DIY electric mountain bike
Discussion
https://metro.co.uk/2023/03/30/teenager-died-after...
If you fail to insure your electric scooter or bicycle, and it exceeds the speed of 25mph, you can pay the same charges as any other motor vehicle, with unlimited charges and 6-8 points on your licence.
If you fail to insure your electric scooter or bicycle, and it exceeds the speed of 25mph, you can pay the same charges as any other motor vehicle, with unlimited charges and 6-8 points on your licence.
bennno said:
https://metro.co.uk/2023/03/30/teenager-died-after...
If you fail to insure your electric scooter or bicycle, and it exceeds the speed of 25mph, you can pay the same charges as any other motor vehicle, with unlimited charges and 6-8 points on your licence.
That was an 8000w bike capable of 70mph with defective brakes, hardly the same thing as the OP is trying to build. As others have said, build a reasonable bike, ride it sensibly and you have almost zero chance of getting pulled.If you fail to insure your electric scooter or bicycle, and it exceeds the speed of 25mph, you can pay the same charges as any other motor vehicle, with unlimited charges and 6-8 points on your licence.
Richtea1970 said:
That was an 8000w bike capable of 70mph with defective brakes, hardly the same thing as the OP is trying to build. As others have said, build a reasonable bike, ride it sensibly and you have almost zero chance of getting pulled.
https://www.ebikemodshed.co.uk/products/72v-8000w-ebike-conversion-kit ARHarh said:
The answer is don't ride like a dick and chances are you will be fine. As in most things in life.
Not forgetting soft squishy flesh is no match for tarmac, metal death traps piloted by often distracted humans, trees, bushes, or even just raised Kerbs.I've fallen off my pedal bike sometimes when doing just 10mph to understand falling off at 40-50 mph = an very early, literally once in a lifetime opportunity to find out which religion has got it right with the idea of a higher celestial being!!!
Most eBike riden by good couriers are doing less sub 20mph unassisted passing police cars in traffic with zero consequences. I've seen probably 1 or 2 thinking they are on a motorbike, pretending to be motorbike on UK roads on 38mm tires, with tiny brakes, no protective clothing........the organ donation teams in the UK are oncall 24/7, and ready to go.
Part of the thinking behind the 25kmh/15.5mph EU speed restriction on standard pedelecs is that the things are expected to share bike paths with non-assisted bikes.
Remove the restrictor and:
-the speed differential becomes too big between e and non-e bikes on shared paths
-it gets pretty terrifying for pedestrians on split pavements, like so many are here in DE.
There’s basically no difference between a standard Bosch pedelec and a factory de restricted ‘speed pedelec’. It’ll have the same frame, fork, motor, battery, brakes. The lights will be upgraded to moped spec and it’ll have a number plate, but that’s for the insurance, not registered to the owner.
Speed pedelecs aren’t allowed to use bike paths anywhere anytime and moped-spec helmets are compulsory.
They’re pretty awesome things. They whip up to 50kmh effortlessly on the flat.
Remove the restrictor and:
-the speed differential becomes too big between e and non-e bikes on shared paths
-it gets pretty terrifying for pedestrians on split pavements, like so many are here in DE.
There’s basically no difference between a standard Bosch pedelec and a factory de restricted ‘speed pedelec’. It’ll have the same frame, fork, motor, battery, brakes. The lights will be upgraded to moped spec and it’ll have a number plate, but that’s for the insurance, not registered to the owner.
Speed pedelecs aren’t allowed to use bike paths anywhere anytime and moped-spec helmets are compulsory.
They’re pretty awesome things. They whip up to 50kmh effortlessly on the flat.
tommobot said:
I've gone and purchased the 350w rear hub kit from yosepower..
Hopefully, will be here early next week and can get along with fitting. Was about £370, for a 500w kit was looking about double so I'll start with it for now...
You'd better get watching some Youtube videos on how to fit it then Hopefully, will be here early next week and can get along with fitting. Was about £370, for a 500w kit was looking about double so I'll start with it for now...
I've got the kit, semi fitted and remarkably impressed.
Taken out for a spin down the road and it flew upto just under 18mph on the throttle only...
This was gently uphill and with a slightly binding brake.
Issues that I haven't envisaged:
1) My old hardtail has the gears and brake levers integrated... Didn't want new gear selectors, but did want the brake caliper that came with the kits
2) getting the pedal crank arm off to fit the pedal assist sensor.. the kit came with a tool that is made of cheese and ruined the threads of both the crank arm and tool .. no problems, I'd angle grind off the pedal arm and take off the pedal arm from another bike using a replacement tool. Nope, exactly the same
... Threads chewed up..
Anyway, nothing against the kit... Just my inability with bikes ... Cars I can do no problems, working on bikes just always go wrong for me
Need to get the pedal assist working then I'll be over the moon with it!
Taken out for a spin down the road and it flew upto just under 18mph on the throttle only...
This was gently uphill and with a slightly binding brake.
Issues that I haven't envisaged:
1) My old hardtail has the gears and brake levers integrated... Didn't want new gear selectors, but did want the brake caliper that came with the kits
2) getting the pedal crank arm off to fit the pedal assist sensor.. the kit came with a tool that is made of cheese and ruined the threads of both the crank arm and tool .. no problems, I'd angle grind off the pedal arm and take off the pedal arm from another bike using a replacement tool. Nope, exactly the same
... Threads chewed up..Anyway, nothing against the kit... Just my inability with bikes ... Cars I can do no problems, working on bikes just always go wrong for me
Need to get the pedal assist working then I'll be over the moon with it!
tommobot said:
I've got the kit, semi fitted and remarkably impressed.
Taken out for a spin down the road and it flew upto just under 18mph on the throttle only...
This was gently uphill and with a slightly binding brake.
Issues that I haven't envisaged:
1) My old hardtail has the gears and brake levers integrated... Didn't want new gear selectors, but did want the brake caliper that came with the kits
2) getting the pedal crank arm off to fit the pedal assist sensor.. the kit came with a tool that is made of cheese and ruined the threads of both the crank arm and tool .. no problems, I'd angle grind off the pedal arm and take off the pedal arm from another bike using a replacement tool. Nope, exactly the same... Threads chewed up..
Anyway, nothing against the kit... Just my inability with bikes ... Cars I can do no problems, working on bikes just always go wrong for me
Need to get the pedal assist working then I'll be over the moon with it!
It's always worth buying a quality crank puller. I got mine from Park Tool. It is worth watching videos from RJ The Bike Guy on YouTube for how to do this correctly. Park Tool also have great videos. Both are on YouTube.Taken out for a spin down the road and it flew upto just under 18mph on the throttle only...
This was gently uphill and with a slightly binding brake.
Issues that I haven't envisaged:
1) My old hardtail has the gears and brake levers integrated... Didn't want new gear selectors, but did want the brake caliper that came with the kits
2) getting the pedal crank arm off to fit the pedal assist sensor.. the kit came with a tool that is made of cheese and ruined the threads of both the crank arm and tool .. no problems, I'd angle grind off the pedal arm and take off the pedal arm from another bike using a replacement tool. Nope, exactly the same
... Threads chewed up..Anyway, nothing against the kit... Just my inability with bikes ... Cars I can do no problems, working on bikes just always go wrong for me
Need to get the pedal assist working then I'll be over the moon with it!
As for the brake sensors, the easiest way would be to remove your left intigrated shifter/brake lever and front derailleur. Then fit the left brake lever and sensor from your kit.
Leave the chain on the middle ring and remember to always use both levers when braking (or at least the left one).
If you must have a front derailleur you could always fit a Shimano Revoshift shifter.
Also, Inline brake sensors are available but you'd need to shorten your brake cables.
Alternatively use pedal assist only and remove the throttle, brake sensors are not needed if you have no throttle. The reasoning is the throttle can short out and remain in the fully open position therefore brake cut-outs are needed for this eventuality. This situation does not happen with pedal assist apparently.
Or alternatively buy reed switch brake sensors
https://www.ebay.co.uk/itm/364093868910?hash=item5...
These are what I use, they are also useful for regen braking, which is useful on the steep hills I often ride. I also have a switch plumbed in so i can switch on regen braking. Great for long slopes when you just need to knock off a bit of speed without using the brakes.
https://www.ebay.co.uk/itm/364093868910?hash=item5...
These are what I use, they are also useful for regen braking, which is useful on the steep hills I often ride. I also have a switch plumbed in so i can switch on regen braking. Great for long slopes when you just need to knock off a bit of speed without using the brakes.
ARHarh said:
The answer is don't ride like a dick and chances are you will be fine. As in most things in life.
You could still be in trouble if you have an incident which isn't your fault.Pedestrians, dogs and dog owners can be very stupid.
Someone steps into your path and suddenly blame is coming your way.
OutInTheShed said:
ARHarh said:
The answer is don't ride like a dick and chances are you will be fine. As in most things in life.
You could still be in trouble if you have an incident which isn't your fault.Pedestrians, dogs and dog owners can be very stupid.
Someone steps into your path and suddenly blame is coming your way.
.
My wife has a Bird Aeris 145 full suspension mtb. Its a small size frame as she is vertically challenged!
Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
hab1966 said:
My wife has a Bird Aeris 145 full suspension mtb. Its a small size frame as she is vertically challenged!
Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
Yes the battery might be an issue, but you should be able to get one that fits. It just may not be the biggest capacity.Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
Mid drive motor conversion kits are pretty simple to fit if you are used to bike fiddling. I got mine from Whoosh bikes. They are not the cheapest but UK based and offer good support if you need it.
ETA you will need the special tools/big hammer required to get the cranks off and remove the BB, so add those to the shopping list if you don't have them
already.
Edited by dontlookdown on Tuesday 11th April 09:01
Got the pedal assist working, angle grinded off the pedal and angle gridned off the crank off any even older bike. Problem solved.
Seems to be able to do a pretty solid 20mph everywhere which is more than I expected.
This is without even charging the battery, this is still with the charge from whatever the battery came with when delivered.
Maybe / hopefully a bit more power comes forth with a fresh full charge but we'll see....
Seems to be able to do a pretty solid 20mph everywhere which is more than I expected.
This is without even charging the battery, this is still with the charge from whatever the battery came with when delivered.
Maybe / hopefully a bit more power comes forth with a fresh full charge but we'll see....
hab1966 said:
My wife has a Bird Aeris 145 full suspension mtb. Its a small size frame as she is vertically challenged!
Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
You don't say if you would prefer hub drive or mid-drive.Due to ill health, she can no longer ride it over the terrain or distance she used to be abe to.
She longs to get back on a bike but the only way we think this will work is if she has assistance using an Ebike.
Having been to the local shop and identifying a rather nice bike at £5k i thought id look around and seek cheaper options!
What 'equipment' would i need to look at to attach a motor to the frame? I believe the bike has a 73mm threaded bottom bracket but i believe the issue will be mounting the battery on the bottle mounts given the frame size?
The hub drive would be easier and the equipment needed (apart from general tools) would be a crank puller and possibly a bottom bracket removal tool.
There are options for battery fitment depending on the frame of the bike.
This one has the battery squeezed into the frame triangle, you would need a cardboard cut-out of the battery dimensions you are considering to see if that would work.
This one has the battery slung from the front of the downtube.
Woosh are now providing this option with their kits, could be an option depending on how much the rear wheel moves under suspension compression.
tommobot said:
Got the pedal assist working, angle grinded off the pedal and angle gridned off the crank off any even older bike. Problem solved.
Seems to be able to do a pretty solid 20mph everywhere which is more than I expected.
This is without even charging the battery, this is still with the charge from whatever the battery came with when delivered.
Maybe / hopefully a bit more power comes forth with a fresh full charge but we'll see....
Well done mate, so new crank set then?Seems to be able to do a pretty solid 20mph everywhere which is more than I expected.
This is without even charging the battery, this is still with the charge from whatever the battery came with when delivered.
Maybe / hopefully a bit more power comes forth with a fresh full charge but we'll see....
Did you get the brake sensors fitted?
Nope, just angle grinded existing pedal arm and left the central crank element in place...
On spare / older bike completely grinded off the pedal arm and crank and just smashed out remains of crank from the pedal arm in a vice..
Then pedal arm back on the new ebike..
Got busy with the angle grinder and just grinded off the brake levels and remained the gear selectors in place, bit bodgey but everything filed down nice and smooth.
Ultimately, form over function with the bike... Not at all fussed how it looks as long as it gets me to work and back....
On spare / older bike completely grinded off the pedal arm and crank and just smashed out remains of crank from the pedal arm in a vice..
Then pedal arm back on the new ebike..
Got busy with the angle grinder and just grinded off the brake levels and remained the gear selectors in place, bit bodgey but everything filed down nice and smooth.
Ultimately, form over function with the bike... Not at all fussed how it looks as long as it gets me to work and back....
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