9C motor wheelbuilding help in Seattle

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puregsr   100 W

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9C motor wheelbuilding help in Seattle

Post by puregsr » Jan 26 2016 1:30am

So my yescomusa 48V 1000w 9C rear wheel self-destructed some time ago, slicing my tube open and left me stranded, not to mention Slime everywhere.
So I'm trying to decide what to do next.
1) Where is a good place to bring it to to get it laced up in Seattle, WA? Would regular bike shop have the experience in building electric hubs?
2) Would anybody with experience willing to help me and teach me how to lace it up including new rim and spokes here in Seattle?

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amberwolf   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by amberwolf » Jan 26 2016 2:53am

Can you get up to Vancouver? If so, take it to Grin Tech / ebikes.ca. :)

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dogman dan   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by dogman dan » Jan 26 2016 7:39am

If nothing else, you can source your new rim and spokes from Grin. Then shop around for the best shop to get it laced.

Anybody know which bike shop in Seattle is good? Won't freak out on a motor lace?

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Icewrench   10 kW

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Re: 9C motor wheelbuilding help in Seattle

Post by Icewrench » Jan 26 2016 10:29am

The Downhill Zone laced up a few hub motors for me.
But they left the U district for Issaquah.
I`ve been building my own since then.
A spoke calculator sure helps to get the right length spokes.
Then it is just a slow repetitive process for me.

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wesnewell   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by wesnewell » Jan 26 2016 1:54pm

It aint rocket science.
https://www.youtube.com/results?search_ ... +hub+motor
Just start with a decent rim and spokes. I'd suggest a rim with a minimum 25mm inside width for up to 2.25in tire. I found 32mm works best for 2.0" - 2.5" tires.
Any spoke calc to get the proper spoke length. Type golden in the hub search here for the proper hub measurements.
https://leonard.io/edd/
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Mongoose 26" Ledge 2.1 mtb bike $99, yescomusa.com 48V 1000W rear hub kit $200, Hua Tong 72V 40A controller $35, 10ah 24s lipo $217=~43mph, range=45 miles @ 20mph. 25K miles and still going strong.
Huffy Fortress 3.0 with MXUS 3000 4T motor, 24s lipo, 96V 60A controller. Total cost with extras <$700. Top speed ~50mph
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green79   10 mW

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Re: 9C motor wheelbuilding help in Seattle

Post by green79 » Jan 26 2016 1:56pm

Check out Henry Kellogg at Liontails cycles. I've had him build me an electric hub motor wheel. Good guy and fair prices and lots of experience with electric hub motor builds.


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dogman dan   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by dogman dan » Jan 29 2016 8:04am

It is pretty easy to build a wheel, once you understand the 4 spoke pattern lacing is not hard.

Truing another thing, but once laced, and lightly tensioned, just about any shop should be willing to true it. And one thing not always obvious, truing a bent rim wheel is very hard, even impossible. But it goes pretty easy when you start with a straight rim. Give it a try!

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Ykick   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by Ykick » Jan 29 2016 8:30am

It may seem obvious but I find myself often repeating the advice of practice, practice, practice wheel truing. And it doesn’t need to be only hub motor wheels.

There’s always a bicycle wheel out there perfect for learning and “practicing” how to true spoked wheels.

Once a person understands the process and how to shift the dishing around a bit, it makes life so much easier/better.

Then you can move on to doing lacing which for single cross (majority of hub motors) is very easy. In fact, 1 cross hub motor wheels are perfect for beginner wheel lacing IMO. Much easier to wrangle than a 3-4 cross pattern.
Last edited by Ykick on Jan 29 2016 11:13am, edited 1 time in total.
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bowlofsalad   1 MW

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Re: 9C motor wheelbuilding help in Seattle

Post by bowlofsalad » Jan 29 2016 10:09am

http://www.wheelpro.co.uk/ A good book on wheel building, excellent ERD measuring technique along with how to make all the tools you need for super cheap and other good bits.

http://www.amazon.com/gp/product/B004H1 ... 4I2OMBM6IM
http://www.amazon.com/gp/product/B00H49 ... QHCZ6GKO3F
Great wheel building videos really worth watching.

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teklektik   10 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by teklektik » Jan 29 2016 10:31am

Here's a post on my version of the WheelPro truing stand described in the Musson's Wheel Building book and a few notes on other ES threads, commercial stands, tension meter, etc.
Visit Grin Technologies at www.ebikes.ca
Build Thread: 2WD Yuba Mundo V4

puregsr   100 W

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Re: 9C motor wheelbuilding help in Seattle

Post by puregsr » Feb 02 2016 6:08am

So I've decided to buy the parts from ebike.ca, seems like it's the only place that sells custom length spokes with my short search.

Alex DM24 26" rims and 166.1-166.6mm spokes depending in/out or 1 cross alternating (how it came from the factory). Somehow I remembered that it wasn't centered correct and thought I had to dish it correctly with a rebuild, but just tried it on again and it seemed to be centered with same number of spacers on both sides.

Would 13g spokes be enough without modifications?
Should I buy 167mm or 166mm?

Still can't believe that I shattered part of the rim that easily while riding top speed, hopefully it was just the cheap rim from the factory. I didn't remember hitting anything hard. I hope it'll be worth my time and money rebuilding this hub motor.

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Ykick   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by Ykick » Feb 02 2016 7:04am

1-2mm too short spoke is better than 1-2mm too long IMO.

I also avoid 13ga straight spokes because they don’t tension enough for my taste plus it rules out any emergency “repair” possible using scavenged 14ga spokes. See photo.
SpokeFix2.jpg
SpokeFix2.jpg (46.21 KiB) Viewed 1046 times
Need a temporary spoke? Good luck finding one that matches 13ga nipples. 14ga nipples? Plenty junk/old wheels laying around with enough spoke length to perform a ghetto repair similar to the wheel in my photo.

Danscomp is the USA place I order custom 13/14ga Sapim stainless single butted spokes. https://www.danscomp.com/shop-PARTS/gro ... pokes.html

They’re not listed on the spoke page and you must ask for them by name when you call to order and provide your length. They’re 50 cents each - I just ordered and received a set of 36qty last week shipped fast under $25.

Remember, you’re not going to “nail” everything on a maiden wheel build but if you’re careful, methodical and have decent mechanical aptitude, you can do a good enough job for 1st attempt.

Lotsa advice out there. All I can say is I've now performed over dozen motor wheel builds plus a couple regular 3 cross. My last motor wheel absolutely nailed overall length(s) and slightly different L/R length to account for dishing. I'd built the same exact motor/rim before and remembered how spoke lengths' could be adjusted to fit better. This go around, perfectly filled nipples without any excess sticking out.

Oh, and don't forget a layer or two of cloth hockey/sports tape or cloth Gaff tape for rim strip...
puregsr wrote:So I've decided to buy the parts from ebike.ca, seems like it's the only place that sells custom length spokes with my short search.

Alex DM24 26" rims and 166.1-166.6mm spokes depending in/out or 1 cross alternating (how it came from the factory). Somehow I remembered that it wasn't centered correct and thought I had to dish it correctly with a rebuild, but just tried it on again and it seemed to be centered with same number of spacers on both sides.

Would 13g spokes be enough without modifications?
Should I buy 167mm or 166mm?

Still can't believe that I shattered part of the rim that easily while riding top speed, hopefully it was just the cheap rim from the factory. I didn't remember hitting anything hard. I hope it'll be worth my time and money rebuilding this hub motor.
Talent must not be wasted.... Those who have talent must hug it, embrace it, nurture it and share it lest it be taken away from you as fast as it was loaned to you.

- Frank Sinatra

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Chalo   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by Chalo » Feb 02 2016 11:58pm

puregsr wrote:So I've decided to buy the parts from ebike.ca, seems like it's the only place that sells custom length spokes with my short search.
I wish I'd noticed this thread earlier. Your first resort for wheelbuilding needs (and pretty much any other bicycle related needs) should be Aaron's Bicycle Repair in White Center. Aaron Goss has a spoke cutting machine plus more expertise than anyone in, well, the continental USA more or less. Don't hesitate to consult him in the future.

You can't go wrong dealing with Grin, but Aaron is local to you and that's an advantage.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

puregsr   100 W

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Re: 9C motor wheelbuilding help in Seattle

Post by puregsr » Feb 03 2016 6:27pm

So is there any disadvantages using 14g spokes instead of 13 or 12 besides the need for washers? Just seems to be a lot of trouble to use and find 12g or 13g.

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Chalo   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by Chalo » Feb 03 2016 9:19pm

puregsr wrote:So is there any disadvantages using 14g spokes instead of 13 or 12 besides the need for washers? Just seems to be a lot of trouble to use and find 12g or 13g.
There are only advantages to thinner spokes, down to about 15ga. Thinner spokes allow the same rim to carry bigger loads more reliably, because they spread forces across more spokes at a time and they resist unscrewing.

Aaron's Bike Repair has 13-14ga, 14ga, and 14-15ga blanks. If you want to do the build yourself, Danscomp.com has the same gauges and cuts to order for amazingly cheap prices.
Last edited by Chalo on Feb 04 2016 3:40am, edited 1 time in total.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

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Ykick   100 GW

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Re: 9C motor wheelbuilding help in Seattle

Post by Ykick » Feb 04 2016 12:05am

I only bother with 13/14ga butted spokes because I’m unsure about where to find the right size/material washers to fit under the spoke head in the motor flange.

One of these days I intend to solve the washer conundrum and use plain 14a spokes which only cost 20 cents each. But for now, I use 13/14ga 'cause they “fit” my current needs.
Talent must not be wasted.... Those who have talent must hug it, embrace it, nurture it and share it lest it be taken away from you as fast as it was loaned to you.

- Frank Sinatra

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