48 Hours Only—Buy Castelli Bibs, Get a Free Castelli Jersey »
  • Free Shipping on orders over $50*
  • 100% Guaranteed Returns

SRAM GXP Blackbox Ceramic Bottom Bracket

$124.99 $199.95

Item # SRM0372 37% Off

3 5

Community Rating | 2 Reviews

Select options
  • Select options
  • One Color, 68 ($124.99)
  • One Color, 70 ($124.99)
  • 100% Guaranteed Returns

  • Free Shipping

    on orders over $50
Item # SRM0372

Description

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

Material:
alloy
Threading:
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

Reviews & Community

What do you think of the

SRAM GXP Blackbox Ceramic Bottom Bracket

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(Optional)

Only jpg, jpeg, png, gif or bmp files please.

Save

Here's what others have to say...

5 5

Excellent

  • 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.