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    Old geezer intro

    Hi fellow wheel-persons.

    I'm in my sixties, have worked in several bikes shops and even a bike factory, but it's not my profession. In the past, I commuted by bike on Long Island NY, in Washington D.C., Los Angeles, San Jose, and Rochester NY.

    I'm hoping to motorize a newly acquired Priority Eight, keeping the dreaded belt if at all possible (but willing to chain). Dunno yet about BBS02 (has been with a belt on similar frames), or BBSHD.
    Intro: http://electricbike.com/forum/forum/...ntro#post17033
    First build, Priority Eight / BBSHD / Nexus IGH
    Second build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
    Third build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH

    #2
    Welcome!

    You could start here: http://electricbike.com/forum/forum/...the-extra-cost

    and: http://electricbike.com/forum/forum/...ight-bbsxx-kit

    and: http://electricbike.com/forum/forum/...d-installation

    and our build gallery :

    http://electricbike.com/forum/forum/...ible-pictorial

    http://electricbike.com/forum/forum/...and-bbso2-kits

    Hope that helps

    Seb

    Comment


      #3
      I have heard that it may be possible to keep the belt if you choose a BBS02, but you must do some homework to make sure the working combination will fit the parts you already have.

      Comment


        #4
        Thanks for the welcomes and information! I have seen some very brief references to BBS02 / gates belt commuter bike builds with the hard to manage Shimano IGH 44.5 chainline, one being a Spot Brand Ajax. The writer said, "Gates center track is the key", but not why it is the key. My understanding is the belt drive has to be "right on the money" or squeaking and other, badder things will happen.

        My build platform is not the best, but I'm willing to upgrade components as needed. I'm also willing to lop off 5-6mm of the drive side bottom bracket tube, as it appears that the frame can handle it, and there are no seat stay issues. Would doing so get me into the chain line ballpark for a BBSHD, I don't know.

        It's probably rather silly to fight to keep the belt (other than for the engineering challenge), and I don't have complex, custom machining resources. So, the chain, or BBS02 are still on the table.

        I'm green but keen.
        Intro: http://electricbike.com/forum/forum/...ntro#post17033
        First build, Priority Eight / BBSHD / Nexus IGH
        Second build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
        Third build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH

        Comment


          #5
          Hi and welcome ncrkd,

          Just an observation: On the BBSHD, the Luna Aluminum chainring adapter will take the 46 tooth CDX sprocket turned to be furthest inboard. It barely clears the little hump on the gearhousing on the BBSHD, but that puts the belt a tad closer inboard than the chain would be.
          ​​​​​​​
          I am actually going to end up going with a CDX sprocket of 55 or 60 teeth for the Alfine Di2 because i need(want) it to come in another 1.8 mm (so if you want to buy my 46T sprocket CHEAP...).
          I am considering mounting the 28T Di2 rear sprocket inside-out to gain a little more alignment, though Gates indicates they are directional... http://www.gatescarbondrive.com/~/me...-di2.pdf?la=en , http://www.gatescarbondrive.com/~/me...2016.pdf?la=en.

          Bernie

          Comment


            #6
            Hi Bernie! Thanks very much for the info and pictures - any rough idea what the beltline ends up being? High forties?

            I've been considering going big on the pulleys too, especially the back, because I had the thought that it may be easier on the belt not to be curved so small.

            I don't have the drive (or any related components yet) so it's all mental / paper fiddling. I have on order a relatively inexpensive (compared to Park or campi) BB tap & face set just in case I have to relieve the BB.
            Intro: http://electricbike.com/forum/forum/...ntro#post17033
            First build, Priority Eight / BBSHD / Nexus IGH
            Second build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
            Third build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH

            Comment


            • Bernhardgrave
              Bernhardgrave commented
              Editing a comment
              Hi ncrkd.
              So, not sure what you are referring to when you reference beltline at a number like forty - please explain?

              This project I am attempting to mount the belt to is like yours in that it is mostly on paper and fiddling, a little at a time with the parts as I get them in. But then, while waiting for my Soma Wolverine belt-drive frame, I went and mounted the BBSHD I had onto my Tern cargo bike and I love it! ( http://electricbike.com/forum/forum/...ode-cargo-bike ). I have my BBs02 that I had been living with as a commuter on a another bike and thought that was the ultimate, but the difference in the two drives is very noticeable, so much more power and I don't seem to use any more battery power getting the heavy cargobike to work and back. This thing is such a blast I am only finishing the Wolverine belt-drive project out of principle now (and so that I always have a back-up ride.)

              My own reasoning for going with a bigger pulley was because the BBSHD is just so darned powerful it outruns my pedaling the way I have it programmed, even on the heavy cargo bike (I don't have the throttle on mine - just use the 3 level PAS). That, and from the looks of having mounted the front pulley on my current BBSHD just to see where it ended up made it seem like it needs to go a little more inboard for the straightest possible belt path, and a bigger pulley for the Alfine Di2 is the only one that can do that, unless maybe if I go with a CDC front sprocket, but I will only be able to determine that after I get my Alfine 8 speed wheel back from being dished to center it in the frame, then I can see where the rear pulley will be in relation to the BBSHD mounted (it just came today, so I am going to start a thread on that build this weekend, and I will share the observations I can make (or measurements you want or need me to share) then - Like hopefully I won't have to trim down the bottom bracket!

              Cheers,

            • ncrkd
              ncrkd commented
              Editing a comment
              Hi Bernie - sorry for the delay - what I meant by "forty" is the ever-problimatic beltline or chainline measurement maybe being in the high 40mm.

              I've decided to move forward with my little project, and an HD mid-drive is on order. I'm going chain for now, hoping to easily hit a 44mm beltline with the Eclipse 42 tooth and a 20 tooth on the hub.
              Last edited by ncrkd; 09-18-2016, 01:33 PM.

            #7
            Big pulleys heavier loads. Wishing the best and watching to learn!

            Comment


              #8
              welcome ncrkd, thanks for bringing your project here for us to watch. belts are probably better. e-rod

              Comment

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