BB30-What is it?
BB30 is a new bottom bracket standard for bicycles. It requires a completely different shell than a standard bottom bracket, one that can fit a press in style bearing.
What does BB30 stand for?
BB30 stands for Bottom Bracket w/ a 30mm spindle. BB30 was originally developed by Cannondale, but left as "Open Source" so anyone could develop off of it.
What is the advantage of BB30?
There are 3 advantages of a BB30 system. #1-It is a lighter weight system, because there are no cups that the bottom bracket bearings sit in. #2-It is stiffer because the spindle that goes through the bottom bracket is 30mm instead of 24mm. It remains the same weight though because they can make the metal thinner. Think about a fat aluminum frame compared to a skinny tubed aluminum frame. Both are very strong, but the fat tubed frame generally isn't heavier. #3-Lower "Q Factor." The Q factor is how far apart your legs are when they are on the pedals. Generally you want the lowest Q factor possible. Lower Q factor=MORE POWER!!!
BB30 sounds awesome, why wouldn't I want it?
The main reason why you wouldn't want BB30 is because of availability. Right now, there are only 3 mountain cranksets out (FSA K-Force, Afterburner, and SRAM XX). That is kinda limited, and with the big industry push for BB30, availability is looking a little scarce right now. In the road world, there are 5 cranksets (FSA K Force, FSA Sl-K, FSA Gossamer, SRAM Red, and Sram Force). If you dig one of those cranks, awesome! If you are a Shimano/RaceFace guy, don't fret though. Wheels Manufacturing makes an adapter to use the BB30 bearing with a Shimano or RaceFace crankset (24mm standard). SRAM and FSA also make an insert that can go into a BB30 shell to use a standard thread-in bottom bracket. If you are building a new bike from the frame up, I would totally roll with a BB30 bottom bracket shell. Even if you end up not using a BB30 crankset, you can still use any other crankset.
Does BB30 cost more money?
Yes. If your bike new bike has a BB30 shell, awesome. The frames themselves are generally higher end bikes that come with this option. The cranksets generally cost a few bucks more too. An FSA Afterburner double crankset is $250, the double BB30 is $325. So $75 extra for the crankset with the BB30 option. That cost difference is amplified the higher end you go. I'm not even gonna tell you the price of the new FSA K-Force Lite ceramic double MTB crank, because you'll probably throw up all over your keyboard. Ok, the it's $1,000. Yes, that is a grand for a freaking crankset?!
I saw you posted in an internet forum that you want to put a road crankset on your mountain bike and run it as a single, will that work?
No. FSA told me so. Q also told me it wouldn't work. I didn't believe either of them, and called SRAM, and they told me not to be a dumbass, and it won't work. Why not you ask? Because it's like that. And that's the way it is. I'm still gonna try it anyways, because I need to see it to believe it, you know?
BB30 sounds pretty awesome. What the fuck is BB86, or BB92, and BB90? Are those the same thing?
No. BB86 is a road standard developed by Shimano. Basically it is a larger shell than the standard road 68mm, it is 86mm wide. They essentially get rid of the cup that the bearing sits in, and put that bearing in a cup that gets pressed into the frame. This system sucks though. It basically eliminates threading a cup into the frame, but pressing a cup in instead. It still utilizes the same 24mm spindle though, not the 30mm. BB92 is the same thing, only for mountain bikes. BB90 is essentially the same thing as BB86, only the shell is 90mm wide, and uses a slightly different bearing (*I think*). BB90 is only on Trek bikes though. It is just Trek trying to be a douchebag and coming up with their own thing which is completely different than everything else so you will have to buy the replacement part only from them. BB90 also uses standard road cranks with a 24mm spindle, not the 30mm spindle. All BB86, 90, and 92 cranks use the same bearing that your cranks currently have not the larger BB30 bearing. There is no real advantage of this system, as the Q factor does not change, and because the bearing still has to go into a cup that goes into the frame, there is no weight savings. BB30 eliminates the cup and presses straight into the frame.
Great! Now I know everything about BB30, what are you getting on your bike Pusher?
Of course I'm getting BB30!
Harsh word but that's how I feel. I have SO much to do... the possibilities
are all around me... literally. BUT, all I want to do is read a certain blog
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