Bike Gear Inch Calculator For Single Speed Common Wheel Sizes 700x23c 700x28c 700x35c 26″ MTB Chainring Rear Cog Wheel Dia (In) Cadence (RPM) Crank Length (mm) Ratio– Skid Patches –– Gear Inches –– Gain Ratio –– Speed (MPH / KMH)– / – Professional Gear Inches Table Values in Red are considered outside normal riding ranges. Chainrings (20-70): Sprockets (8-60): Rim Size (ISO): 700c / 29in (622mm) 650b / 27.5in (584mm) 26in MTB (559mm) 20in BMX (406mm) 16in Brompton (349mm) Tire Width (18-70mm): Generate Gear Chart Bike Gear Inch Calculator Here is our Bicycle Gear Inches Calculator