Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

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RichiePA   10 W

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Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by RichiePA » Sep 13 2018 12:00pm

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Hi All,

For sale is my much loved electric bike which I built myself while studying to be a Mechanical Engineer 7 years ago. This bike is a beast and with a good battery puts out over 3kW with its 72V 45Amp controller coupled with a crystalite HT hub motor. With that amount of power it's not exactly road legal, consider yourself warned. :wink:

UNFORTUNATELY THE BATTERY IS ON ITS LAST LEGS AND NEEDS REPLACING BEFORE THE BIKE CAN BE REGULARLY RIDDEN. I will only sell the bike to someone on the understanding that the bike requires a new battery to give the bike a new lease of life. As such I am willing to move on price to find the bike the right new owner who knows enough about electronics to make their own replacement battery and charging solution. It currently runs a 20s3p (72V nominal 15Amphr) LiPo pack that I built from Jozzer's reject LiPo packs way back when. Unfortunately if you don't posses the required know-how to get this bike back to its best then I probably wont sell it to you. Please only contact me if you are a serious buyer with the electrical know-how and mechanical-sympathy to take on a project bike like this, if you don't know how to look after this bike you could destroy it very quickly and possibly burn down your house in the process :cry:
The bike has barely done any mileage in the last few years so everything could do with a good going over before you start using it. Take a good look at the pictures the paint is a bit crazed and rubbed away in places and the chain just loves to jump off the Chainring :roll:
With that said it is one hell of a machine :evil: and evry where I used to go it would turn heads :mrgreen:

It's really upsetting me, the thought of not owning it anymore. But it upsets me slightly more seeing it collecting dust. I'm keen to find the right person to take this bike off my hands and give it the new lease of life it deserves. If that's you? Drop me a PM and we can discuss. If you don't have the electrical/mechanical know-how then I'm sorry but this isn't the bike for you. Also it is collection only.

Some old info is available in my build thread, see link in my signature.
Thanks for looking.
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Giant DH Team, Crystalyte HT35 rear hub, Crystalyte 72V 45Amp controller,
Build thread here

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by 999zip999 » Sep 14 2018 5:19pm

Nice would LOVE it if in the USA.

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by 999zip999 » Sep 14 2018 6:54pm

What frame is that ?

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RichiePA   10 W

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by RichiePA » Sep 16 2018 3:16am

It's a 2003 Giant DH team, I think it's the medium size. I selected this bike specifically because of the way it's shock is packaged neatly just behind the bottom bracket. Leaving a nice big frame triangle to fill with batteries. Unlike a lot of other downhill bikes that use the frame space for the rear shock.
It's a heavily built bike for sure but I think that's good thing considering the extra forces it has to deal with from the weight of the batteries and the torque of the motor. I love the geometry of this bike and the way it rides. It's very agile especially considering the weight being around 30kg. It's always just dealt with whatever I've pointed it at and Its never spat me off.
Giant DH Team, Crystalyte HT35 rear hub, Crystalyte 72V 45Amp controller,
Build thread here

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by markz » Sep 19 2018 7:33pm

I dig the looks of that ebike.

viewtopic.php?f=3&t=27889#p417880
Crystalyte HT35 which Crystalyte marketed as High Torque, in reality its the same motor the other HS, its just that the HT has a lower KV or RPM/V (which is a higher tooth count) on the HT.

The HS is the exact same motor, just that is has a higher KV or RPM/V (which is a lower tooth count) on the HS.

It is Crystalyte's marketing fudgery.
More info - viewtopic.php?f=2&t=96045&p=1407496&hil ... n#p1407496
In depth - viewtopic.php?f=2&t=64907&p=985052&hilit=justin#p984783

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by Jimboyr6 » Sep 27 2018 8:09am

Hi
Can u give me battery space measurements
Thanks
Stealth bomber owner 138 livin the dream

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RichiePA   10 W

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by RichiePA » Sep 28 2018 10:18am

Hi Jimboyr6,
Battery dimensions drawing.JPG
Battery 3D model.JPG
If I end up keeping the bike I'll probably make a new battery pack out of 18650 cells. I could easily get 120 of them in to give a 20s (72V) 6 parallel pack pictured below. I'm sure If I tried I could squeeze 2 banks in next to each other for 240cells (20s x 12p) but that would be a squeeze (width wise) and it would be heavy so I'd probably stick with the 120cells option.
18650 battery.JPG
Giant DH Team, Crystalyte HT35 rear hub, Crystalyte 72V 45Amp controller,
Build thread here

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by Jimboyr6 » Oct 01 2018 2:12pm

Thanks for info
Im getting quotes for batterys for about £700+ with the work and upgrades to the bike that it needs i have to get it for less than £1000.
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RichiePA   10 W

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by RichiePA » Oct 06 2018 10:39am

Hey Jimboyr6 sorry for the late reply its been a busy week,
I got a quote from Batterybro for 120 cells to do a new battery pack a little while back. It was around $320 for the 120 cells plus another $150 for airfreight not sure what they would charge for overland/sea freight. The £700 was that for a custom built pack?

I would move on price a bit for the right buyer because I do want to pass it on to someone who will enjoy using it. Its a pretty unique bit of kit and so much fun to ride, which makes it a real wrench for me to let it go. So I'm not going to be beaten down on price too much. The way I see it, it has a very limited market so it might take a while to find a new owner but I'm happy to wait for the right buyer. Meanwhile I'll just have to put up with owning the meanest ebike in town 8)
Giant DH Team, Crystalyte HT35 rear hub, Crystalyte 72V 45Amp controller,
Build thread here

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RichiePA   10 W

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,200

Post by RichiePA » Nov 08 2018 2:19pm

Since it's all gone a bit quiet I'm cranking down the price! Still really torn as to whether or not to give the bike a spruce-up myself and fit a new battery pack. I know I'd get a lot more interest and could ask more for it. But I want whoever I sell it on to to buy it as a project, so that they can learn about the bike buy doing their own work on it rather than sell it to someone who doesn't have a clue.
Giant DH Team, Crystalyte HT35 rear hub, Crystalyte 72V 45Amp controller,
Build thread here

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Re: Giant DH 3kW eBike (needs new battery) SE England, Offers in the region of £1,500

Post by sacko » Nov 09 2018 6:16am

Also in the South East (Kent).

I actually have a 24s 10ah Lipo pack (100v) that would be perfect for this. Cells always used with BMS, and rarely used! I could do a deal with the buyer of this. (Want no less than £250).

Alternatively I can build 18650 packs, if that helps anyone out.

GlWTS :thumb:

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