How to Install a Bottom Bracket: Square Taper vs Press-Fit

Introduction

This guide breaks down what actually matters — based on real-world mechanic experience, not marketing.

Key Points

Before diving in: the most common mistakes cyclists make are skipping torque wrenches, assuming "it'll be fine," and not cleaning bearing surfaces before install.

Step-by-Step

1. Document your current setup with photos
2. Check frame BB shell for oxidation or damage
3. Apply assembly grease — not lubricant — to bearing surfaces
4. Torque to spec (usually 35-50 Nm for cranksets)
5. Test spin before riding — listen and feel for smoothness

Common Mistakes

Over-tightening crushes bearings and creaks. Under-tightening lets parts move. A $50 torque wrench prevents a $300 mistake.

FAQ

How often should I service this? Annual inspection, full rebuild every 20,000-30,000 km for most riders.

Do I need a professional? If you're unsure about torque specs or your frame's standard, yes — a BB service is $50-150. Worth it vs frame damage.

Our Take

Quality parts properly installed outperform expensive parts poorly installed. Take your time, use a torque wrench, and document everything.