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  1. #1
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    First build 456-few questions

    So i'm about to embark on building my first bike. I'm a complete novice when it comes to wrenching on bicycles. I realize before hand that I will spend more money this way than buying complete, however I really want to acquire the knowledge and skills to be able to build/service a bike. Firstly, I have a separate bike that I wish to transfer the Sram X7 2x10 drivetrain and avid elixir brakes over to the 456 frame. Fi I'm unsure if the bottom bracket will swap properly however. I know the bottom bracket shell itself for both bikes is 68mm. The BB is an external type which I know can be compensated by removing/adding spacers but im lost on how exactly to verify the chainline isn't going to be ****ed when installing on the 456. Should I measure the chainline from the middle of the 2 chainrings to the center of the BB on the current bike to get a measurement? I haven't yet chosen a wheelset for the 456 so I don't know the hub size either which also affects chainline right? Lol. Help a noob out please. I haven't ordered the 456 yet because I was thinking I might have to order a BB with it if I can't get a swap from the one I have. Thank you! I'm going to start reading up on some other builds too so I don't come in as a complete idiot.
    Last edited by Jayrock205; 07-06-2014 at 12:37 AM.

  2. #2
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    Found out I was wrong regarding the 456 having a 68mm BB, it is a 73mm. So the BB won't swap from my previous bike. X7 crankset should though with the absence of spacers. Not sure what BB I should go with to accommodate the x7 cranks. I'm kind of lost when it comes to part compatibility.
    Last edited by Jayrock205; 06-25-2014 at 09:19 AM.

  3. #3
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    If you have an external BB then you have a GXP BB. On your 68mm BB on your old bike there should be 2 shims on the non-drive side. On a 73mm BB you just remove those 2 shims.
    Unless the BB is fairly recent on your old bike, I'd plan on a new one anyways. On a 73mm BB there isn't much you can do about chainline - there won't be any spacers to play with. You should end up with whatever the manufacturer designed - I wouldn't worry about it too much.
    Most parts should swap over. Seat post, seat post clamp, headset, and front derailleur will be the main things to look for.
    You may need a different rear brake adapter and of course should plan on new cables and housing. Brake hoses could be long/short.

  4. #4
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    The BB im swapping has less than like 25mi on it. I think it should be alright. The front derailleur is a clamp type mount. May need a shim or may not, not sure.

    I'm in the market for

    Manitou fork(budget friendly forks )
    Seatpost/saddle w/ seat post clamp(idk if I want to go used on this)
    Wheelset(need to do some research)
    Cables(not sure where to source proper cables that will route properly through this frame) Any ideas?


    .

  5. #5
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    I have a quick question about steerer length and would appreciate any advice.

    I got the 18" frame which has a ht length of 115mm. My cane creek headset has bottom stack of 12mm and top of 16mm stack. Have a stem that has 40mm of stack and a bunch of assorted spacers that equate to about 35mm of stack height. Total of all this is 218mm which is about 8 1/2 inches total. So does this mean I will need a steerer that is at 8 1/2 inches or longer to accommodate this? Not sure if I will need all the spacers or not to get the correct bar height desired.

    Any help is greatly appreciated!

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