Sram GXP BB104.5 press fit bottom bracket for MTB

Everything you need to know about the Sram GXP BB104.5 press fit bottom bracket: features, compatibility, and benefits

When it comes to smooth drivetrain performance and optimal power transfer, the bottom bracket is a key component. Among the many options available on the market, the Sram GXP BB104.5 press fit bottom bracket stands out for its precise design, durability, and compatibility with GXP cranksets. Let’s dive into the specifics of this essential part for MTB and road bike enthusiasts who value performance.

What is a press fit bottom bracket ?

First, a quick refresher: a press fit bottom bracket is a type of bottom bracket that installs directly into the bike frame without threading. The cups are pressed into the frame shell, hence the name press fit.

This system provides weight savings, better lateral stiffness, and simplified installation—provided the correct tools and frame standard are used.

A closer look at the Sram GXP BB104.5 press fit bottom bracket

The Sram GXP BB104.5 press fit is specifically designed for frames with a 41 mm internal diameter and a shell width ranging from 86.5 mm to 89.5 mm. It’s compatible with GXP cranksets (24 mm spindle on the drive side, 22 mm on the non-drive side). Here's a breakdown of its main technical features:

• Type: press fit bottom bracket (non-threaded)

• Compatibility: Sram/Truvativ GXP cranksets

• Frame internal diameter: 41 mm

• Shell width: 86.5 mm to 89.5 mm (BB86/BB89.5/BB90 standards)

• Spindle size: 24 mm (drive side) / 22 mm (non-drive side)

• Materials: high-strength composite cups / sealed cartridge bearings

• Sealing: bearings protected from moisture and dirt for increased longevity

• Installation: pressed into place using a dedicated press-fit tool

Key benefits of the Sram GXP BB104.5 press fit bottom bracket

This bottom bracket delivers excellent stiffness, ensuring efficient power transfer between the crank arms and drivetrain. Thanks to its high-quality sealed bearings, it offers smooth pedaling motion even in harsh riding conditions like mud, rain, or dust.

What makes this model stand out:

• Perfect compatibility with Sram GXP cranksets

• Lightweight and clean design (no threads)

• Outstanding protection against external elements

• Low maintenance due to durable bearing construction

• Quiet and fluid performance

Who is it for ?

The GXP BB104.5 press fit bottom bracket is ideal for MTB or road cyclists with frames that support the 41 mm press fit standard. It’s tailored for riders who demand reliability, performance, and efficiency from their drivetrain system.

In summary

The Sram GXP BB104.5 press fit bottom bracket is a trusted solution for those using GXP cranksets. With its press-fit mounting system, lightweight build, and sealed bearings, it’s a great choice for riders seeking a durable and efficient bottom bracket for off-road or on-road performance.

A technical upgrade worth considering if you want to boost your drivetrain's smoothness and reliability with minimal fuss.