GiantEV
100 W
Rix said:Giant EV, here you go
Effective Rim Diameter 471mm
Hub Flange Diameter 232mm
Flange Spacing 46mm
Diameter of a spoke hole 4mm
Cross pattern cross 1X
Number of spokes 36
Calculated Spoke Length: 132mm
Break down. I measured my 19x1.4 PW with 18mm spokes 17.125 inches. Converted to mm and multiplied by 25.4 gave me 435mm rounded up, then added the length of the nipple X 2 for 36 and ERD came out to 471mm. Glad I measured it, for some reason, I had 477 stuck in my head. The 4080 and 4065 Hub flange spoke hole diameter from the Crystalyte's website states 231.2mm. I has spoken with a couple of 4065/4080 owners, they have reported 233mm based on their measurements, I spilt the difference and rounded to 232mm. Flange spacing is listed at 46mm. I find this strange because the much bigger 54xx series is 45mm. Lace patern is 1X, spokes 36. Your spoke length is 132mm as computed by the Justin's Ebikes.ca spoke length calculator. I have used Justin's online calculator on all of my MC hubbie wheel builds, its accurate and I have built 3 successful wheels using it. If there is a concern that your hub motor diameter is off my a mm, don't worry, that translates into only .5mm difference in spoke length. Not a big deal at all. Hopefully with in the next 2 weeks, I will have my 4080 and get it laced up to my 18x1.4 rim.
Ugrd, coming along nicely, please post some pics when finished.
Rick
Wow, thanks a lot Rick! That's very helpful.
I called VoltRiders yesterday but haven't heard back yet. Maybe I'll send them an email too. I've read up on wheel building, have a DVD on building wheels, and have a tension meter and spoke wrenches, although it seems like many wheel builders don't even use a tension meter. I haven't built a wheel from scratch before, but I've fixed wheels that are out of true and several with very loose spokes. I'm up for the challenge of building my own wheel and excited to try the 4080 on 20S lipo.
Have you guys seen this video before? I'm assuming he uses the drill to tighten the nipples until the threads aren't visible anymore to get consistency? I'll probably give this a try and make a bit that I grind down to fit the nipples like Sheldon Brown recommends.
[youtube]V31UHgrV8Zc[/youtube]