How do you calculate gearing on a bike?

How do you calculate gearing on a bike?

To find this: divide the number of teeth on the chainring by the number of teeth on the sprocket; multiply by the wheel diameter (as with gear inches); then multiply this figure by pi (3.14) and convert to metric. That’s 6.39 metres for the 700×28C bike with 48/16 gearing, above.

What is the best gear ratio for a road bike?

Most new endurance and entry level road bikes are specced with 50/34 chainsets, racing bikes with 52/36, and time trial bikes with 53/39. This is good news for most riders as the gearing corresponds to the type of riding for which the bike is intended.

How do bike gears compare?

Gear Inches & Understanding Your Gear Ratios The best way to compare chainring and cassette combinations between bikes is to check their gear inches. They’re very easy to calculate: it’s the diameter of the wheel, times the size of the front chainring, divided by the size of the rear cog.

How do you determine the top speed of a bicycle?

Max speed (MS). MS = MaxRWrpm * C = 876.225rpm * 78.5 inches = 68783.66 inches per minute. One mile = 5,280 feet = 63360 inches. MS = 65.13 mph which is a reasonable result.

Which is gear 1 on a bike?

First gear is the lowest gear and the easiest for climbing hills. Most multispeed bikes possess seven gears but may have up to nine. If your drive chain is on the smallest sprocket, which is the hardest gear, moving it to first gear causes the drive chain to climb up six spaces on the cassette if you have seven gears.

What gears for what Speed km?


Manual transmission change speeds – UP –
Gear Change Approx. Speed Tachometer (Revs)
1st – 2nd 2nd – 3rd 3rd – 4th 4th – 5th 25 km/h 40 km/h 60 km/h 80 km/h 2,000 – 3,000 rpm 2,500 – 3,500 rpm 2,500 – 3,500 rpm 2,500 – 3,500 rpm

What is the best gear ratio?

A gearing ratio lower than 25% is typically considered low-risk by both investors and lenders. A gearing ratio between 25% and 50% is typically considered optimal or normal for well-established companies.

What is a good gear ratio?

In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.

How do you calculate gear ratio speed?

A gear is made up of toothed wheels (“teeth”) connected to shafts. To calculate speed ratio, otherwise known as gear ratio, you divide the number of teeth of the input gear by the number of teeth of the output gear.

Is 10 speed enough for road bike?

Yes, 10-speed bikes are good simply because they have a lot of range. 10-speed bikes are (generally speaking) an OG (i.e. one gear) which makes them far easier and cheaper to maintain. This is because you’re only dealing with gears on the rear hub and you don’t have to faff around with anything else.

How do you calculate the gear ratio on a bike?

Gears are used to increase the force or speed and gear ratio is a unit of bike gearing. To calculate the gear ratio, divide the number of teeth in front chainring by the number of teeth in a rear sprocket: For example, if the number of teeth is even, the gear ratio equals 1.

How to calculate a bicycle gear ratio?

How to calculate bicycle gear ratio? Simple, just divide your rear cog size from your front chainring size. If you know their numbers, just input them below and we’ll calculate it automatically for you! Also take a look at our complete bicycle gear ratio chart below to see how your size compares to other gearing options.

What is the best gear ratio for a bicycle?

For most riders, the best gear ratio is a 2:1 ratio. This means there are twice as many teeth on the chainring as there are on the rear cog. A bicycle with 32 teeth in the front and 16 in the back has a 2:1 ratio, and will perform for a wide range of riding conditions, like slight inclines and stop-and-go traffic.

How do you calculate gear inches on a bicycle?

Once you have established this basic knowledge it is time to calculate your gear inches. For your low gear inches, take number of teeth on your smallest chainring (front), then divide it by the number of teeth on your largest cassette gear (back), take the result and multiply it by your bikes tire diameter.