What is the best crank length for MTB?

Trail/Enduro – 170mm crank arm length is the most commonly used size and is recommended to keep a good leverage ratio and have a bit more ground clearance due to having more travel.

Can I replace crankset on bike?

Cranks may be removed to replace cranks or chainrings, service the bottom bracket bearings, or to clean the chainrings. To know the service options you will need to know the type of crank and type of bottom bracket bearing system installed in the bicycle.

What are bottom bracket spacers for?

Bottom bracket spacers are used to adjust the spindle position to add extra clearance, or to fine tune chainline. For example, if your inner chainring is too close to the chainstay you can add spacers to move the crank outward just a bit.

How do I know what crankset to buy?

2 Answers

Measure the length of the Bottom Bracket shell.
Count how many chainrings you have.
Count the teeth on the chainrings, or look for markings that may indicate the number of teeth (e.g..
Count how many cogs you have at the rear.
Length of crank arm is less important for me.

What is a mountain bike bottom bracket?

The bottom bracket bearing assembly, commonly referred to as ‘bottom bracket’ connects the crankset to the bicycle and allows the crankset to rotate freely and is located at the base of the stem that goes from the center of the pedal to the top of the saddle.

Why bottom bracket is so important?

The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely. It contains a spindle to which the crankset attaches, and the bearings that allow the spindle and crankset to rotate.

What is chainline on a bike?

Chainline is the distance between the centerline of your frame and the average centerline of your chainring(s). For 1X this is easy – If the center of your chainring teeth is 49mm from the centerline of your frame then your chainline is 49mm.

What do the cranks do on a bike?

The crankset, which includes all of the parts between the two pedals, is the bike’s transmission, so to speak. It takes the energy from your legs and puts it to use by powering the pedals, the chain and finally, the rear wheel. Crankset care, then, is about ensuring smooth power transfer .

What is the crank length of a bicycle?

Crank length is measured from the center of the pedal spindle to the center of the bottom bracket spindle or axle. The larger bicycle component manufacturers typically offer crank lengths for adult riders from 165 mm to 180 mm long in 2.5 mm increments, with 170 mm cranks being the most common size.

What is a mountain bike crank?

A mountain bike crankset consists of the physical crank and crankarms, which the pedals connect to, and the chain rings which are mounted on the crank. The crank is a crucial part of the drivetrain, since the combination of crank and pedals (and the legs driving them, of course) generate all of the energy that propels the bike.