As you all may know, with BN220s not being produced within foreseeable future, there is a void of good ~220 mm Caliber II style RKP hangers for street boards. 3D Servisas stocks them but is pricey. You can get TKPs of similar size, but I personally don’t like TKPs. I just think kingpin axis (bushing compression) and pivot axis should be perpendicular for optimum bushing compression.
Anyway, I mixed and matched trucks from BKB (BKB 236mm) and Torqueboard’s motor mount and wanted to document my experience for others looking for a similar setup.
First, if you are using dual motors of 6374 or less, you can just get Torqueboard’s 218mm trucks and their matching motor mounts. However, I had dual 6384s laying around, so I opted for BKB 236mm. BKB 236, however, has very short section where you can clamp your motor mounts. The truck gets thicker than standard Caliber II after this point. This is designed to work with their proprietary motor mounts that does not require much clamping area (Dickyho style) that they don’t sell individually. So I Dremel’d the crap out of the hanger to reduce the thickness of the hanger and was able to clamp on Torqueboard’s motor mount. I ground off 3 flat sides and left the curved side of the hanger alone. You just have to take your time and make sure you leave a smooth and flat surface after grinding if you don’t want the mount to clamp on all wonky.
Second, Torqueboard’s motor mount has a lip around the edge that will prevent some motors from sitting flush. BN/Flipsky style motors have a chamfer around the motor face that interfaces nicely with it, but Maytech or Reacher motors interfere with it. You may have to grind off the lip depending on your motor.
Third, BKB 236s have criminally short axles (32 mm of usable length), so you need wheel pulleys with minimal stack height and standard street thane wheels only. Evolve’s pulleys didn’t work for me, but BN’s CNC pulley did. Barely enough length for speed rings, let alone axle spacers.
It was a lot of head-scratching grinding, but hope this helps others trying to build a street board drivetrain. Probably easiest option is Torqueboard’s trucks and motor mounts and sticking to 6374 or smaller motors (which is absolutely plenty).
