Compact crankset interchangeability

Asked by: Chris Mercier

How do I know if my crankset is compatible?

In most cases three-and two-piece cranksets are compatible with the same bottom brackets so long as the axle is the same diameter. They are commonly used in conjunction with the mid-style bottom bracket standard. One-piece: This is where the axle and crank arms are a single piece of steel.

Are cranksets interchangeable?

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.

Do all cranksets fit all bottom bracket?

In general terms, most cranksets can be fitted to a variety of bottom bracket shells, though much of this compatibility depends upon the availability of suitable hardware (see next section). Any incompatibilities that do arise are often related to the length and/or diameter of the crank axle.

Can you mix and match crank arms?

Back to your question, if you stick to the same type of arm and interface (like road or mountain bike), you can generally mix and match between the left and right sides. So you might have a 105 power crank arm matched with an Ultegra crank arm. Just make sure to match crank arm length and you are set. That’s the idea!

How do you know what cranks will fit your bike?

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.

Are bike cranksets universal?

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.

Is BB30 compatible with Shimano?

Our Shimano BB30/PF30 68mm ROAD BB. It is compatible with Shimano™ Hollowtech II cranks. High-grade Enduro 2437 steel bearings are fully sealed and are a fantastic replacement BB for your Shimano™ drivetrain. See photos and Manual!

Are SRAM and Shimano cranksets interchangeable?

Thus, cranks from Shimano, SRAM, and Campagnolo are freely interchangeable along with those from all aftermarket brands (e.g. FSA, Rotor, Praxis, etc.). And while it is preferable to match the chainrings/crankset to the transmission, there is no strict need to do so.

Can you just change crank arms?

Replacing square taper cranks is not a hard job, but does require a special tool to pull the cranks off the bottom bracket axle. Also, the new cranks should be tightened onto the axle with a torque wrench to ensure sufficient torque is applied (but they are not over-torqued).

What is the difference between BB30 and BSA?

BSA is English standard and have screw thread inside the hole ,usually use in shimano,while BB30 is Italian standard and don’t have screw thread, usually use in CP.

What cranks work with BB30?

1. Compatibility of bottom brackets

Is BB92 the same as PF92?

The frame’s bottom bracket shell inner diameter is 37mm. A bearing with an OD of 37mm is pressed directly into the frame. Trek is moving away from the BB90/95 system to what they call PF92, which is the same as a BB92 (41mm ID shell and 92mm width).

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.

What’s the difference between 170mm and 175mm cranks?

Still though, the difference between 170 mm and 175mm is less than 3% and leg lengths of bike riders vary by far more than that. There is a school of thought, particularly in the United States, which suggests that crank length should be proportionate to leg length.

What is a compact crankset?

A compact crank refers to a road bike crankset with relatively smaller chainrings that can make pedaling easier. While ‘standard’ cranks come with a 53-tooth large chainring and a 39-tooth small ring, compact cranks usually feature 50- and 34-tooth rings.

What cranks are compatible with Shimano?

In the case of Shimano, 110mm or 104mm is often used for so-called compact cranks (50T outer diameter), while 130mm is used for 53T outer diameter.

Can you just change crank arms?

Replacing square taper cranks is not a hard job, but does require a special tool to pull the cranks off the bottom bracket axle. Also, the new cranks should be tightened onto the axle with a torque wrench to ensure sufficient torque is applied (but they are not over-torqued).

Can I use an 11 speed crank on a 8 speed bike?

Nominally no, an 11 speed speed crank will not work with an 8 speed drivetrain.

Are Chainsets interchangeable?

No, cranks are not generally always interchangeable, but you probably can transplant the crank from the broken bike. First, do both bikes have 6, 7 or 8 sprockets in the rear cluster? If so, they use the same chain width and the spacing between the chainrings will be the same.

Is BB30 compatible with Shimano?

Our Shimano BB30/PF30 68mm ROAD BB. It is compatible with Shimano™ Hollowtech II cranks. High-grade Enduro 2437 steel bearings are fully sealed and are a fantastic replacement BB for your Shimano™ drivetrain. See photos and Manual!

What is the difference between BB30 and BB86?

BB86/92, BB90/95 & PF92



While the “30” in BB30/PF30 references the inside diameter of the used, the numbers in BB86/92 and BB90/95 refer to the width of the frame’s bottom bracket shell. The BB86/92 bottom bracket system uses a bearing pressed into a cup, which is then pressed into the frame.