The Kogel BB90 GXP Bottom Bracket Kit is a premium ceramic bearing upgrade designed specifically for Trek frames using the BB90 standard. This kit allows you to run SRAM GXP cranks with unparalleled smoothness, utilising Kogel’s high-quality ceramic balls and road-specific seals to reduce friction and increase longevity on the tarmac.
High-Grade Ceramic Balls: Featuring silicon nitride (Si3N4) balls that are harder, smoother, and more spherical than steel, significantly reducing rotational drag in the drivetrain.
Road-Specific Seals: Engineered with "Road" seals that provide a minimal-contact barrier to keep contaminants out while offering the lowest possible rolling resistance.
GXP Compatibility: Specifically designed to adapt the BB90 frame shell to the stepped spindle of a SRAM GXP crankset (24mm drive side / 22mm non-drive side).
Direct-Fit Design: These bearings are designed to be pressed directly into the carbon shell of Trek Madone, Domane, and Emonda frames, ensuring a precise and creak-free interface.
Corrosion Resistant: Ceramic balls are impervious to rust, making them exceptionally durable for riders who frequently train in humid or damp coastal environments.
Reduced Mechanical Loss: By replacing standard steel bearings with Kogel Ceramics, you save valuable watts, making your pedaling feel more effortless during long-distance efforts.
| Feature | Specification |
| Bearing Type | Ceramic Hybrid |
| Frame Standard | BB90 (Trek Specific) |
| Crank Compatibility | SRAM GXP (24mm/22mm) |
| Seal Type | Road (Low Friction) |
| Application | Road / Triathlon |
| Material | Hardened Steel Races / Ceramic Balls |
✅ Trek Performance Upgrade: The single best mechanical upgrade for a Trek rider looking to squeeze every bit of efficiency out of their BB90-equipped frame.
✅ SRAM Drivetrain Users: Essential for those who prefer the feel and weight of SRAM GXP cranks but are limited by the BB90 frame shell requirements.
✅ Watt Chasers: Ideal for competitive racers and TT specialists where reducing drivetrain friction is a priority for overall speed.
❌ Off-Road Use: If you primarily ride gravel or in extremely muddy conditions, Kogel’s "Cross" seals (which have more drag but better protection) would be more appropriate than these "Road" versions.
❌ Budget Replacements: Ceramic bearings are a high-end performance investment; riders seeking a simple, low-cost fix may prefer standard steel alternatives.
When installing Kogel BB90 bearings, cleanliness is absolutely paramount. Because the bearings press directly into the carbon frame, ensure the bottom bracket shell is completely free of old grease and grit before installation. We recommend using a high-quality waterproof grease on the outer race to prevent any potential "carbon-on-metal" creaking. Also, remember that ceramic bearings don't need a "break-in" period—they are at their fastest from the very first pedal stroke!
