Even if the BB30 standard has been introduced a long time ago, not many people know much about it. Even after searching the internet I see a lot of information again, what I believe is just a marketing thing by the companies selling parts. This is what I think I found out and would like to hear what you think about it. Slowtitch readers have helped already in the past to develop products made by athletes. All your input counts like it did in the past. Thank you for your time!
The BB30 crank set and Bottom Bracket system has been developed by Cannondale and was introduced to the industry in 2000.
The Si (System Integrated) crank set design is in conjunction with an oversize bearings and a 30mm spindle. The BB30 is not industry standard since all companies use the 24mm spindle type system as a standard.
The system has not been patent so it is international free to be used by frame and component companies. Not many companies are using the new BB30 system yet and only a few component companies are offering the BB30 crank sets.
Is it better than the “old” system? I am not sure, but let’s look at some factors so you can make up your own mind and don’t just believe the marketing campaign by some very high paid marketing guru’s.
Here are some of my thoughts regards the BB30 system.
It makes sense that it will be stiffer and lighter bottom bracket since you are using a bigger axel / spindle (30mm instead of 24mm) and don’t need cups anymore. However, how stiff do you want to be? The Dura Ace cranks are already a very stiff crank sets. So is the extra stiffness you gain really worth the money?
Less weight at the Bottom bracket is correct since you don’t need cups, but instead of a 24mm axel you use 30mm and that will add weight to the crank set. So watch out what you purchase, since you might end up with a heavier bike after all. Some designs are light but expensive and not many companies have released a BB30 crank sets yet. So the competition is small and prices are high. Just a thought!
Now, moving the bearings inside of the frame will bring the crank arms close together (Q-factor). Will that make it more aerodynamic? CSC riders have complained about the “Heel hit”. Some athletes might be able to ride with a reduced q-factor.
Right now if you purchase for example the Hawk Racing Bottom Bracket as an upgrade you are more likely to change the Bottom bracket yourself, since you can use very simple and inexpensive tools. The bearings are already pressed into the cups, so you don’t need to purchase a bearings press. If you upgrade your BB30 system, you have to bring your bike to a bike shop and their will charge you more money for the installation. Furthermore, if you are looking for an upgrade to better bearings you are most likely a strong athlete too and would like to take care of your expensive bike. To service the standard bottom brackets right now, again you can most likely do it yourself since all tools are a MUST in a good little home mechanic tool box. Last but not least, if you do have problems with the bearings, simply exchange the whole bottom bracket at Hawk Racing and we replace it with a new bottom bracket.
Will the BB30 became the future of Bottom Bracket standards? Well, I guess we the consumer decide if we want it. If athletes buy it, companies will make it. If we decide we can skip it and buy something else instead companies won’t make it.
I hope you can give some feedback to the BB30 and maybe provide some links what you think is worth to read. I think it should be kept simple and I like to work on my bike myself.
Thanks for your help!