Category Archives: electric bikes

electric bicycles and similar low impact modes of travel

replacement battery back for greenewheels bike found

I just quickly dropped in the 36V 9AH LiFePO4 battery pack I got from Value E Bikes and was pleasantly suprised it was a close, though not perfect fit.

value E bikes batter on greenEwheels bike

It did fit well enough that I felt confident going for a short test ride, and all was good.
For a longer ride I’ll fir it more snugly with some rubber matting and ratchet straps, but the fit is quite close. The “rail” the battery has to slide into place is quite differently sized from the greenewheels rail however.

vale E bikes battery pack on greenEwheels bike

Next step, range tests, after a visit to the $2 shop for mounting hardware.

I did have to remove one of the cable holders as the battery is taller, so that the DC out lead would fit.

update 1 week later
We’ll I’ve clocked up 80k in a few rides to work and the battery is working great so far. I would have ridden more except its been rainy. Havn’t done a full range test but no apparent loss of power after 22km, so looking good.

opening up the greenewheels 36V 10AH battery pack

Some quick notes:
Battery contains 10 cells strapped together with blue heatsrhink plastic stuff.
Cells measure 4.2V (no load) so I’m guessing 3.7 V when loaded.
Sticker on it contains phone number from which I am able to determine the battery was sourced from here.

Info is:
Model: JX-6 JX-6
Brand: Xin power
Operating current is 6A; maximum discharge current of 15A; size of 32 × 55 × 70mm (length × width × height); weighs approximately 310 grams. May form a 7.2V/10Ah (2 series), 10.8V/10Ah (3 series), 14.4V/10Ah (4 string), 24V/10Ah (7 string), 36V/10Ah (10 strings) and other forms of power.

The dimensions mentioned also match the right dimensions from measuring one of the cells after peeling back the plastic wrapper. Still havent been able to get the whole pack of cells out as they seem to be glued in hard!

Googling around I see these cells available, which might be a very close match? the ones listed as LT-325570

Peeling back the plastic wrapping on one of the cells it just has a barcode and the numbers “070806B 325670 0115”.

Another option is to get a 36V 10AH pack from Ping. The one listed is too square, but this blog post indicates these packs work perfectly with the greenewheelsbike, and the comment indicates Ping will pack the batteries in a longer narrrower packing if requested:

I did write to Ping to see if he could make me one that would fit in the battery space better, to accomodate my narrower shimano bottom bracket. He was most helpful, and wrote back with this:

[Yes, we can make it in different size. We can make the 36v10ah pack in size of 300x105x80mm. Is it suitable?

battery faded, have been slack this year: time to get mobile again

Well my battery eventually faded.. first to the level where I had to charge at work.. but then to the level where I don’t have the range to get to work.. i.e. less than 11km.
This is fine as I have clocked up the amount of charges well into what the stated life of the battery is, but now I note GREENEWHEELS don’t sell anything on ebay any more – well his store doesn’t exist.

But I noticed FLEW ELECTRIC CYCLES appear to be selling the same or similar bikes as the greenewheels ones, including replacement battery packs.

I’ve tee’d up a meeting just to verify that a FLEW ELECTRIC battery pack works.. but if so this could be very good for other GREENEWHEELS owners, having a Melbourne located source of replacement battery packs, and other parts.

The folding bikes on the site look cute as well.

UPDATE checked out the battery pack thanks to the very helpful Tom of FlewElectric, but unfortunately the battery pack is a different design and dimension. Tom is checking out to see if he can source ones like mine, but in the mean time I will suss out what kind of cells are in the greenewheel battery pack.

bottom bracket worn.. got it repaired. Battery a bit weaker but still fine

Well its now well over a year of riding the greenewheels bike and still going well.

I did have to get the bottom bracket fixed, it had started getting very loose, though this is evidently quite normal “consumable” in any bike getting a lot of use. The bike shop didn’t have a replacement part as the greenewheels parts are wider due to the electric stuff (not quite standard size), but they have managed to repair what is there so it is fine. Next time I’ll sort out sourcing the part, there are enough ebike shops that it should be available somewhere.

Took the bike to Dandenong Bicycle Superstore who did a good job, and sorted a lot of bike maintenance/ tuning type issues that I’ve had a fiddle at but never got quite right, like the spoke tensioning and stuff like that. And my rear brakes, which needed attention. The general service on the bike from these guys well worth it.

Also I suspect the range on a full charge is down to about 33KM from the 44KM range it had when new, this is the expected wear on the battery, but I’m guessing I still have another year of use from the battery before it needs replacement. This matches the stated expected battery life so all OK there, especially as I can still get to work and back on a charge with some range left over.

upgraded brakes to Avid BB7

Well although functional the front YUS disc brakes on the older greenewheels ebikes were always a bit fiddly to adjust. After nearly a year of service mine stopped being able to provide grip at all. I suspect it is just the brake pads wearing out, but really it was hard for me to tell.. and I was itching to upgrade to something easier to keep adjusted anyway.

Although I can see greenewheels are selling replacement calipers on ebay for this brake, I decided to upgrade to a more adjustable, higher grade brake, as part of the slow gradual upgrades I am doing now the bike is established as my main way to commute.

I got myself an Avid BB7 from Bayswater Cycles online shop after determining my bike has 51mm I.S. type mounts (and that the BB7 has a suitable bracket for for this mount.

Despite it appearing easy it took me a few goes to get it adjusted right, but after I did this brake is working really well, and seems quite easy to adjust. Also due to being one of the main “brand name” disc brakes brake pads and parts should be easy to source for it from nearby bike shops.

Avid BB7 installed on greenewheels ebike

While I was removing the YUS rotor to install the Avid 160mm rotor I managed to strip one of the allen bolts.. I reall hassle as it was stuck. Maybe my set of Allen keys that came with the bike wore out, or maybe I had mixed up my Allen keys with some non-metric ones, I’m not sure.
Anyway before I made too much more of a mess of it I took it to work where some of the very helpful workshiop guys were able to cut a slot in with a dremel and remove it for me with a screwdriver.
Straight after that I went to Bunnings and got some decent Bondhus allen keys.. for under $12 a great investment.

greenewheels ebay store has increased product range

Well I’m nearly up to 3000K clocked up on my bike, and nothing to report except I need to get in the routine of bike maintenance more.. apart from that the greenewheels bike is holding up quite well, I’m riding it in the cold, wet and dark to and from work without any hassles.

Just took a look at the Greenewheels Ebay Store and noticed they have increased their product range again, to include a bunch of spare parts and add on parts, as well as some addon kits for ebike conversion. Nice to see a range of parts available to replace if needed.

Of particular interest is the 350W off road version of the greenewheels bike, would be excellent for those mountain tracks in places where the road rules don’t apply but you need a bit of extra grunt.