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Post by kris on Mar 26, 2023 12:33:44 GMT
I need to get a 48v 1kw hub motor for my recumbent bike as driving licence invalid as of tomorrow. Illegal? Soddem all they can't take the licence anyway. All the couriers have fast ebikes nothing happens. Its only got 20 inch wheel on the back so limited availability of suitable motors unless I get a custom made job. Fancy 30mph out of the bike that should sort it. I was thinking of buying an electric motor for my post office bike. I think recumbents are dangerous because they are wider than a bicycle but lower. What are the best cheapest options for 48v batteries?
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Post by kris on Mar 26, 2023 12:35:48 GMT
I need to get a 48v 1kw hub motor for my recumbent bike as driving licence invalid as of tomorrow. Illegal? Soddem all they can't take the licence anyway. All the couriers have fast ebikes nothing happens. Its only got 20 inch wheel on the back so limited availability of suitable motors unless I get a custom made job. Fancy 30mph out of the bike that should sort it. Fit a bafang bbs01b mid drive in the crank hole - is it still a bottom bracket on a 'bent? Plenty of poke and enough speed, can be tweaked from phone app (your motorola brick might not work though). Legal too. This is the option I’ve been thinking about. But 750w that can be turned down. I was thinking of self importing does anybody recommend a Chinese supplier on that forum you post on?
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Post by Aloysius on Mar 26, 2023 12:36:58 GMT
I need to get a 48v 1kw hub motor for my recumbent bike as driving licence invalid as of tomorrow. Illegal? Soddem all they can't take the licence anyway. All the couriers have fast ebikes nothing happens. Its only got 20 inch wheel on the back so limited availability of suitable motors unless I get a custom made job. Fancy 30mph out of the bike that should sort it. If you go for a hub motor a custom wheel would be very cool - stainless rim and spokes, etc and it would be very strong. But the frame is better suited to a crank motor than most conventional frames, however the hub motor is stealthier. And yes, in your case fuck the legalities. However you risk a fine and the bike being confiscated. Also if you have a tangle with a pedestrian your ass is grass.
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Post by Aloysius on Mar 26, 2023 12:41:24 GMT
Fit a bafang bbs01b mid drive in the crank hole - is it still a bottom bracket on a 'bent? Plenty of poke and enough speed, can be tweaked from phone app (your motorola brick might not work though). Legal too. This is the option I’ve been thinking about. But 750w that can be turned down. I was thinking of self importing does anybody recommend a Chinese supplier on that forum you post on? It can but I doubt insisting that you restricted it would cut much ice if it became an issue. The 750W motor is technically superior to the legal ones.
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Post by on Mar 26, 2023 13:04:51 GMT
I need to get a 48v 1kw hub motor for my recumbent bike as driving licence invalid as of tomorrow. Illegal? Soddem all they can't take the licence anyway. All the couriers have fast ebikes nothing happens. Its only got 20 inch wheel on the back so limited availability of suitable motors unless I get a custom made job. Fancy 30mph out of the bike that should sort it. Fit a bafang bbs01b mid drive in the crank hole - is it still a bottom bracket on a 'bent? Plenty of poke and enough speed, can be tweaked from phone app (your motorola brick might not work though). Legal too. I have looked at the Bafang 02. I have a 48v battery already unused so need a 48v motor. The bike has a "bottom bracket up the front so i think probably wires would not be long enough. Mid drive (fore-drive in this case) is an interesting option. Hub is more straightforward I think. Ideal would be a 16 inch front hub motor 48v.
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Post by on Mar 26, 2023 13:05:48 GMT
I need to get a 48v 1kw hub motor for my recumbent bike as driving licence invalid as of tomorrow. Illegal? Soddem all they can't take the licence anyway. All the couriers have fast ebikes nothing happens. Its only got 20 inch wheel on the back so limited availability of suitable motors unless I get a custom made job. Fancy 30mph out of the bike that should sort it. I was thinking of buying an electric motor for my post office bike. I think recumbents are dangerous because they are wider than a bicycle but lower. What are the best cheapest options for 48v batteries? Canondale Bent 2 is not a normal recumbent. Its high up and not especially wide. arse is not on the ground. Battery I bought is a normal 48v job about £200 this was for the floating electric beer drinking platform before the lovely LTO modules turned up. They (LTO) are a bit bulky for ebikes. Ebike battery Zose 48v 13ah
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Post by on Mar 28, 2023 14:05:37 GMT
It is actually quite an unusual arrangement because it has two chains. There is a "bottom bracket" up the front with a 34 tooth chain ring which drives a 4th sprocket on the normal 3 sprocket chainset below the seat then a second chain drives a 8 speed cassette. 24 speed gearing.
IF the front chain ring was changed to a bigger size appropriate for the Bafang mid drive all that would be needed would be a longer chain. Front end is adjusted by an eccentric arrangement.
So... Bafang BBS02 (cheaper than the 01 possibly because it is illegal) on the front with a 44 tooth chain ring would raise the gearing level potentially resulting in a VERY fast machine..
The thing could really fly. And eat chains. The bafangs have a sensor to cut the motor during gear change as the assumption is there is a single sprocket in the drive chainset so the sensor will be located on the derailleur cable.
Not so on this one so all sorts of things could happen.
crunch crunch
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Post by Jim on Mar 28, 2023 14:12:20 GMT
It is actually quite an unusual arrangement because it has two chains. There is a "bottom bracket" up the front with a 34 tooth chain ring which drives a 4th sprocket on the normal 3 sprocket chainset below the seat then a second chain drives a 8 speed cassette. 24 speed gearing. IF the front chain ring was changed to a bigger size appropriate for the Bafang mid drive all that would be needed would be a longer chain. Front end is adjusted by an eccentric arrangement. So... Bafang BBS02 (cheaper than the 01 possibly because it is illegal) on the front with a 44 tooth chain ring would raise the gearing level potentially resulting in a VERY fast machine.. The thing could really fly. And eat chains. The bafangs have a sensor to cut the motor during gear change as the assumption is there is a single sprocket in the drive chainset so the sensor will be located on the derailleur cable. Not so on this one so all sorts of things could happen. crunch crunch I think bafang do a 36t cog, mine came with a 46 but I swapped it for a 42. The awkward bit is the 5 point fitting, not 6, so normal chainrings don't fit.
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Post by on Mar 28, 2023 15:15:18 GMT
Yes and you can get adapters but they push the chain out of alignment.
I think this may be the right approach as the bike would do better with weight added to the front than the rear and the front wheel can be used for speed sensor. Its a 16 inch front and 20 inch rear so I don't know how well this would work. Looks like extension wires are available anyway. Maybe a nice little project.
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Post by on Mar 28, 2023 15:20:04 GMT
Silly but VERY comfortable. Making it move is worth doing. I would have put the forward chain on t'other side for better balance. I expect if I hang a powerful mid drive off the side up front some of the bearings might get upset. It seems the Rolls Royce option for this is a front wheel hub motor.
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Post by Aloysius on Mar 28, 2023 15:31:11 GMT
You can of course buy a chainring which comes with the central bit as well. The crucial bit of info is BCD which stands for Bolt Circle Diameter.
Looking at that pic it seems unlikely that it would be possible to fit a crank motor to the front drive arrangement; the frame is going to get in the way. Given the unusual layout it would be entirely less problematic to use a hub motor, thus you can keep the existing drivetrain without mods.
However, loads of space for the batt; a popular approach is to drill the frame and use rivnuts to enable the fixing.
Fucking hell I want one.
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Post by kris on Mar 28, 2023 15:36:16 GMT
That looks like a torture implement.
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Post by on Mar 28, 2023 15:50:05 GMT
Is actually really comfy. The seat is further back for me as I am 6ft2.214".
Its funny geometry yes but at the end of the day gliding around on a comfortable recliner seat is a heck of a lot more pleasant than an ordinary bicycle thing!
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Post by on Mar 28, 2023 16:02:26 GMT
You can of course buy a chainring which comes with the central bit as well. The crucial bit of info is BCD which stands for Bolt Circle Diameter. Looking at that pic it seems unlikely that it would be possible to fit a crank motor to the front drive arrangement; the frame is going to get in the way. Given the unusual layout it would be entirely less problematic to use a hub motor, thus you can keep the existing drivetrain without mods. However, loads of space for the batt; a popular approach is to drill the frame and use rivnuts to enable the fixing. Fucking hell I want one. Sorry Martin I missed this as my phone jumped a page. Thanks for the observation about the crank motor getting in the way of the frame. So its a hub motor then. For the battery I will use Stauff clamps. Big fan of Stauff clamps. Hydraulic pipe clamps made of nylon which come in lots of different sizes. tube diameter about 50mm. Stauff clamps are very adaptable and the nylon parts can be drilled easily. steel bits each side are not fixed. I use a stauff clamp for mounting the motor on the floating electric beer drinking platform and also for clamping the solar panels to the tubular handrails on the country estate boat. Like stauff clamps a lot. Stauff clamps = Good Shit.
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Post by Mr Stabby on Mar 28, 2023 16:07:48 GMT
Silly but VERY comfortable. Making it move is worth doing. I would have put the forward chain on t'other side for better balance. I expect if I hang a powerful mid drive off the side up front some of the bearings might get upset. It seems the Rolls Royce option for this is a front wheel hub motor. That sure reminds me of something...
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