Crankset Boost vs Superboost: What’s the Deal?
Confused about Boost and Superboost cranksets? You’re not alone! Mountain bike technology can be overwhelming. This article breaks down the differences. We’ll cover what you need to know to choose the right crankset for your bike.
Understanding Hub Standards
Before diving into cranksets, let’s talk about hub spacing. Hub spacing is the distance between the dropouts on your frame where the wheel sits. Different standards exist, affecting wheel stiffness and chainline.
- Standard: The original, now mostly used on road and gravel bikes.
- Boost: Became the new mountain bike standard.
- Superboost: An evolution of Boost, aiming for even greater stiffness.
Boost vs. Superboost: Key Differences
Boost and Superboost differ primarily in rear hub spacing. This spacing affects the chainline, which impacts shifting performance.
| Feature | Boost | Superboost |
|---|---|---|
| Rear Hub Spacing | 148mm | 157mm |
| Chainline (approximate) | 52mm | 56.5mm |
Boost uses a 148mm rear hub spacing. Superboost uses a wider 157mm spacing. This 9mm difference might seem small, but it has implications.
Cranksets and Chainline
The crankset itself isn’t necessarily “Boost” or “Superboost.” The chainring offset determines the chainline. Chainline is the distance from the bike’s centerline to the chainring.
To run a Superboost setup on a Boost frame, you need the correct chainring offset. You’d use a chainring with a smaller offset to achieve the desired chainline. For example, some use a 3mm offset chainring on a boost frame with a superboost crank.
Why Superboost?
Superboost aims to improve wheel stiffness and frame clearance. The wider hub flanges create a stronger wheel. It also allows for shorter chainstays on some frame designs.
Compatibility Considerations
Can you use a Superboost crankset on a Boost frame? Sometimes, but it’s not always straightforward. You’ll need to consider chainring offset and bottom bracket compatibility.
Some Superboost setups require a longer spindle to clear the frame. Always check with the frame and crankset manufacturers for compatibility information.
Choosing the Right Crankset
The best crankset for you depends on your bike’s frame spacing. Make sure your crankset and chainring are compatible with your frame. If you have a Boost frame, stick with a Boost-compatible crankset and chainring. If you have a Superboost frame, use a Superboost-compatible setup.
Confused? Consult your local bike shop! They can help you determine the correct crankset and chainring for your bike.
