What is the wheel circumference of a 700x28?

About 2,136 mm. A 700x25 is about 2,105 mm.

For long climbs and amateur riders a compact (50/34) gives easier gearing; a standard (53/39) suits strong riders on flat roads.

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Gear ratio and speed calculator

Enter chainring, cog and cadence to see your speed and how many metres you travel per pedal stroke. Use it to choose the right cassette for your climbs.

Chainring teethCog teethCadence (rpm)Wheel circumference (mm)

Speed

16.0 km/h

Development

3.14 m

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What development means

Development is the distance travelled per pedal revolution: wheel circumference times the ratio of chainring to cog teeth. The higher it is, the harder the gear.

Choosing a gear for climbing

For long, steep climbs you want to hold 80-90 rpm even on the hardest sections. If your easiest gear drops you below 60 rpm, consider a larger cog or a smaller chainring.

FAQ

What is the wheel circumference of a 700x28?: About 2,136 mm. A 700x25 is about 2,105 mm.
Compact or standard?: For long climbs and amateur riders a compact (50/34) gives easier gearing; a standard (53/39) suits strong riders on flat roads.