What cranks will fit my bottom bracket?
1. Compatibility of bottom brackets
| BB standard | Crankset compatibility |
|---|---|
| 2. PF30, OSBB | Hollowtech II, BB386EVO, OSBB, BBright, BB30 |
| 3. BB86, BB90, BB92 | Hollowtech II |
| 4. BBright | Hollowtech II, BB386EVO |
| 5. BB386EVO | Hollowtech II, BBright, OSBB, BB30 if the spindle is long enough |
Do all cranksets fit all bottom brackets?
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.
What is pedal Q factor?
Essentially Q-Factor is the distance between the pedal attachment points on the crank arms, also referred to as Tread. It could also be described as the width of your crankset. This affects your stance, if you’ve ever been snowboarding think of it as the same thing, essentially the distance between your feet.
How do I know which crankset to buy?
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.
Does Q factor really matter?
Decreasing your Q-factor, or bringing your crank arms closer together, may make you more aerodynamic, but it won’t necessarily make you faster. You may lose a significant amount of power, or stop recruiting your glutes in such a narrow position.
What is Shimano crank Q factor?
Q factor is the overall width of an installed crankset, measured parallel to the bottom bracket shell from the outside of one pedal insertion point to the other. You can think of it like this: the larger the Q factor, the farther apart your feet will be.
What is a bike crankset?
The heart of your drivetrain, bike cranksets collectively help convert your pedaling power into the forward propulsion of your bike. The term bike cranksets is actually a catch-all that includes several critical components, including chainring (s), bottom bracket, and cranks.
Will a Hollowtech II bottom bracket fit on a road crankset?
Threading in a Hollowtech II bottom bracket to the 73 mm shell makes the assembly too wide for the (110mm) axle of a road crankset so it won’t fit. Higher spec models use a 73 mm press fit bottom bracket shell.
What are bottom brackets on a bike?
Bottom brackets help connect the cranks and chainring (s) to your bike and allow the cranks to spin freely. There are many bottom bracket types and sizes, including threaded, BB30, PF30, and BB86 just to name a few. Choosing the right bottom bracket and bike cranksets can be a confusing process.
What type of crankset do I need for a tiagra?
You need a mountain bike specific crankset. Tiagra is a road group. Road bikes typically have a 68 mm wide bottom bracket shell, and mountain bikes have 73 mm. The wider BB shell is used to give a proper chainline with the (usually) wider rear axle spacing (OLD) and will result in a wider q-factor (distance between pedals.)