The more I read the less I know

[Anthonyexmouth]

Hi, suffering with a temp back issue and want to use that as an excuse to convert my 2004 rock hopper (hydraulic discs) . Keep fliting between CD and rear hub. Now my main use will be trips to my local city. It's not too hilly, more gentle roller coaster and about 22m round trip. My other planned use is to tow a small trailer with my diving kit on a fairly flat cycle path to a local beach. That trip is @6 miles each way. At the moment I'm leaning towards 1000w rear hub from pedelease with the 20ah battery. Any help/options would be appreciated

 

[Woosh]

for towing, you would be better off with a rear hub BPM kit.

http://wooshbikes.co.uk/?hubkits

 

[Deleted member 4366]

I think it was Pedalease that had really bad reviews, so check that out first. Those 1000w direct drive motors are too fast for towing anyway. I don't mean that they're too fast, it's that they're too inefficient at low speed, so overheating is a real risk.

 

[Anthonyexmouth]

for towing, you would be better off with a rear hub BPM kit.

http://wooshbikes.co.uk/?hubkits

I did see that the BPM was a better choice for towing but never worked out what the down side was. Apart from the additional £100

 

[Anthonyexmouth]

I think it was Pedalease that had really bad reviews, so check that out first. Those 1000w direct drive motors are too fast for towing anyway. I don't mean that they're too fast, it's that they're too inefficient at low speed, so overheating is a real risk.

I did read some bad reviews but they seemed to be quite old and only found a few recent ones but they seemed to be glowing

 

[Woosh]

I did see that the BPM was a better choice for towing but never worked out what the down side was. Apart from the additional £100

yes, sorry about the price. It costs exactly twice the price of the MXUS XF08C but it does have a big torque at low speed. The alternative is the SWX02, a little cheaper and still has about 90% of the torque of the BPM.

 

[Anthonyexmouth]

yes, sorry about the price. It costs exactly twice the price of the MXUS XF08C but it does have a big torque at low speed. The alternative is the SWX02, a little cheaper and still has about 90% of the torque of the BPM.

Not that worried about speed so torque would be more useful to me. What kinda speed would the BPM rear wheel kit do?
What would a complete bpm kit with battery cost me? Would I need to buy a cassette?

 

[Woosh]

What kinda speed would the BPM rear wheel kit do?

the legal assist speed is 15.5mph for all EAPCs and kits. The noload speed for all the motors we do is about 22mph-23mph. That is, the speed you get when the motor is not restricted and lifted from the ground.
The XF08C has a cassette fitting, all the other motors have freewheel fitting, all are disc brake compatible.
If your bike has an 8-speed cassette, then we can supply an 8-speed freewheel to replace it. If it has 9-speed cassette, then go for the XF08C kit.
You will also need at least one hydraulic brake sensor, you can buy it ready made or make your own with a reed switch and a magnet.

What would a complete bpm kit with battery cost me? Would I need to buy a cassette?

If you have 8-speed, the BPM kit with 17AH battery costs £629
http://wooshbikes.co.uk/cart/#/product/uid-171-hubkit-swx02-17ah/swx02-26-inch-rear-hub-kit-with-17ah-battery

Would I need to buy a cassette?

No, we'll install an 8-speed freewheel for you.

If you have the 9-speed cassette, then go for the £499 XF08C with 13AH battery.

http://wooshbikes.co.uk/cart/#/product/uid-121-xf08c-13ah/xf08-cst-26-inch-rear-hub-kit-with-13ah-battery

The BPM needs a bigger battery to allow it to draw more current. The XF08C is OK with 13AH.
You can reuse the existing cassette with the XF08C.

 

[Nealh]

Pedalease appear to use a home address and only email contact which some appear to get no reply so be wary.
The 1000w D/D hub is a low torque/ gearless drive (approx. 6kg). They are wound for higher speed (390 - 470 rpm), ideal for faster constant speed riding. For trailer towing a higher torque slower wound drive would be more suitable.

 

[Anthonyexmouth]

Pedalease appear to use a home address and only email contact which some appear to get no reply so be wary.
The 1000w D/D hub is a low torque/ gearless drive (approx. 6kg). They are wound for higher speed (390 - 470 rpm), ideal for faster constant speed riding. For trailer towing a higher torque slower wound drive would be more suitable.

Yeah, the BPM kit looks like it would be ideal for my needs. I take it that's more efficient than a gearless one?

 

[Nealh]

Geared hubs give good efficiency and torque at low speed if the right rpm motors are selected, generally this is in the 201 - 270 rpm range. The difference between the range is about 4 - 5 mph.
The BPM is 201rpm on the road, my one at 36v does about 19/20mph and has very low speed high torque and quick acceleration. As with my 201rpm Q128C hub both will outpace most cars ( up to about 5 yard/20ft or so ) from a standstill if I use the thumb throttle with my peddling. Ideal for my riding as I like to commandeer the road at junctions and be the one in control. Alternately use a 48v battery for mid 20's mph. Bpm needs a 15 or 17.5ah battery to deliver the power.

 

[Anthonyexmouth]

the legal assist speed is 15.5mph for all EAPCs and kits. The noload speed for all the motors we do is about 22mph-23mph. That is, the speed you get when the motor is not restricted and lifted from the ground.
The XF08C has a cassette fitting, all the other motors have freewheel fitting, all are disc brake compatible.
If your bike has an 8-speed cassette, then we can supply an 8-speed freewheel to replace it. If it has 9-speed cassette, then go for the XF08C kit.
You will also need at least one hydraulic brake sensor, you can buy it ready made or make your own with a reed switch and a magnet.



If you have 8-speed, the BPM kit with 17AH battery costs £629
http://wooshbikes.co.uk/cart/#/product/uid-171-hubkit-swx02-17ah/swx02-26-inch-rear-hub-kit-with-17ah-battery


No, we'll install an 8-speed freewheel for you.

If you have the 9-speed cassette, then go for the £499 XF08C with 13AH battery.

http://wooshbikes.co.uk/cart/#/product/uid-121-xf08c-13ah/xf08-cst-26-inch-rear-hub-kit-with-13ah-battery

The BPM needs a bigger battery to allow it to draw more current. The XF08C is OK with 13AH.
You can reuse the existing cassette with the XF08C.

I'm not married to my 9speed so don't mind changing. Can you confirm the BPM is £629, your site says £649. I'm on a tablet and it's not scaling very well so I might be missing something. Also is it the 500w bpm2 or the older one?

 

[Anthonyexmouth]

The BPM is 201rpm on the road, my one at 36v does about 19/20mph and has very low speed high torque and quick acceleration, as with my 201rpm Q128C hub both will outpace most cars from a standstill if I use the thumb throttle with my peddling. Alternately use a 48v battery for mid 20's mph. Bpm needs a 15 or 17.5ah battery to deliver the power.

Mid 20s would be all I would want anyway. Wouldn't wanna draw too much attention to myself. Is that speed on throttle alone? Could you go faster if you pedal?
What kinda range do you get?

 

[Anthonyexmouth]

Geared hubs give good efficiency and torque at low speed if the right rpm motors are selected, generally this is in the 201 - 270 rpm range. The difference between the range is about 4 - 5 mph.
The BPM is 201rpm on the road, my one at 36v does about 19/20mph and has very low speed high torque and quick acceleration. As with my 201rpm Q128C hub both will outpace most cars ( up to about 5 yard/20ft or so ) from a standstill if I use the thumb throttle with my peddling. Ideal for my riding as I like to commandeer the road at junctions and be the one in control. Alternately use a 48v battery for mid 20's mph. Bpm needs a 15 or 17.5ah battery to deliver the power.

So it's best to get a 36v motor and run at 48v?

 

[Woosh]

I'm not married to my 9speed so don't mind changing. Can you confirm the BPM is £629, your site says £649. I'm on a tablet and it's not scaling very well so I might be missing something. Also is it the 500w bpm2 or the older one?

You need to check your bike, the derailleur and shifter may be for 9-speed instead of 8.

Can you confirm the BPM is £629, your site says £649. I'm on a tablet and it's not scaling very well so I might be missing something.

Sorry, £649 with 17AH or £599 with 15AH. We have both.

Also is it the 500w bpm2 or the older one?

It's 350W.

 

[Nealh]

Mid 20s would be all I would want anyway. Wouldn't wanna draw too much attention to myself. Is that speed on throttle alone? Could you go faster if you pedal?
What kinda range do you get?

Mine at 36v is max 17.5mph on throttle, though it gives max amps from standstill hence the good acceleration. I pedal at the same if getting ahead of the queue as I can continue to 19 mph.

 

[Nealh]

So it's best to get a 36v motor and run at 48v?

Generally yes, most 36v controllers will handle 48v as thye have 50v capacitors, if the controller does fry just replace it with a 48v one of the same make.

 

[Deleted member 4366]

It's best to use a 48v controller with a 48v battery to get the right low voltage control and to show the correct battery charge status as well as because it won't blow.

 

[Anthonyexmouth]

So, 36v motor with 48v controller and battery.

 

[Woosh]

if you can wait, the 48V kits and batteries arrive in October.