MTB cranks for bicycles with triple chainring

Triple chainrings are a bicycle drivetrain configuration that uses three front sprockets and a compatible rear cassette. This configuration provides a wide range of gear ratios, but its main disadvantage is its high weight and the need to use a front derailleur.

How to choose suitable cranks with triple chainring?

Consider the following factors when choosing a three-speed crankset for your mountain bike:

Gear range: Determine the gear range you need based on the terrain you ride in and your riding style. Triple chainring cranksets provide a wider range of gears compared to a double chainring set, offering lower gears for easier climbing, mid-range for normal riding, and higher gears for higher speed on the flats and downhills.
Sprocket sizes: Choose the appropriate sprocket sizes based on the required gear ratios. The specific sizes will depend on your personal preferences and the terrain in which you ride. Common MTB three-speed chainring sizes range from 22T to 42T for the smaller chainring, 32T to 44T for the medium chainring, and 42T to 52T for the larger chainring.
Compatibility: Ensure compatibility with your bike frame, bottom bracket type and derailleur. Different bikes use different bottom brackets standards, such as threaded (e.g. BSA or English) or pressed (e.g. PF30 or BB92). Check that the selected crankset is compatible with the specific type of bottom bracket and frame specifications.
Chain line: The bike chain line refers to the alignment of the bike chain with the drivetrain components. Specifically, it is the distance between the axis of the bicycle frame and the axis of the chainring at the front and the axis of the cassette at the back. For most MTB bikes, the chain distance from the frame axis is around 50 mm, but you can find the recommended chain distance in the specifications of your bike.
Material and durability: Consider the materials used in the construction of the crankset. Common materials include aluminium, carbon fibre, or a combination of both. Aluminium cranks are generally more affordable, while carbon cranks offer less weight but are more expensive. Choose a crankset that balances durability, weight and won't break your budget.
Brand and reviews: Explore offers from reputable brands known for producing quality cranksets. Read reviews from other riders to get insight into the performance, durability, and reliability of different types of cranks.
Budget: Determine your budget and pick a crankset that provides the features you want within your price range. Higher-end cranksets often offer lighter weight, better stiffness, and more power, but can be more expensive.

Can I convert my existing double to a triple chainring drive?

Converting an existing crankset to a triple chainring system can be more challenging. It may require additional components, such as a new front derailleur, or a different bottom bracket. Compatibility with the frame and drive system of your bike is decisive.

Do triple chainring cranks require more maintenance than other cranks?

Triple chainring cranksets may require a bit more maintenance compared to double or single chainring cranksets due to the additional components and more complex derailleur setup. Regular inspection, cleaning and proper lubrication are required to ensure optimal performance and long life.

Are there any disadvantages to using a triple chainring?

Potential disadvantages of using a triple chainring include slightly higher weight and a more complex front shift mechanism. However, for riders who require a wide range of gear ratios, the advantages often outweigh the disadvantages.