Angle drilled or standard drilled Brompton rim for Front motor?

wireman

Finding my (electric) wheels
Mar 14, 2014
15
1
66
Hello everyone. As a novice to the ebike scene, I'm planning my Brompton electric conversion. I' m either going to use a Keyde 80mm 250rpm motor that I have bought on ebay or buy an Outrider 80mm 260rpm from China. I'm leaning towards 260rpm and not 290rpm because I' m quite heavy at 200lbs and want to use the bike with reasonably strong peddle assistance mainly for hills. Perhaps I could also lace a 260rpm into my Dahon 20" as an alternative and remain legal for max assisted speed.
I am trying to choose between the brompton angled drilled and standard drilled rims. It seems to me that the angle drilled rims would only make sense for one particular lacing pattern and I'm guessing that the standard rim would be best. Although this will be my first ever wheel build I'm planning on a 'once crossed' lacing pattern. I know I have everything to learn at this stage but I am fascinated by this subject. Any thoughts would be much appreciated.
 

trex

Esteemed Pedelecer
May 15, 2011
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why do you want a new rim? the motor kit comes with the motor already laced to a 16" rim.
 

wireman

Finding my (electric) wheels
Mar 14, 2014
15
1
66
why do you want a new rim? the motor kit comes with the motor already laced to a 16" rim.
Trex: I really want the challenge of building a wheel myself, that's all. Last time I bought a kit from Greenbikekit the wheel build was quite out of true as delivered and took a while to true up.
I think I might have answered my own question here as I've just been studying the info on the Grin online spoke calculator and on spoke angle, the notes say that only with spoke angles of less than 75 degrees does angle become an issue at all. I think my spoke angle would be 78 degrees with the Outrider and 328 ERD 349mm Brompton double wall rim.
 
D

Deleted member 4366

Guest
I don't think it matters a hoot what spoke pattern you use. Don't go too thick on your spokes. 13g is a bit thick for short ones. They might not hold tension, so come loose. 15g would probably be the best, but there might be a danger of pulling through the motor holes. That probably means 14g will be the ones.
 
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wireman

Finding my (electric) wheels
Mar 14, 2014
15
1
66
Thank
I don't think it matters a hoot what spoke pattern you use. Don't go too thick on your spokes. 13g is a bit thick for short ones. They might not hold tension, so come loose. 15g would probably be the best, but there might be a danger of pulling through the motor holes. That probably means 14g will be the ones.
Thanks d8veh for that. Obviously the sort of wisdom that only experience can teach!
I suppose the simplest for a novice (like me) could be radial pattern in an a single wall Brompton rim. I'm thinking here of my fat fingers trying to insert the nipples through the two rim walls!
 

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