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BBright46 for SRAM GXP

  • Frame type ?
    Frame type

    The frame type describes the bottom bracket shell standard. This standard is often listed in the manufacturer's bike specifications, but it can also be determined by measuring several dimensions of the bottom bracket shell, such as the width and inner diameter.

    The values at a glance:

    • BSA — the cups are screwed directly into the frame with a 1.37″ × 24 thread. The bottom bracket shell is 68 mm (road) or 73 mm (MTB) wide.
    • ITA — the cups are screwed directly into the frame with a 36 × 24 thread. The bottom bracket shell is 70 mm wide.
    • T45 — the cups are screwed directly into the frame with an M45 × 1 thread. The bottom bracket shell is 82.5 mm wide.
    • T47 Outboard — T47 standard in which the bearings sit in cups outside the frame. The bottom bracket shell is 68 mm (road) or 73 mm (MTB) wide. The cups are screwed directly into the frame with an M47 × 1 thread.
    • T47A — asymmetric T47 variant with a bottom bracket shell width of 77 mm. The cups are screwed directly into the frame with an M47 × 1 thread.
    • T47 TREK / Inboard — T47 standard in which the bearings sit in cups inside the frame. The bottom bracket shell is 85.5 mm wide. The cups are screwed directly into the frame with an M47 × 1 thread.
    • BB30 — press-fit standard in which the bearings are fitted directly into the frame. The bottom bracket shell is 68 mm (road) or 73 mm (MTB) wide. Our Interlock bottom brackets also allow other crank types to be fitted.
    • BB30A — asymmetric variant of BB30 for road frames, used by Cannondale. On the non-drive side the bottom bracket shell is 5 mm wider than with BB30.
    • BB86/BB92 — widely used press-fit standard with a bottom bracket shell width of 86.5 mm (road) and 92 mm (MTB) respectively. Also called PF86.5 or PF92. The bearings sit in cups. This standard is used by Giant, Canyon, BMC, Cube and other brands.
    • BB89 — variant of BB86/BB92 with a bottom bracket shell width of 89.5 mm.
    • BB386 — press-fit standard with a bottom bracket shell width of 86.5 mm and an inner diameter of 46 mm. The large inner diameter of the shell makes the standard suitable for various crank axle diameters.
    • BB90 / BB95 — Trek-specific press-fit standard in which the bearings are fitted directly into the frame, without separate cups. The bottom bracket shell is 90.5 mm (road) or 95.5 mm (MTB) wide.
    • PF30 — press-fit standard with an inner diameter of 46 mm. The bottom bracket shell is 68 mm (road) or 73 mm (MTB) wide. The bearings sit in cups that are pressed into the frame.
    • PF30A — asymmetric variant of PF30 for road frames, used among others by Cannondale. On the non-drive side the bottom bracket shell is 5 mm wider than with PF30.
    • OSBB — Specialized Over-Sized Bottom Bracket; a former Specialized standard with a narrow 61 mm bottom bracket shell.
    • BBright42 — asymmetric press-fit standard by Cervélo with a bottom bracket shell inner diameter of 42 mm. The shell is widened by 11 mm towards the non-drive side relative to the centreline.
    • BBright46 — asymmetric press-fit standard by Cervélo with a bottom bracket shell inner diameter of 46 mm. The shell is widened by 11 mm towards the non-drive side relative to the centreline.
  • Crank type ?
    Crank type

    The crank type indicates which type of bottom bracket axle (spindle) your crankset uses. Different brands and systems use different diameters and designs. Choosing the right crank type ensures a correct fit and proper functioning of your bottom bracket.

    The values at a glance:

    • Shimano — 24 mm axle; also suitable for other cranksets with a 24 mm axle.
    • SRAM GXP — 24 mm axle that steps down to 22 mm (stepped spindle) on the non-drive side.
    • SRAM DUB — 28.99 mm axle; also suitable for DUB WIDE and SL and other cranksets with a 28.99 mm axle.
    • FSA386/Rotor 30mm — all modern cranks with a 30 mm axle.
    • CAMPA UT — Campagnolo Ultra-Torque: two-piece 25 mm axle with a Hirth joint in the middle.
    • PRAXIS M30 — 30 mm axle that steps down to 28 mm (stepped spindle) on the non-drive side.
    • BB30/PF30 — older standard with a short 30 mm axle. Only suitable for BB30 and PF30 frames.
  • Frame width ?
    Frame width

    The frame width is the width of the bottom bracket shell of your bike frame. Measure the width of the bottom bracket shell, without any cups fitted, and then select the matching size. Together with the frame inner diameter, this is an important parameter for determining the exact type of bottom bracket shell.
  • Frame Inner Diameter ?
    Frame Inner Diameter

    The frame inner diameter is the internal diameter of the bottom bracket shell of your bike frame. Measure the internal diameter of the bottom bracket shell and then select the matching size. Together with the frame width, this is an important parameter for determining the exact type of bottom bracket shell.
  • Mounting system
  • Colour
  • Bearing type ?
    Bearing type
    • Stainless Steel

      A stainless steel bearing is made entirely of stainless steel, both the rings and the balls. Thanks to its excellent corrosion resistance, this bearing is particularly suitable for bikes exposed to moisture, rain, dirt and other weather conditions. The stainless steel bearing offers a reliable and durable solution for a wide range of cycling applications and combines good performance with an attractive price.

    • Ceramic

      A hybrid ceramic bearing combines steel rings with silicon nitride (Si₃N₄) ceramic balls. The ceramic balls are lighter and harder than steel balls, which provides lower rolling resistance, smooth running and a longer bearing life. This makes the bearing very suitable for sporty, performance-oriented bikes, where efficiency and durability matter.

    • SG3 - Ceramic - COATED

      A coated hybrid ceramic bearing combines steel rings with ceramic balls and a special coating on the rings. The ceramic balls provide smooth running, low friction and high wear resistance. The coating increases the resistance of the rings to oxidation and corrosion, making the bearing more resistant to moisture and external influences. This contributes to a longer service life and reliable performance, even in demanding conditions.
  • Frame ?
    Frame

    The frame attribute describes the type of bottom bracket shell of your bike frame. It indicates how the bottom bracket is mounted in the bottom bracket shell of the frame.

    The values at a glance:

    • Threaded — in a threaded frame, the bottom bracket shell has an internal thread into which the bottom bracket is screwed.
    • Pressfit — in a press-fit frame, the bottom bracket shell has a smooth inner surface into which the bottom bracket is pressed.
SRC-BT-RPF3024BR-SS
124.90 € 124.90 € (Tax included)
(Tax excluded)

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Documents
Installation manual (PDF)

Description

Precision, stiffness and lasting performance for SRAM GXP cranksets.

The CEMA Interlock BBright46 Bottom Bracket for SRAM GXP is developed for cyclists and professionals who set high standards for reliability, precise fitting and smooth, efficient running. This bottom bracket lets you fit a SRAM GXP crankset without any hassle in a frame with a BBright46 bottom bracket shell.

The bottom bracket fits frames with a 79 mm wide bottom bracket shell and an inner diameter of 46 mm.

Interlock thread-together system

This bottom bracket is part of the CEMA Interlock range and uses the innovative Interlock system. Instead of two separate cups, the left and right cups are threaded together and then locked firmly in the frame.

This thread-together construction gives a stiffer and more precisely aligned fit than traditional systems with separate cups. Because both cups are connected, forces and loads are spread more evenly over the bottom bracket. This helps to limit play, unwanted creaking and premature wear.

The Interlock system also makes installation simple and precise, so the bottom bracket keeps working reliably and steadily in the long run.

Efficient power transfer

Thanks to the precise fit and high-quality bearings, the crankset turns smoothly and efficiently. The CEMA Interlock BBright46 is designed for optimal power transfer and durable, creak-free running – from everyday use to intensive training and racing.

Depending on your riding style, use and personal preference, this bottom bracket is available with different bearing types, so you can choose the version that best suits your needs.

Key features

  • Fits SRAM GXP cranksets
  • For BBright46 frames
  • Fits a 79 mm wide bottom bracket shell
  • For frames with a 46 mm inner diameter
  • CEMA Interlock thread-together system
  • Stiff and precisely aligned fit
  • Efficient and smooth power transfer
  • Reduces the risk of play and creaking
  • Designed for a long, reliable service life
  • Available with different bearing types

Specifications

Frame type BBright46
Crank type SRAM GXP
Frame width 79 mm
Frame Inner Diameter 46 mm
Frame Pressfit
Mounting system Interlock
Colour Black
Bearing type Stainless Steel
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