Downhill Mountain Bike Gear Ratio

Above 100 gear inches is good for flat paved roads with strong wind at the back.

Downhill mountain bike gear ratio. Shows table of all possible chainring sprocket combinations with gear ratio. Many cyclists want lower granny gears for long climbs particularly when training and racing at altitude. Common gear ratios are 39t or 42t for the inner ring and 52t or 53t for the outer. Benefit of 2x10 gearing on long climbs.

The gear you re in is a simple ratio of the number of teeth on the chainring to the number of teeth on. 20 gear inches for really low gearing needed for climbing steep off road ascents. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. The most common gear configurations for modern mountain bikes include one or two front chainrings.

To go faster you need a different ratio. Cross country however if you do long distance cross country riding you ll need a wider range of gears a 2 or 3 chain ring set up would be advantageous to ensure you power through those climbs and descend quickly on the other side. That s great for climbing a steep hill but bad for level ground or downhill stretches. The smallest rear sprocket equates to the hardest gear while at the front this is reversed.

Mtb cranks with 22 teeth small chainring and cassette with largest 34 teeth sprocket with 26 wheels gives about 17 gear inches. Bikes with single front chainrings are referred to as 1x or one by. More and more downhill bikes are beginning to favour the new standard of 27 5 650b wheel sizes which needs to be considered when selecting your gear ratios. Simple just divide your rear cog size from your front chainring size.

That is only 3 8 mph 6 2 kph which is about walking speed. Ratio of the highest gear of your setup. A standard double set up is usually the preferred choice for racing offering the largest chainring sizes for the. How to calculate bicycle gear ratio.

If you know their numbers just input them below and we ll calculate it automatically for you. Gear ratios for these gears. For example to ride downhill at 25 mph 40 kph with a 50 rpm cadence at the pedals you need about a 6 5 1 gear ratio. If you re concerned with optimizing performance and don t want to give up gears on the climbs or descents then 2x10 is likely the better choice for you.

Ratio of the lowest gear of your setup.