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Will Luna Eclipse mate to 130 BCD 5 bolt Gates CDX sprocket?

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  • under_cooked
    replied
    Looking into adding a bbs02 to a bike with alfine 11. Anyone knows if alpinist or Outsidediameter are still around?

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  • spinningmagnets
    replied
    Quiet? You can have 7000W system but as long as you ride safe and pedal along, the police will leave you alone...
    Last edited by spinningmagnets; 02-18-2017, 10:18 AM. Reason: speling

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  • RusticoRay
    replied
    I ended up with a decent beltline. Like I mentioned I had to cut 7mm from the drive side bb and make it up on the non drive side with a spacer. Also made a torque bar to add stability. Ended up flipping the 22t rear cog and milling 90/1000th out of the center to weld it to a nexxus 3spd igh. I still need to make up a belt tension adjuster for the non drive side, have to work around the yellow axle washer that goes inside the dropout slot. I had to modify a origin 8 chain adjuster on the drive side a bit. Had to cut the front channel off so the axle nut sits deeper and allows the shifter housing to lock down.
    I went for a short run around the neighborhood yesterday and it is so quiet it feels absolutely strange compared to the 2 stroke world of friction drive bikes I'm used too.

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  • Outsidediameter
    replied
    Ya gotta do the math, a simano three speed chainline will be way inside a bbs xx beltdrive . No offset is optimum and Gates recommends no more than 2 millimeter offset I believe

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  • RusticoRay
    replied
    I'm waiting on a few more pieces but determined to get a belt driven bbshd operational. This Is definately not a bolt on operation. I got a e-rad adapter and a 60t pulley on the front. I cut 7mm of the bottom bracket and won't know if I need a bit more until I get the rear 22t on the nexxus 3 igh. The EVWARRIOR came with only one chainstay. I cut it off and welded horizontal dropouts. No need to split the back. I still have to make a adapter maybe the chain cog will work(seems sloppy though) to get the 22t sprocket line. 125 t belt is due in today, so more challenges to overcome. First ebike build and looking forward to a quiet ride.

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  • Outsidediameter
    replied
    Rustico,if you take a steel frame with a 68 millimeter bottom bracket and stretch the rear end out to 170 millimeters the lineup will work good with the new 36 spoke sturmy archer 3 speed.Weld in the seatstay splitter after stretching and aligning dropouts. 3" tires max probably.

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  • RusticoRay
    replied
    Looking at belt drive bbshd. Provided I could get belt aligned with a 3spd igh what would be a close match pulley wise front and rear to get it close to the stock front and say 18t rear cog. Mostly street use, small hills and limited trail use.

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  • MsCynthia
    commented on 's reply
    Faraday has a couple of models with belt drive and an IGH......and a 250-watt front hub motor with a 306Wh battery for $3500.

  • FatMarty
    commented on 's reply
    That sure is a pretty chain line. :-)

  • Outsidediameter
    replied
    When running wider chainline oneshould keep in mind that a 135 mm quick release hub is no more "standard" than a 12x150 mm downhill hub.12x148 and 12x157mm are some more thru bolt option hubs with solid clickers. Check out dt swiss,hope,white ind.,Hadley etc. These will take some serious newtons from your mid Drive and the belt softens out would be chain jerk too. Hope this helps. ...

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  • Alpinist
    commented on 's reply
    Hi O.D., yes that is how I see it too and I come up with the same math. Unfortunately the only way I see a belt working is having a beltline in the 50's range. Thus a 3 speed hub or a Rohloff or... something that gives you the ability to shim the cog outboard. My nuvinci N360 hub will never get there :(. I will say that the chain drive BBSHD and Nuvinci works superbly. I have over 2k mi on it and going strong. Broke one chain, but that was my fault for standing on the pedals up a hill while at full throttle and on a worn out chain... hehe.
    Saving up for a rohloff one day. until then, I will ride my 30 miles a day commute with a chain drive and enjoy the near silent fun times.

  • Outsidediameter
    replied
    Seems S/A has a fat 3spd that Karl reviewed. Probably nice but the SS does the job for me on a light bike.

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  • ncmired
    replied
    HI Alpinist - you've done the math - am I wrong in thinking that, given a standard, not modified (cut back) 68mm bottom bracket and a BBSHD, one could never reach a mid-forties chainline, regardless of what configuration of parts you tried.

    I say this as I measure my unmodified 68mm BB with a BBSHD (no spacers), Eclipse chain ring / Nexus IGH), and currently ~45-46mm chain line. The 3/32 (2.4mm) chain barely clears the center nub on the BBSHD motor spindle axis. There's no way one could cram a 12mm wide belt in there (4x the chain width), using a sensible diameter belt pulley - based on this I estimate the very best chainline you could get with a belt is the very high forties, and at that the belt would be rubbing on the motor spindle nub.

    The nub / chain clearance:
    Click image for larger version

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    Unless you're willing to chop back the BB ...
    Last edited by ncmired; 11-04-2016, 06:25 AM.

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  • Alpinist
    commented on 's reply
    Nice work Outsidediameter! How do you like 3 gears... using a Stermy-Archer 3 speed right? Beltline is way more favorable than my Nuvinci which has a 45.5 mm beltline (ouch).

  • Outsidediameter
    replied
    Ok,beltdrive up and running. 30 plus miles an hour(private property) until the little mini Cube ran out @ 30 amps continuous.Belt did not have issues- off road some mud and rocks at mostly full throttle .NO chain jerk/slap, dead silent. Flying on single speed 55t front 24t rear.

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