ceramic coating is, or how premium their base stock titanium is, etc, etc – they are raking in the profits….

Robin
Robin
6 years ago
Reply to  xcracer

Or it could be because bearing drag varies linearly with speed (if I remember correctly), so giving “%savings or increases” would apply no matter the speed.

Robin
Robin
6 years ago
Reply to  Robin

That should read that power consumed by bearing drag varies linearly with angular velocity.

Technician
Technician
6 years ago

P. T. Barnum was right.

Frank
Frank
6 years ago

I loaded this page just so I could balk at the price. My expectations have been wildly exceeded.

Wiscomark
Wiscomark
6 years ago
Reply to  Frank

Same here!

Tim
Tim
6 years ago

You only need a handful or rich idiots to make a profit from this, so they might well succeed in making money.

Hexsense
Hexsense
6 years ago

Okay, regular pulley produce around 1.8 watts total for both upper and lower.
Reduce that by 34.4% means 0.6192 WATTS reduction.
Is that noticable? probably. What about increased aero resistance from bigger pulley against the wind?

Veganpotter
Veganpotter
6 years ago

Ha, I’m actually surprised how “cheap” these are coming from CeramicSpeed

Luke Dordai
6 years ago

SEVEN HUNDRED AND F*%($CKING SIXTY FIVE DOLLARS FOR CERAMIC PULLEY WHEELS.

ON A MOUNTAIN DRIVETRAIN

THAT WILL GET WORN OUT JUST AS QUICKLY AS STOCK STEEL.

MM
MM
6 years ago

Hawk Racing pulleys ppl…. As good as they come and no gimmickry.

blah blah blah
blah blah blah
6 years ago

narrow wide on pulleys ffs you need that give/slop to help align your chain line, yeah so great they’ll help knacker your drivetrain in no time , (deleted)

Matt
Matt
6 years ago

I know people who will buy these. KCNC or Absolute black will be selling the same thing for $20-50 in a month.

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