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BBinfinite Ceramitech composite derailleur pulleys get oversized, no mech mod needed

12 tooth oversize ceramic bearing derailleur pulleys for shimano road bike rear derailleurs
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OK, so there’s only one extra tooth on the new BBinfinite Ceramitec Delrin pulley wheels, but if you’re looking at these products, you’re all about the incremental gains, right? Originally launched in 2016 with 11 teeth per wheel, the new 12-tooth derailleur pulley wheels keep the quiet, chain-friendly Delrin composite construction and free-spinning Ceramitech hybrid ceramic bearings.

The wheels’s Delrin material is a fiber-reinforced composite that’s stiff for improved shifting response, but won’t wear down the chain or add noise like alloy (or ti) wheels might. The bearings are molded into the wheel during manufacturing, too, for a more durable construction. They’re available in Red and Black for Shimano (105 R7000, Utegra 6800 and 8000/8100, and Dura-Ace 9000/9100) derailleurs. They say the extra tooth doesn’t add too much diameter, so these will fit in your stock derailleurs with no cage modification needed.

Retail is $140, but they’re 40% off during Black Friday weekend through Cyber Monday.

BBinfinite.com

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Tyni Tyres
Tyni Tyres
6 years ago

I seriously question if something like this can make a real difference. If it could, I’m sure the big buys would have incorporated them in their products. But, hey, if you like the look of them and they give you pleasure go for it.

TobinGestatesYou (@TobinHatesYou)
Reply to  Tyni Tyres

With the sale price, they cost significantly less than OEM eTap pulley wheels, so I guess it doesn’t even matter if the gains are microscopic.

Bmx
Bmx
6 years ago

So the G pulley that these replace has side to side play to allow the chain to have a bit of freedom to line up on the cog. I understand that the g pulley works well and is patented. How do these do the same job without that essential bit of play? Thinner teeth may work on a perfectly clean chain but any crud in there and it affects play.

Greg
Greg
6 years ago
Reply to  Bmx

Most Shimano upper pulleys no longer have a floating upper bearing. Dura Ace 9000 kinda does (top and bottom, weird), r8000 nope, gotta look at the rest to remember what is what

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