Bottom Bracket question

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  • 12-03-2012
    trufflepig
    Bottom Bracket question
    Looking at a new frame and the BB shell has no threads. In the past I have used external bearing and was wondering what the advantage is of having no threads. Is there a type of BB that is best suited for this or is it meant to be universal. The frame is a Kona Raijinhttp://forums.mtbr.com/images/smilies/confused.gif
  • 12-03-2012
    Slash5
    Looks like a PF30. Couple of threads here discussing it. Have to use a compatible crankset. I think I read that Shimano doesn't support it.
    http://forums.mtbr.com/drivetrain-sh...ts-764404.html
    http://forums.mtbr.com/drivetrain-sh...ty-759487.html
  • 12-03-2012
    rockyuphill
    Can also be a BB-92 press fit, (41mm diameter). Sadly Kona keeps all the specs a secret on the Raijin frame.
  • 12-03-2012
    veteran_youth
    So uber-classified it was hidden on the 2nd link when you google "Kona Raijin"?

    Picture 1418 In Stock and Available Now – The New Titanium 29 Kona Raijin | Kona COG

    So sneaky.
  • 12-03-2012
    SkidVicious
    fits the same way as a headset does. like those guys said, one of those two standards...frankly I'm surprised there are only two standards
  • 12-03-2012
    veteran_youth
    Quote:

    Originally Posted by SkidVicious View Post
    fits the same way as a headset does. like those guys said, one of those two standards...frankly I'm surprised there are only two standards

    Actually, not true. And though the Kona website is ambiguous about this from the pic it appears to be a 46mm shell (PF30) BB. There is also BB30 where the outer metal bearing race presses directly into the frame. Slightly smaller shell but accepts the same 30mm axle.

    I think Cervelo's 'BBright' is tweaked a bit too. Then add in Spanish and American BMX BBs, and the old Fisher/Merlin 6903 press-fits, and you have significantly more than two.

    Oh and I forgot to add, BB92 and BB86 are different widths for MTB and road respectively.
  • 12-03-2012
    SkidVicious
    forgot about the bmx ones, was thinking in terms of newer standards...dammit bike industry: you never fail to not surprise me, even with my hindsight goggles on.

    ...the 2nd pic in your link is labelled bb30, VY...but i'd trust you over a picture on the web...no, seriously i would...

    this link explains it: Bottom Bracket Standards - Slowtwitch.com

    next big thing: cottered cranks will make a comeback...:eekster:
  • 12-04-2012
    Unglued
    Awesome bike TP. Now try not to ride this one into anything...
  • 12-04-2012
    trufflepig
    Awesome bike TP. Now try not to ride this one into anything...
    That last one really woke me up. For the next couple of weeks I felt like my body was used for batting practice.
    I'm sorry for not asking this earlier but is everything OK with your bike.
    I think that I went over your wheels
  • 12-04-2012
    Unglued
    Quote:

    Originally Posted by trufflepig View Post
    Awesome bike TP. Now try not to ride this one into anything...
    That last one really woke me up. For the next couple of weeks I felt like my body was used for batting practice.
    I'm sorry for not asking this earlier but is everything OK with your bike.
    I think that I went over your wheels

    You did go over my wheels but fortunately (for my bike) you were airborne at the time. My bike is fine. I guess that settles the " is the aluminum Misfit more durable than the steel Misfit" debate once and for all. I'm just glad you are ok. That was one scary crash...
  • 12-04-2012
    trufflepig
    The steel frame cracked and folded but the carbon forks came away uncsathed.
    I ordered the Raijin yesterday so once I figure out what pieces to add, it should be ready for spring
  • 12-04-2012
    trufflepig
    I thank you guys for all the info on the BB's
  • 12-05-2012
    garage monster
    Quote:

    Originally Posted by trufflepig View Post
    Awesome bike TP. Now try not to ride this one into anything...
    That last one really woke me up. For the next couple of weeks I felt like my body was used for batting practice.
    I'm sorry for not asking this earlier but is everything OK with your bike.
    I think that I went over your wheels

    What the heck happened? :confused:
  • 12-05-2012
    Unglued
    Quote:

    Originally Posted by garage monster View Post
    What the heck happened? :confused:

    Basically there was alcohol fuelled mayhem at the anti race. We were all racing down the fire road from Three Stage on the way back. There was a sharp left handed and someone moved across not realizing I was behind them. I think it was Arek. I ended up in the ditch, unscathed but shaken up. I had just got up and was standing on the ditch with my bike still on the ground, when along comes Glen, who has overcooked the turn, gone wide and also wound up in the ditch. He hits my bike and gets catapulted OTB. His frame basically folded in half, with the top tube detaching from e head tube and the down tube crumpling. My bike ( the white ALC) was to my utter amazement undamaged. I seriously thought Glen had killed himself because he was going so fast. Was actually pretty scary.

    Moral of the story: when Del says "last one to the stop sign at the bottom of the hill is a Hannem"', sometimes it is ok to be the Hannem....:D
  • 12-05-2012
    Arek
    Quote:

    Originally Posted by Unglued View Post
    ... someone moved across not realizing I was behind them. I think it was Arek. I ended up in the ditch, unscathed but shaken up.

    Umm.. From where I was - about 8-10 seconds behind you - it looked like it was you who "overcooked" the turn, at least I didn't notice much of interference from other riders... Then Glenn followed coming in right behind me.
  • 12-05-2012
    nspace
    You wont regret. Lynskey does great Ti work, and Kona looks to have designed a really nice frame. This will be the 3rd Rajin someone I know is buying; Kona really needs to make more stuff like this.

    Although...english threaded BB's FTW!
  • 12-05-2012
    Unglued
    Quote:

    Originally Posted by Arek View Post
    Umm.. From where I was - about 8-10 seconds behind you - it looked like it was you who "overcooked" the turn, at least I didn't notice much of interference from other riders... Then Glenn followed coming in right behind me.

    Maybe it was someone else and I just assumed it was you because you are generally ahead of me. Or at least you were last year...
  • 12-05-2012
    Circlip
    Quote:

    Originally Posted by Unglued View Post
    Basically there was alcohol fuelled mayhem at the anti race. We were all racing down the fire road from Three Stage on the way back. There was a sharp left handed and someone moved across not realizing I was behind them. I think it was Arek. I ended up in the ditch, unscathed but shaken up. I had just got up and was standing on the ditch with my bike still on the ground, when along comes Glen, who has overcooked the turn, gone wide and also wound up in the ditch. He hits my bike and gets catapulted OTB. His frame basically folded in half, with the top tube detaching from e head tube and the down tube crumpling. My bike ( the white ALC) was to my utter amazement undamaged. I seriously thought Glen had killed himself because he was going so fast. Was actually pretty scary.

    And you would have gotten away with it too, if it weren't for those meddling kids.
  • 12-05-2012
    swabag
    Quote:

    Originally Posted by Unglued View Post
    Basically there was alcohol fuelled mayhem at the anti race. We were all racing down the fire road from Three Stage on the way back. There was a sharp left handed and someone moved across not realizing I was behind them. I think it was Arek. I ended up in the ditch, unscathed but shaken up. I had just got up and was standing on the ditch with my bike still on the ground, when along comes Glen, who has overcooked the turn, gone wide and also wound up in the ditch. He hits my bike and gets catapulted OTB. His frame basically folded in half, with the top tube detaching from e head tube and the down tube crumpling. My bike ( the white ALC) was to my utter amazement undamaged. I seriously thought Glen had killed himself because he was going so fast. Was actually pretty scary.

    Moral of the story: when Del says "last one to the stop sign at the bottom of the hill is a Hannem"', sometimes it is ok to be the Hannem....:D

    That wasn`t a fire road that was a road, everything else seems accurate, including not stopping till the stop sign at the bottom(which i won BTW NBD) after almost going in the ditch following Louda`s line. good times
  • 12-06-2012
    ol-crank
    now I'm stuck which FTW is this?
    Quote:

    Originally Posted by nspace View Post
    You wont regret. Lynskey does great Ti work, and Kona looks to have designed a really nice frame. This will be the 3rd Rajin someone I know is buying; Kona really needs to make more stuff like this.

    Although...english threaded BB's FTW!

    just wondering
  • 12-07-2012
    nspace
    Quote:

    Originally Posted by ol-crank View Post
    just wondering

    Win. But this is coming from a guy also loves square taper cranks so take it for what its worth. Maybe I am grumpy, but I fail to see all the benefits of 238747732 different diameters of HT's and BB's. Regardless, the Rajin looks amazing.
  • 12-07-2012
    ol-crank
    I am curious because last spring I built up a CF CX
    Quote:

    Originally Posted by nspace View Post
    Win. But this is coming from a guy also loves square taper cranks so take it for what its worth. Maybe I am grumpy, but I fail to see all the benefits of 238747732 different diameters of HT's and BB's. Regardless, the Rajin looks amazing.

    frame (chinese) and used DA triple. Broke the chainstay so it's scrap, but am looking at Price Point Sette 29er CF frame and might use the DA shifters, and crank but there are some KLite carbon cranks around for 299, double 27-42. I am comfortable mixing road and mtb components, but am trying to think of a reason not to use a perfectly good road crank with 68 English thread BB. So am looking at what others think.
  • 12-07-2012
    veteran_youth
    Quote:

    Originally Posted by ol-crank View Post
    frame (chinese) and used DA triple. Broke the chainstay so it's scrap, but am looking at Price Point Sette 29er CF frame and might use the DA shifters, and crank but there are some KLite carbon cranks around for 299, double 27-42. I am comfortable mixing road and mtb components, but am trying to think of a reason not to use a perfectly good road crank with 68 English thread BB. So am looking at what others think.

    There is a very good chance that a road crank will not have sufficient clearance for the chainstays on a 29er. Not saying it won't work, but i wouldn't pull the trigger expecting it would.
  • 12-07-2012
    ol-crank
    good point. When I first built up the Orbea 29 frame,
    Quote:

    Originally Posted by veteran_youth View Post
    There is a very good chance that a road crank will not have sufficient clearance for the chainstays on a 29er. Not saying it won't work, but i wouldn't pull the trigger expecting it would.

    I used the same setup and it worked there. The Sette frame might be a little wider, and if I started with that frame, that would be my excuse to dump the DA crank and go with the FSA carbon double.(I did need an excuse remember) FSA crank is 10 speed, so I am still taking a chance with the
    9 speed chain, cassette, and rear derailler, but in the end it all works out.
    This is my P2A bike. I was disappointed last year with the clearance on the rear chainstay, as the mud had it clogged up pretty good.