Bicycle Handlebar Spacer 31.8 to 35

Stem Spacer Adapter 31.8 → 35 mm

Adapter spacer for installing a 35 mm handlebar into a 31.8 mm stem clamp.
Designed for 3D printing and suitable for custom builds, fitment testing, temporary solutions, and DIY projects.

Features

• Converts 31.8 mm stem clamp to 35 mm

• Split design for easy installation

• Simple and lightweight construction

• Compatible with most standard MTB / enduro stems

• Optimized for FDM printing

Print Recommendations

• Material: PETG / ABS / ASA

• PLA is not recommended for long-term use

• Infill: 80–100%

• Layer height: 0.2 mm

• 4–6 walls/perimeters

• Print in an orientation that maximizes layer strength

Important

This part is used in a high-load bicycle component.
Use at your own risk. Always inspect the part for cracks, deformation, or looseness before riding.

For aggressive riding, engineering-grade materials and regular inspection are strongly recommended.

Dimensions

• Inner diameter: 31.8 mm

• Outer diameter: 35 mm

I’d love to see your makes and feedback 🙂