Damn... a beauty will be born. (26 to 27.5 conversion!?)

[markz]

Just keep in mind..
You will lose a little torque if you go up one wheel size.

Which correlates to more time getting up to maximum speed on a wide open throttle.
I'd love to compare, by riding, the exact same controller and motor in a 26" compared to a 24" then a 22" on the exact same terrain. It'd be a neat learning experience.

 

[BestBoy]

The bigger wheel would surly mean higher top speed (albiet at the mercy of losing torque).
I'm currently struggling with simpler issues than wheel rebuilds etc...
The damn valve in the conversion motor wheel pulls itself back into the rim when inflated, meaning that I can't top up air because I cant get enough hold of the valve! What the hell!?

 

[Chalo]

The damn valve in the conversion motor wheel pulls itself back into the rim when inflated, meaning that I can't top up air because I cant get enough hold of the valve! What the hell!?

You need a tube with a longer valve. Because deep rims have come into common use, there are now tubes with Schrader valves 48mm long.

 

[MadRhino]

Yep, long stems, metal stems, with retaining nut

But, if you want to live with the short stem until the next tube, inflate with a screwing inflator fitting. CO2 inflators are commonly made with those, but some pumps are too, and the fitting is available for compressor hoses.

 

[BestBoy]

Nice one. Yeah, Ill swop over to a longer valve soon. My 'controller case' arrived today from China.
It was the best one I could find with the potential to fit. It turns out it was about 3mm too small so I had to adapt the interior.
I also had to remove all the wires I dont use from the controller... pedal assist... brake levers... 'lamp'... so I had a tiny bit more space.
I bolted it to the frame and cut and reconnected (soldered) every internal wire to lenght as there was zero room to stuff cables inside the case. The kit came with really really long cables. SO, I've only one connection to tidy up and thats the main power lines.

I hate connecting thick wires. Dont have anderson connector tool...
Considering just soldering the main power leads together without a connector block... Determinded to keep this build 'clean' looking.

14s4p with 1000W motor 52V.

 

[wturber]

... They're certain trouble. [Chinese hub motor kit wheels]

Maybe they are likely trouble, but certain trouble? I dunno. I just crossed the 4000 mile mark on mine this week. Maybe I'll start popping spokes tomorrow? <shrug>

Well, let's just say that the ones I see in the shop are either in the process of unscrewing themselves, or the nipples are corroded to the spokes.

But most of the bikes that have them have come into the shop for some other problem. So I guess their owners don't think of them as trouble.

In the interest of full disclosure and accuracy, I've been trying to track down this little exchange for a while now. I couldn't remember the context.

Anyway, as fate would have it, shortly after this exchange and at around the 4200 mile mark I broke a spoke. It broke at the bent shoulder. The spoke size is pretty non-standard, so I ended up riding over 100 miles with that one broken spoke before I could get a replacement. I found a guy on ebay that I can heartily recommend. He'll custom cut spokes in lots as small as 4. I ordered 8 12g Sapim Leader Stainless for about $5. Shipping was about $5. I received them about 2-3 days faster than promised.

You can find his website here:
http://www.yojimbosgarage.com/blog/

... and his ebay store here:
https://www.ebay.com/usr/yojimbos_garage?_trksid=p2057872.m2749.l2754

Anyway, when I replaced the spoke I noticed that the tone of the various spokes on the rear wheel were not the same. So I evened them up as well as I could by ear and I think I stress relieved them all. I kinda figured that once one spoke let go others would soon follow - especially when riding with the one missing spoke. But so far that hasn't happened. I'm at the 4600 mile mark. The wheel still seems about as true as it has always been. I figure that once/if I have to replace seven more spokes, I'll just get the wheel rebuilt and/or buy a spoke tension tool. Maybe I'll get to 10,000 miles on the wheel before then? Time will tell.