MBK stem 90 mm 1"1/8 OS

90 mm stem: a key element for an optimized bike cockpit

The bike stem is an essential component of the cockpit. It connects the handlebar to the fork steerer tube, directly influencing handling, comfort, and the rider’s position. Among the various sizes available, the 90 mm stem stands out for its balance between responsiveness and stability, making it an ideal choice for many types of bikes.

Why choose a 90 mm stem ?

The length of the stem plays a crucial role in a bike’s behavior. A short stem (below 80 mm) provides more responsive and agile steering, ideal for aggressive mountain biking. Conversely, a long stem (over 110 mm) promotes a more stretched-out and stable position, suitable for road bikes. The 90 mm stem is an excellent compromise for those looking for a balance between maneuverability and comfort.

It is often recommended for:

• Cross-country MTB and light trail bikes, where a balanced position is crucial.
• Gravel bikes, combining agility and control.
• Endurance road bikes, ensuring a mix of performance and comfort.

Features of a 90 mm stem

The materials and design of a stem influence its weight, strength, and rigidity. Common options include:

• Aluminum: lightweight, strong, and affordable, making it ideal for versatile use.
• Carbon: even lighter and better at absorbing vibrations, perfect for competition.
• Steel: less common, often used on vintage or urban bikes.

Angle and tilt

The angle of a stem also affects the handlebar position. A 90 mm stem with a 6° angle will be relatively neutral, while a + or - 17° angle allows for a more upright or aerodynamic position depending on the rider’s needs.

Clamp diameter

• 31.8 mm: the current standard on most modern bikes.
• 25.4 mm: older standard, found on urban and some mountain bikes.
• 35 mm: mostly used in enduro and downhill MTB for increased rigidity.

How to choose the right 90 mm stem?

To find the ideal stem, consider:

• Your riding discipline (road, MTB, gravel…)
• The handlebar and steerer tube diameter to ensure compatibility.
• The angle and height desired for an optimal position.

Installation and adjustment

Installing a 90 mm stem is a relatively simple process. Just:

1. Remove the old stem by loosening the bolts on the steerer tube and handlebar.
2. Place the new stem and gradually tighten it, following the recommended torque settings.
3. Check alignment and test the position before riding.

Conclusion

Whether you want to improve comfort, handling, or ergonomics, a 90 mm stem is an excellent choice for many cyclists. Its balance between agility and stability makes it a versatile solution, ideal for MTB, road, and gravel bikes. By choosing a model suited to your riding style and body type, you’ll optimize your riding experience while ensuring an optimal position.