Compare sprocket setups
Sprocket and chain comparison
CurrentNew
The diagram shows relative size only; it does not assess shaft centres, chain length or mechanical clearance.
Shorter gearing
15/45 → 14/47
Gearing change+11,9 %
Current ratio3,000rear ÷ front
New ratio3,357rear ÷ front
Theoretical wheel-torque change+11,9 %torque multiplication at the rear wheel
RPM at the same road speed+11,9 %compared with current
Speed at the same RPM−10,6 %compared with current
Equivalent rear sprocket15/50,4with the old front sprocket
Your speed and RPM
Check a specific riding point.
New theoretical speed89,4 km/h
New theoretical RPM6 714 RPM
Detailed gearing comparison
Exact mathematical differences between both setups.
| Measure | Current | New | Difference |
|---|---|---|---|
| Front sprocket | |||
| Rear sprocket | |||
| Final-drive ratio |
Speed at the same engine RPM
If you currently ride at the stated speed and RPM, the theoretical speed with the new gearing would be:
| Current speed | With the new sprockets | Difference |
|---|
Important: this is a mathematical comparison at the same engine RPM, not a guaranteed top speed. Real results depend on engine output, gearing, tyre size, aerodynamics, load and resistance.