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  1. D

    As if I don't have enough projects: time for my first ebike build!

    Torque arm installed. Had to do a tiny bit of filing to clear the rear derraileur arm, despite all the different angles the Grin V5 can mount.
  2. D

    As if I don't have enough projects: time for my first ebike build!

    I was just researching torque arms from Grin Technologies. The V5 model seems like it would be most compatible with my rear rack.
  3. D

    As if I don't have enough projects: time for my first ebike build!

    DIY ebike achievement unlocked! Scrounged up a 7-speed freewheel and replacement M14-1.50 axle nut and was finally able to mount to my 1992 Trek 720 Multitrack. In my initial tests, top speed appears to be about 25mph. 3D printed a custom controller mount, and custom rack battery mounts are on...
  4. D

    [$89 plus shipping. USA BASED] 48v 15ah 720wh 60A Li-Ion Battery, 2500 mAh cells, 13s6p configuration

    @AmericanElectricSolutions Your original post mentions 4A max charge rate, but the battery itself says 2.5A max charging current. Where did the 4A number come from? I tested charging through the smaller charging leads at 4A before I realized the discrepancy, but don't want to cause any...
  5. D

    As if I don't have enough projects: time for my first ebike build!

    Successful first bench test! Happy to see the used motor is functional, especially after having to undo the clutch modification.
  6. D

    As if I don't have enough projects: time for my first ebike build!

    Good find on the battery pack fuses! It looks like the XT60U connector between the battery and controller (XT60U-F AMASS - Plug | DC supply; XT60; female; PIN: 2; for cable; soldering; yellow | TME - Electronic components) is rated for 30A continuous, though I still need to incorporate an...
  7. D

    As if I don't have enough projects: time for my first ebike build!

    According to the seller's description for my battery packs ([$89 plus shipping. USA BASED] 48v 15ah 720wh 60A Li-Ion Battery, 2500 mAh cells, 13s6p configuration), the packs have a discharge rate of 60A continuous or 90A peak (720W continuous or 1400w peak). To me, it seems the 25A-output motor...
  8. D

    As if I don't have enough projects: time for my first ebike build!

    Thank you for the very helpful context! And given your points, I think I will hold off on adding a CA. One thing that most ebike wiring diagrams don't seem to include is a fuse. And because my controller doesn't have an ignition switch connector like newer controllers, I figure I will add a...
  9. D

    As if I don't have enough projects: time for my first ebike build!

    After some additional messing around with it, I was able to free up the clutch! Must have been some remaining bits of JB Weld holding things together. Honestly, I'm going for as simple a system as possible. The throttle has three voltage indicator lights, so I was mostly unsure if the CA would...
  10. D

    As if I don't have enough projects: time for my first ebike build!

    Hi all, I--like many of you, I'm sure--decided to add another new project to the queue. Though I have some electric motorcycle experience (I installed lithium modules into my Vectrix VX-1), this will be my first ebike build. The plan is to electrify a steel Trek hybrid. So far, I have collected...
  11. D

    [$89 plus shipping. USA BASED] 48v 15ah 720wh 60A Li-Ion Battery, 2500 mAh cells, 13s6p configuration

    I got a couple of batteries from them, but there was wire/connector damage. I messaged them on October 13 but have not heard back.
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