Basic Rule
- Lower teeth number: easier climbing, lower top speed
- Higher teeth number: faster on flat road, harder to climb steep hills Matched with mainstream cassette: 11-50T / 11-52T
Selection by Usage
- Off-road & steep hill riding Recommended: 30T / 32T Suitable for rugged terrain, frequent steep climbs.
- City commuting & casual riding Recommended: 34T / 36T Best balance for daily pavement riding.
- Fast cruising & gravel / flat bar road bike Recommended: 38T / 40T Ideal for flat roads and high speed riding.
Selection by Rider Condition
- Weak strength & short height: 30T / 32T
- Average rider all-round use: 34T (most versatile)
- Strong power & tall rider: 36T / 38T
Suitable Crowds & Scenarios for Single Chainring Over 40T
Basic Feature
Single chainring above 40T has larger gear ratio. It is harder to start and climb hills, but provides higher top speed and better high-speed cruising performance.
Suitable Riders
- Strong riders with excellent leg power
- Tall and heavy riders with stable pedaling strength
- Speed-focused commuters and long-distance flat road enthusiasts
- Experienced veteran cyclists and fitness training riders
Applicable Riding Scenarios
- Fully flat urban asphalt roads with no steep slopes
- Long-distance steady-speed cruising on plain roads
- Flat bar road bikes and city speed commuter bikes
- Circuit practice and casual speed training on flat ground
- Suburban leisure riding with only gentle slopes
Not Recommended
- Mountainous areas with frequent steep climbs
- Off-road trail and rough terrain riding
- Cycling beginners and riders with weak physical strength
- Daily riding with heavy loads
Size Reference
- 40T: Most popular large size for daily fast flat riding
- 42T: Pure flat road dedicated, higher speed limit
- 44T/46T: Extreme high gear ratio, only for professional flat speed riding
