Announcement

Collapse
No announcement yet.

Carbon Frame BBSHD Build

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

    Carbon Frame BBSHD Build

    Just thought I’d do a write up on my 2016 Carbon Giant Anthem build.
    Got a lot of info from here so just trying to give a little back..
    I bought a cheap 2nd hand 2016 27.5 Giant Anthem Advanced SX with the intension of installing a BBSHD.
    Some quick research after buying the bike indicated I may have bitten off more than I could chew but in the end I was able to make it work :-)
    First problem was the bottom bracket, PF41. It was relatively easy to remove with some care and a large pin punch, it came out undamaged. I was going to take it to the LBS to remove as they’d have the right tools but glad I tried to do it myself first.
    I was expecting to see some sort of alum insert inside the carbon BB but it was all just carbon fibre


    It’s hard to see in the pic but there’s a lip inside which wouldn’t allow Luna Cycles PF41 adaptor to slide straight through without grinding out some of the frame (which I didn’t want to do). This was resolved by getting a mate to turn up some nylon bushes on his lathe.

    This is the one for the drive side (small lip to keep the BBSHD as close to the frame as poss, the non drive side had a larger lip to space out the lock ring). The issue of everything still being able to move with the torque of the motor seems to be resolved by machining the bushes to a fine tolerance and using a piece of rubber between the BBSHD and frame (which is the way the BBSHD wants to move underload). I didn’t want to epoxy the bushes in as I want to be able to revert back to a normal MTB in case something didn’t work. I may use a torque arm (Luna Cycle has one suitable for dual sus bikes) in place of the ‘bunny ear’ plate if movement becomes an issue.
    After that everything was pretty straight forward.
    The only problem I have is the chain line is too far outboard (running a 46t Lekkie Blingring). It lines up well with the smallest cog on the cassette so it only works to about halfway up the cassette, which I can probably live with but I’m hoping Luna Cycle will sell me an eclipse Chainring which will I think enable me to use another couple of cogs.
    First ride (27.5 rim 27.5x2.1 road tire, 46t Chainring, smallest cog on cassette 10t) it is able to do 60kph on flat smooth surface (with moderate peldalling). Halfway up the cassette (11 speed sram, 42 is the largest cog) up a moderate hill can hold 30kph (with moderate pedalling).
    Quick shout out to Luna Cycle for being the pioneers and putting so much info out there to assist hacks like me!



    #2

    Comment


      #3
      what is the size of that giant anthem?

      Comment


        #4
        Originally posted by pcliteuser View Post
        what is the size of that giant anthem?
        +1 I'm thinking of doing a build on a small frame.

        Comment


          #5
          Nice bike. Will you be using it as a commuter?

          Is that BB insert part of the bike, or is that an adapter to fit the bbshd?

          Comment

          Working...
          X