Announcement

Collapse
No announcement yet.

2017 Breezer Downtown 8 ST and BBS01

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

    2017 Breezer Downtown 8 ST and BBS01

    BBS01 motor kit from California ebike, 36v battery and 42t chainring from Luna. I discovered the BB was 73mm so I bought some 5mm longer M6 screws and washers from a hardware store to mount the fixing plate and had to omit the second M33 locking nut. I needed to replace the Breezer chainguard so bought an Hebie chainglider from Bike24, 700c Schwalbe Marathon tires, gearsensor, 21t rear sprocket, KMC ebike chain, Ergon grips, VP flat pedals for my big feet, Busch and Muller battery lights, Wald basket, u-lock holster, Brooks B66S saddle required a replacement seatpost.
    Last edited by Dewey; 03-19-2019, 05:21 AM.

    #2
    Very nice and practical bike - thanks for posting about it. I'd like to get one of those Hebie chaingliders for at least my step-thru build - any post-install issues?

    Hopefully the Breezer wheels are better built than my Priority 8 (and some others seen here) had. It's probably best to keep an eye out for loose/broken rear spokes.
    2nd build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
    3rd build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH
    4th build, 2016 Salsa Marrakesh flatbar frameset, BBSHD, Alfine 8 IGH

    Visit the forum knowledge base

    Comment


      #3
      Only installed the chainglider this morning but it was quiet on the test ride. Thanks for the heads up on the spokes, I have a spare Nexus 8 IGH 700c wheel I can use if it comes to that.

      Comment


        #4
        I forgot to ask - looks like you used a Luna 104 chain ring adapter with a raceface (42, 44?) ring, and you have a 73mm BB - do you know offhand what the front chain line ended up being? Did you go with the dished rear cogs?

        Unfortunately, there's not a lot of chain line data on the BBS01/02 and the respective adapters.
        2nd build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
        3rd build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH
        4th build, 2016 Salsa Marrakesh flatbar frameset, BBSHD, Alfine 8 IGH

        Visit the forum knowledge base

        Comment


          #5

          Sorry I didn't measure the front chainline before I installed the chainglider, if it would help I can get out a ruler and measure the distance from the center of the downtube to the middle of the chainglider to give you a rough measurement?

          Originally I had a Lekkie 42t ring fitted to the BBS01 on my old bike, that pushed the front ring chainline in by 9mm, but Lekkie offset rings are too wide for a chainglider so I went with the Luna 104 4-bolt adapter and Luna's own narrow-wide 42t chainring. My local bike shop fitted a 21t rear cog to replace the 18t Breezer had fitted, to get the 2:1 ratio Shimano recommend for Nexus IGH. Sheldon Brown's site says Nexus and Alfine both require a 3mm dished sprocket.

          Comment


            #6
            If you get a chance to measure / document it, it would be good to have. The Nexus/Alfine tight chain lines are hard to hit with the BBS01/02 motors, chainline-wise.

            You added, "Lekkie offset rings are too wide for a chainglider" - crap - I was afraid of such an issue.

            I've got a pretty good handle on the chainline with the BBSHD motor (easy with the Eclipse chainring).

            There's a lot to do between the chain line, gear ratios and individual unit weaknesses, to build a reliable IGH/BBS setup. But, I think an IGH makes more sense under motor power that an open, twisted chain 9-10-11 gear derailleur setup.
            Last edited by ncrkd; 03-15-2019, 12:35 PM.
            2nd build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
            3rd build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH
            4th build, 2016 Salsa Marrakesh flatbar frameset, BBSHD, Alfine 8 IGH

            Visit the forum knowledge base

            Comment


              #7
              The center of the seat tube to the center of the chainglider is 50mm, measured from behind the seat tube.

              Comment


                #8
                Thanks! I was guessing at least high forties.
                2nd build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
                3rd build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH
                4th build, 2016 Salsa Marrakesh flatbar frameset, BBSHD, Alfine 8 IGH

                Visit the forum knowledge base

                Comment


                  #9
                  Just measured the center of the Nexus 8 IGH to the center of the rear section of the chainglider and it is also 50mm

                  Comment


                    #10
                    I'm guessing that your LBS set that 21 tooth sprocket dish-out, and it's actually 48mm (per Sheldon Brown's 42-45-48 specs.
                    2nd build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
                    3rd build, 2018 Crust Evasion step-thru, BBS02, Shimano Nexus INTER-3 IGH
                    4th build, 2016 Salsa Marrakesh flatbar frameset, BBSHD, Alfine 8 IGH

                    Visit the forum knowledge base

                    Comment

                    Working...
                    X