How to Use Bike Gears: A Complete Guide for 6- and 18-/21-Speeds
Introduction to Bike Gears
Knowing how to properly use your bike’s gears is essential for efficient pedaling, reducing fatigue, and preserving your bike’s components. Whether you have a city bike with 6 speeds, or a city or mountain bike with 18 or 21 speeds, this guide will help you master the art of gear shifting.
6-Speed Gear System: Simplicity and Efficiency
How It Works
The 6-speed gear system is typical of city bikes and features a single shifter on the right handlebar controlling the rear cogset. It’s the ideal solution for those cycling in cities like Florence, where climbs are moderate and simplicity is an advantage.
When to Shift Gears
- Low gears (1-2): Perfect for starts, steep climbs like the one to Piazzale Michelangelo, or when pedaling against the wind
- Medium gears (3-4): Ideal for pedaling on flat terrain in Florence’s historic center
- High gears (5-6): Great for descents or when you have a tailwind along the Arno
Practical Tips
- Always shift gears while pedaling, but slightly ease pedal pressure during the shift
- Anticipate the shift: shift before tackling a climb, not during
- Avoid shifting gears while stopped: risk of damaging the derailleur
21-Speed Gear System: Maximum Versatility
How It Works
The 21-speed system combines 3 front chainrings (left shifter) and 7 rear cogs (right shifter). This setup offers 21 different combinations, perfect for mountain bikes and trekking bikes tackling varied terrain.
The Three Front Chainrings
- Small chainring (1): For steep climbs and difficult terrain - easiest pedaling
- Medium chainring (2): For general use on flat and moderate climbs - the most used
- Large chainring (3): For high speeds on flat and downhill - maximum power
The 7 Rear Cogs
- Large cogs (1-3): Agile gears for climbs
- Medium cogs (4-5): Balanced gears for flat terrain
- Small cogs (6-7): Hard gears for speed
The Golden Rule: How to Combine Gears
Recommended Combinations
- Steep climb: Chainring 1 + Sprockets 1-3
- Moderate climb: Chainring 2 + Sprockets 2-4
- Flat terrain: Chainring 2 + Sprockets 4-6
- Descent/speed: Chainring 3 + Sprockets 5-7
Combinations to Avoid
Avoid cross-chaining, that is:
- Chainring 1 (small) + Sprocket 7 (small)
- Chainring 3 (large) + Sprocket 1 (large)
These combinations cause premature wear of the chain and components.
Perfect Shifting Technique
- Always shift while pedaling - never while stopped
- Reduce pedal pressure at the moment of shifting
- Shift one gear at a time - avoid multiple jumps
- Anticipate the terrain - shift before the climb, not during
- Maintain a steady cadence - about 60-80 pedal strokes per minute
- Use mainly the rear gears for fine adjustments
- Change the front chainring only for significant slope changes
Common Mistakes to Avoid
- Shifting under load: Damages the gears and chain
- Watching the gears while pedaling: Dangerous in city traffic
- Always using the same gear: Strains muscles and joints
- Shifting too late: Loss of rhythm and increased fatigue
Gear Maintenance
To keep your gears efficient:
- Regularly clean the chain and sprockets
- Lubricate the chain every 100-200 km
- Check the gear cable tension
- Have your gears adjusted at the workshop at least once a year
Conclusion
Mastering gear shifting completely transforms your riding experience. Whether you have a 6-speed city bike to get around Florence or an 18/21-speed mountain bike for the Tuscan hills, remember: anticipate the terrain, always pedal while shifting, and maintain a steady cadence.
Do you need a gear adjustment or personalized advice? Visit Cicli Sergio Bianchi in Florence: our specialized workshop is at your disposal for maintenance, adjustments, and technical consultation.