Hello all,
I just thought I would share my creation on the board to see what people think and to get any advice on how I can make it any better.
It started out as a second hand bike from gumtree costing £190 pretty good condition specialized hardrock
Added a GNG motor View attachment 2
View attachment 1
and a 48v lithium ion 15ah batter on the battery rack at the back. As the pannier rack came with no instructions I completely had to use my own ingenuity to fit it and this proved really bad. it was very back heavy and didn't like any bumps like going over curbs and rough terrain.
I went over a large hump on the grass one day and the back wheel hit really hard and the force broke the pannier rack at the back and the side bars that screw in went straight into my cassette and brakes ! !
Luckily i was fine and nothing else broke apart from the rack bolts which are still broken inside my bike rack holes. but anyway since then i used the exact same locking mechanism and pannier rack except i fitted it in the middle of the bike on top of the frame. the pannier rack side arms which normally screw in the back have been jubilee clip tied together around the base and obviously in other areas. But it has worked out amazing and i wouldn't really want to but the battery anywhere else. I don't even notice it now on bumps and to be honest i think its somehow nippier now.
the only other problem i have had so far is my Gear shifter on the right broke somehow and fell apart as i was using it. That cost me 55 quid to fix because i had to buy a set of shifters as i was impatient to wait for single to appear second hand. I also fitted a lemon hobby watt meter that sits permanently connected and goes of when I remove the key from the battery i would like to wire a 2nd battery to keep it on all the time but its a bit complicated for me in this setup right now. I also found an old instrument bag and cable tied it to make it look neater. I put the controller inside a controller box that was being sold by the same ebay guy I got the motor from.
So far my total cost has been
Bike= £190 2nd hand
Motor GNG KIT =£300 from a great ebayer in hayes £15 for controller box = £315
Battery = £357 + £27 customs = £384
wattmeter= £25
Cat eye wireless = 30
Grand total is £ 944 Its dam expensive for a bike i agree but in my opinion its great fun and hopefully it will last a while.
Its very very quick in 1st gear to start and top speed so far with pedaling is 37mph slight downhill
On a straight top speed without pedalling 31mph
usual speed is about 24mph
Its a:
1. 48v 15ah battery from an Ebay seller whos in China and still sells Lithium Ion batteries if you type 48v lithium ion batteries !
2. Its a 60v gNG chain drive kit which has a low cut off of 40v so im fine apparently , anyone have any advice on this I believe the controller is designed for 60v but im running it 48v is this fine ?
3. When i charge my 48v battery it goes to 54v roughly is this normal and if so does this mean that by me running a 60v controller im actually now able to use more power than if i had a 48v controller because the 48v controller wouldnt allow 54v would it ?
IM totally a newbie with electronics and i would like some advice on this voltage situation with my 60v controller please !
Also how much range can I expect from the 48v 15ah with my gng chain drive ? i know it varies but roughly.
Any other advice as to what i should do to make it better ?
thanks for reading happy riding
Starway
I just thought I would share my creation on the board to see what people think and to get any advice on how I can make it any better.
It started out as a second hand bike from gumtree costing £190 pretty good condition specialized hardrock
Added a GNG motor View attachment 2
View attachment 1
and a 48v lithium ion 15ah batter on the battery rack at the back. As the pannier rack came with no instructions I completely had to use my own ingenuity to fit it and this proved really bad. it was very back heavy and didn't like any bumps like going over curbs and rough terrain.
I went over a large hump on the grass one day and the back wheel hit really hard and the force broke the pannier rack at the back and the side bars that screw in went straight into my cassette and brakes ! !
Luckily i was fine and nothing else broke apart from the rack bolts which are still broken inside my bike rack holes. but anyway since then i used the exact same locking mechanism and pannier rack except i fitted it in the middle of the bike on top of the frame. the pannier rack side arms which normally screw in the back have been jubilee clip tied together around the base and obviously in other areas. But it has worked out amazing and i wouldn't really want to but the battery anywhere else. I don't even notice it now on bumps and to be honest i think its somehow nippier now.
the only other problem i have had so far is my Gear shifter on the right broke somehow and fell apart as i was using it. That cost me 55 quid to fix because i had to buy a set of shifters as i was impatient to wait for single to appear second hand. I also fitted a lemon hobby watt meter that sits permanently connected and goes of when I remove the key from the battery i would like to wire a 2nd battery to keep it on all the time but its a bit complicated for me in this setup right now. I also found an old instrument bag and cable tied it to make it look neater. I put the controller inside a controller box that was being sold by the same ebay guy I got the motor from.
So far my total cost has been
Bike= £190 2nd hand
Motor GNG KIT =£300 from a great ebayer in hayes £15 for controller box = £315
Battery = £357 + £27 customs = £384
wattmeter= £25
Cat eye wireless = 30
Grand total is £ 944 Its dam expensive for a bike i agree but in my opinion its great fun and hopefully it will last a while.
Its very very quick in 1st gear to start and top speed so far with pedaling is 37mph slight downhill
On a straight top speed without pedalling 31mph
usual speed is about 24mph
Its a:
1. 48v 15ah battery from an Ebay seller whos in China and still sells Lithium Ion batteries if you type 48v lithium ion batteries !
2. Its a 60v gNG chain drive kit which has a low cut off of 40v so im fine apparently , anyone have any advice on this I believe the controller is designed for 60v but im running it 48v is this fine ?
3. When i charge my 48v battery it goes to 54v roughly is this normal and if so does this mean that by me running a 60v controller im actually now able to use more power than if i had a 48v controller because the 48v controller wouldnt allow 54v would it ?
IM totally a newbie with electronics and i would like some advice on this voltage situation with my 60v controller please !
Also how much range can I expect from the 48v 15ah with my gng chain drive ? i know it varies but roughly.
Any other advice as to what i should do to make it better ?
thanks for reading happy riding
Starway
