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SRAM GXP Blackbox Ceramic Bottom Bracket

$169.99 $199.95 15% off

Item # SRM0372

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  • One Color, 68 ($169.99)
  • One Color, 70 ($169.99)
  • 100% Guaranteed Returns

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    on orders over $50
Item # SRM0372


Part of the allure of SRAM's Red component group is that it's designed and made with a pull-out-all-the-stops attitude, and that insistence on lighter, faster, better goes all the way to the bottom bracket. SRAM Red uses the GXP/Blackbox Ceramic Bottom Bracket. It's structurally identical to the Team GXP bottom bracket used in the Force group, except the Blackbox Ceramic GXP uses silicon nitride ceramic balls in the sealed cartridge bearings instead of the less expensive and significantly less round steel balls.

This greater roundness and superior hardness substantially reduces the mechanical drag of the bottom bracket as the crankarm spindle rotates through it. After aerodynamic drag, mechanical drag is the leading culprit in consuming the power you put into the pedals. Can you go faster with ceramics? The answer is a simple and emphatic yes.

SRAM's bottom brackets, while interchangeable between all SRAM cranksets, are brand specific -- meaning, they can only be installed with SRAM cranks. The key element that makes them different from a Shimano or FSA bottom bracket is that the left side bearing has a smaller diameter to mate with the stepped spindle of the SRAM crank. This design allows the inner race of the left side bearing to be captured between the crankarm and the spindle, effectively locating the crank. The right side bearing "floats" on the spindle handling only radial loads as you pedal. The SRAM design optimizes bearing load, minimizes drag, and gives you more durability.

The GXP/Blackbox Ceramic Bottom Bracket has alloy cups, anodized in Red, and is compatible with all SRAM road cranksets -- Red, Force, and Rival. It's available in your choice of English(68mm) or Italian(70mm) threading.

Tech Specs

English, Italian
Shell Width:
(English) 68 mm, (Italian) 70 mm
Actual Weight:
One Color, 68: 105g
Recommended Use:
super silky smooth spinning
Manufacturer Warranty:
2 years

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SRAM GXP Blackbox Ceramic Bottom Bracket

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Here's what others have to say...

4 5

Solid Bottom Bracket

  • Familiarity: I've put it through the wringer

First of all, I probably should have read the product description in more detail because the product I received was the red anodized color (not the depicted silver color). However, color wasn't a huge issue for me. So I slapped this on my bike, and haven't regretted it yet. I can say this was a solid upgrade from the Sram GXP Team BB.

5 5


  • Familiarity: I've put it through the wringer

I'm not 100% sure what "breaking it in" means, but I've used ceramic BBs since they were available (one of the most cost effective upgrades you can make IMHO) and have owned one of these for years. It's worked flawlessly since day 1 and I wouldn't hesitate to recommend.

1 5

Don't buy!!

  • Familiarity: I've used it once or twice and have initial impressions

If you have loads of time on your hands to "break it in" then by all means spend the $200.00, otherwise do not buy it. My old BB was way better and in fact I just had the shop put it back in until I have time to burn breaking in this waste of money.