Obiwan007
1 kW
Hey, all. I am getting into the meat and bones of my current build and need some advice. The project is a Giant DH Team/V2 Cromotor/18s2p 16ah. So I was aware of the asymetrical swing arm of the Giant DH Team but when I first saw this frame the amount of offset seemed relatively small. I decided to try to measure it exactly the other day and used this procedure. I drew a straight line on a long piece of paper and set the bike on top of it. I then put the exact center of the bottom bracket on the center of the line. I then used a plumb bob off the center of the head tube an lined it up on the same line. So this gave me a straight line that passed from the center of the head tube, through the center of the bottom bracket and extending to the rear of the bike past the drop-outs. I then measured from the drop-outs to this center line on each side. I took these measurements with the Kiwi adapters installed so the left dropout distance becomes a little less. So I got a measurement of 50mm from the left drop-out to the center line and 82.5 mm from the right drop-out to the center line. So an off-set of 32.5mm!! That seems HUGE! To make things worse, the V2 Cromotor is apparently a centered motor configuration. My current problem for getting this completely figured out is that the Cromotor is apart on my bench right now so I can't take accurate measurements until I get it back together (have to replace two shattered magnets and am still waiting for the replacements). But if the motor is centered, as the liturature I have read says, then that means I have to make up 32.5mm in dish on the wheel build right? Using the various spoke calculators, 15mm was about the max dish I could get and that made the left side spokes almost verticle. I subpose I could put all spokes through the hub from one side to gain a few extra mm but that still leaves me pretty far from centered. So has anyone dealt with this issue? I can't be the first to use a V2 Cromotor on a Giant DH comp/team frame can I? When looking at the frame even now it sure does not look like that much off-set. I wanted to get a head start and order the spokes for the wheel build but now I feel like I need to get the motor back together and mounted to really get a good look at how it will center between the chainstays. I talked this over with GCinDC a little and he is running into the same issue with the H4080 motor he plans to install (apparently it is also a centered motor configuration). If anyone has any experience in this area I would sure like to hear about your experience. Obiwan