Are Z-shaped cranks a good idea?

Asked by: Amy Videen

How do I choose a crankset?

Cranks come in a range of sizes, most commonly from 165mm to 190mm, and ideal crank length is often determined by three factors: your height, your cycling discipline and your personal preferences. If you change your crank length, it will change how it feels to pedal your bike, and it may change your fit on your bike.

Do cranks make a difference?

‘The research evidence is clear: crank length makes no difference to power on the road – track is slightly different – unless you go as short as 80mm or as long as 320mm. And as a bike fitter and physiotherapist, I’ve never had a reason to go bigger.

How many types of cranksets are there?

The crankset, also called the chainset, consists of crank arms and chainrings. Cranksets come in three main formats, single, double, and triple.

How tight should crank arms be?

Quote from video: We put the tool in the cap. Just a couple of fingers will do us about four inch pounds. Sometimes not that much if you bring the crank arm over to the bearings.

What crank length do the pros use?

Quote from video: This formula assumes that the crank length is around nine point seven percent of our height.

How long should a crankset last?

As long as crank arms are checked regularly for tightness they should last for years and years. I have vintage Sugino Aero Tour (AT) crank arms that I have used for over twenty-five years without any wear to the square tapers. I’ve installed and worn out four or five chain ring sets using the same crank arms.

Which is better 170mm or 175mm crank arm?

Macdermid found that riders reached their peak power nearly 1 second quicker on 170mm cranks than they did on 175mm cranks. That means shorter cranks give riders better acceleration, which can make a difference when passing other riders or trying to clean an obstacle.

Why are shorter cranks better?

Conversely, switching to shorter cranks could potentially have some benefits. “If you struggle with knee or back problems on the bike, shorter cranks might help”, says Burt. “Not because they directly fix the problem, but because shorter cranks put less load on your joints and hip flexors.”

Are shorter cranks better for knees?

In other words, a shorter crank does give you less leverage, but that shorter crank arm allows your downstroke to start where your body can create more power. This (according to the Canfields) produces more power and (according to the study cited below) is better for your knees and hips.

Can I put any crankset on my bike?

Cranksets are not always interchangeable. Every crank is designed to work with a specific bottom bracket. Even if the cranks use the same interface (octalink, square taper, or hollow tech), switching them between bike brands or even models of the same brand is hard.

Does crank spindle length matter?

The critical thing is your spindle length: as long as you can set up the correct chainline you will be good to go. But, again, best never to mix standards if you can at all avoid it. If you are looking to replace a cottered crank setup with a square taper setup, then look no further than a cartridge bottom bracket.

Can I put a bigger crankset on my bike?

Yes, you can. This will make it suitable for diverse terrains and make pedaling easier. Putting a smaller chainring on your road bike isn’t a problem but you may have to change your crankset.

Are longer cranks better for climbing?

2. Shorter cranks are easier to spin and thus better for acceleration and quickness, relative to something longer. Tradition always dictated that track riders used shorter cranks, as their riding style required those characteristics.

What do shorter crank arms do?

Going to a shorter crank will allow you to ride at a lower back angle which minimizes frontal surface area improving aerodynamics. It can be frustrating to know that there are many available crank options that would work for an athlete.

How does crank length affect ride?

Quote from video: Похожие запросы

Do all cranksets fit all bikes?

Crankset compatibility. You can replace the chainrings on your crankset, but not all chainrings will fit all cranks. First, different cranksets may have a different number of arms or direct-mount interfaces (connecting the cranks to the chainrings), and they may be positioned differently.

What is the difference between 170mm and 175mm cranks?

Macdermid found that riders reached their peak power nearly 1 second quicker on 170mm cranks than they did on 175mm cranks. That means shorter cranks give riders better acceleration, which can make a difference when passing other riders or trying to clean an obstacle.

What is a 50 34 crankset?

Compact chainset​



A compact chainset has a 50-tooth outer chainring and a 34-tooth inner chainring. This means that the gears are lower (easier to turn, but they’ll progress you a shorter distance per pedal revolution) than you get with a 53/39 chainset (above) with the same cassette.

How do I choose chainring size?

Quote from video: It's easy to choose the correct size of chainring. Take yourself on a bike ride and observe where your chain is spending most of its time on the rear cassette. You should be spending around eighty

What size chainring is best for climbing?

Mountain bike chainrings are available in smaller sizes all the way down to 26t, though I’d recommend most riders try a 30t or 28t first to experience how much easier it is to climb. For gravel bikes, I wouldn’t recommend going any smaller than 38t to maintain top-end speed on downhills.

Is a smaller chainring better?

The size of a chainring (often expressed in terms of the amount of teeth on it, e.g. a 53t ring) plays a direct role in your bike’s gearing, with bigger rings meaning a higher (harder to push) gear and smaller rings a lower (easier to push) gear.