coolbobjoe
1 W
- Joined
- Jul 6, 2017
- Messages
- 62
Looking into the newer QS Motors line with 200mm dropout widths for a custom Ebike project based on the A2B Octave/Metro Frames.
Have developed newer 1/4" 4130 dropouts for both sides of the swingarm but am now looking to stretch the dropouts width from 155mm to 200mm to accept their higher torque motors. I can get 200Nm of torque roughly out of their 155 versions but 350!!! from their 200mm versions. Cold-setting is most likely not going to work as its 45mm of stretch on a hefty aluminum swingarm when only 15mm works on small road bike frames. Heat-treatment after and/or before seems necessary. Near the silicone valley area so manufacturing/prodtuction will be easy enough once I get a game plan going. what does ES think?
Have developed newer 1/4" 4130 dropouts for both sides of the swingarm but am now looking to stretch the dropouts width from 155mm to 200mm to accept their higher torque motors. I can get 200Nm of torque roughly out of their 155 versions but 350!!! from their 200mm versions. Cold-setting is most likely not going to work as its 45mm of stretch on a hefty aluminum swingarm when only 15mm works on small road bike frames. Heat-treatment after and/or before seems necessary. Near the silicone valley area so manufacturing/prodtuction will be easy enough once I get a game plan going. what does ES think?