EZee Kit Micro-Review

tillson

Esteemed Pedelecer
May 29, 2008
5,252
3,197
This micro review is based on about 1 hour of riding and about 17 miles.

A friend of mine has recently fitted a front wheel EZee kit to his bike (Giant Escape R8). He had previously owned a Panasonic crank driven Giant Lafree, sold that about 4 years ago, bought the Escape R8 and used that un-assisted until recently fitting the EZee kit. He only has good things to say about the conversion. Like me, he had only ever known or owned a crank driven bike, so I was curious to have a go and see how it compares.

My experience of electric bikes is limited to about 11000 miles / 4 years of Kalkhoff Pro Connect ownership and a test ride on gahstly Giant Twist 2 at the time of buying the Pro Connect.

The test ride on the hub motored Giant Twist 2 put me off hub motors. The experience was how I would imagine it to be if one tried to traverse a lake of treacle on a pedalo whilst being pelted with shards of broken glass on a day when it was raining Tabasco sauce. Hateful.

The EZee powered Giant arrived last night at about 7:30 and we set off along a nearby flat cycle route. The kit has a 36v 10Ah battery mounted on a rear rack, a rotary power control and a thing called a Cycle-Analyst. The Cycle-Analyst (CA) was quite impressive giving speed, power consumption, max Amps, min Volts, speed and a few other functions too.

The first thing that struck me was how powerful and smooth the motor was. On half power, the thing pulled away very quickly until it reached max assist speed, which seemed to be about 19 mph. It was like being catapulted from a standing start. Cruising at 19 MPH on the flat, the CA said the motor was using 10Watts.

The handling was nimble and I didn't notice the battery on the rack affecting the ride in any way.

We came to a rather long and steep hill, I don't know the gradient, but it's a, "good un" as they say in Derbyshire. This was what I was waiting for. This would be where my friend on my Pro Connect would pass me because crank drive are better at hill climbing and I would be panting my way to the top on the inferior hub motor machine. I whacked the power up to max and prepared for the onslaught to the top. The thing just accelerated up the hill with me struggling to keep pace on the pedals. The CA said I was doing 18 MPH and the motor drawing 620 Watts! It left the Pro Connect in its wake.

The remainder of the ride followed a similar pattern. The EZee was very powerful, very fast and a very good hill climber. It was also smooth and quiet. The components had a feel of robustness and quality too. I was impressed.

I can't say if it was better or worse than my Pro Connect. It was different and what you want from the bike will determine which is best. You definitely work harder in a more natural way on the Pro Connect and that is what I want, so I would stick with it. But if you want a bike that will give you a good, "shove" up hill with a bit of quality thrown in, this kit is worth considering. It's powerful and fast.

This was only a short ride, so don't read too much into it. These are more or less first impressions.
 

amigafan2003

Esteemed Pedelecer
Jul 12, 2011
1,389
139
620watts and 19mph?

Am I correct to assume the bike was MSVA'd, registered, insured, taxed and you were wearing an approved motorbike helmet on your test ride?

;)

Sounds like a nice kit - I very nearly plumped for one when I was researching my first ebike.
 
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tillson

Esteemed Pedelecer
May 29, 2008
5,252
3,197
:eek:
620watts and 19mph?

Am I correct to assume the bike was MSVA'd, registered, insured, taxed and you were wearing an approved motorbike helmet on your test ride?

;)

Sounds like a nice kit - I very nearly plumped for one when I was researching my first ebike.
I knew you would pick up on that :D

It is a nice kit. I can't explain what the Cycle-Analyst thingy was telling me, but on the face of it, the bike had more than 250 Watts and 15 mph assist.

Am I correct in thinking that 250 Watts is a nominal continuous figure and a peak power of greater than 250 Watts for short bursts is acceptable?
 

flecc

Member
Oct 25, 2006
53,361
30,710
They all well exceed the 250 watt continuous capability, the Pro Connect at least 400 watts. It's how the power is interpreted and some fudges in the official measuring.

eZee are the most powerful standard legal e-bikes on our market, and the Giant Twist 2 comparison is very much two ends of the power scale. That Giant had much lower power to start with and incorporated regeneration, as a result having considerable motor drag, something that they later dropped. The end result being that it's usable power was only around half that of the eZee.
 

KirstinS

Esteemed Pedelecer
Apr 5, 2011
3,224
899
Brighton
My understanding is that the ezee kits can be derestricted - perhaps yours is ?

This is most helpful review - Ezee kit is my probrably going to be my kit of choice for a hardtail build and this helps cement my view that its the best motor for the job (can't be bothered to cycle up the Downs anymore - just want to bomb down the other side!)

Not sure what differnce between their kits are . Website says Mark2 kits are coming soon.

Might John be able to give us a little more info ? And possible prices ?
 

flecc

Member
Oct 25, 2006
53,361
30,710
Both my eZee based bikes have been the same, they are supplied restricted to 15 mph via the wiring and have no override switch. By disconnecting a link in the wiring on my models the motor is able to run to it's full revs, and I believe it's similar still.

Tillson's trial bike had the speed restriction off.
 

piotrmacheta

Esteemed Pedelecer
Jun 23, 2009
316
0
I have to agree with the op, it is a great bit of kit, I have 3 bikes with them on now. Having the CA directly connected to the controller is a masterpiece as you can adjust everything. The only slight negative things I would say are that compared to a direct drive hub (I tried a Bionx) it's a bit noisier and generally feels fairly weighty.
 
C

Cyclezee

Guest
Thank you for the positive review and comments guys;)

I will respond in detail and answer any questions this evening when I have some time.

In the meantime, if anone has any specific questions regarding ezee kits or bikes, you can always email me directly

I don't spend as much time on the forum as I used to, so don't always pick up on threads that might require some input from me.

Regards,
 
C

Cyclezee

Guest
My understanding is that the ezee kits can be derestricted - perhaps yours is ?

This is most helpful review - Ezee kit is my probrably going to be my kit of choice for a hardtail build and this helps cement my view that its the best motor for the job (can't be bothered to cycle up the Downs anymore - just want to bomb down the other side!)

Not sure what differnce between their kits are . Website says Mark2 kits are coming soon.

Might John be able to give us a little more info ? And possible prices ?
Hi Kirstin,

You are correct in saying that eZee kits can be de-restricted for use on private land.

If I can just explain, eZee design and manufacture there own motors inhouse rather than buy in a generic 'off the peg" motor.

There are 6 kits available in the range, front or rear 20",26" and 700c.

We still have a few Mk1 kits available, but not in all sizes.

The Mk2 kit has an upgraded motor with a wider power band in comparison to the Mk1 and other hub motors on the market.

Other changes include a new inhouse designed battery gauge/power level console, new wiring harness, new improved pedelec sensor, etc.

These upgrades and improvement will also be on most the new eZee bike range too.

Of course these improvements and increased manufacturing costs mean the Mk2 kit will be more expensive.

While stocks last, the price of Mk1 kits will remain unchanged at £750
The Mk2 with a 10Ah Samsung celled battery will be £895 and £995 with the 14Ah version.
 

themutiny

Esteemed Pedelecer
Feb 26, 2009
354
0
By as much as 60% higher!

They were much higher geared though, so the new one has a hill climbing advantage.
Agreed Tony, but if you have the legs for it (and that is not easy) there is nothing to beat the original!
 

tillson

Esteemed Pedelecer
May 29, 2008
5,252
3,197
They all well exceed the 250 watt continuous capability, the Pro Connect at least 400 watts. It's how the power is interpreted and some fudges in the official measuring.

eZee are the most powerful standard legal e-bikes on our market, and the Giant Twist 2 comparison is very much two ends of the power scale. That Giant had much lower power to start with and incorporated regeneration, as a result having considerable motor drag, something that they later dropped. The end result being that it's usable power was only around half that of the eZee.
I don't want to open the legal / illegal debate again, but I am curious as to what exactly is illegal in terms of power.

I imagine that such perimeters as max assist speed and weight are easy to define and measure, thus making it easy to determine if a bike complies with the law. However, I'm not sure about the power aspect.

If the maximum power for a legal ebike is defined as being 250 Watts and I am riding a bike fitted with a 250 Watt motor and the Cycle Analyst is telling me that 600+ Watts is being supplied to the motor, am I still riding a legal bike?


How are the figures, "fudged" to make the bike comply?

Thinking about it, this does concern me a little, because I know that if something life threateningly serious happened to someone else as a result of me using my 250 Watt (400+ Watt) Pro Connect, it would be seized forensically examined and these, "fudges" would be exposed.

Having bought it in good faith as being a 250 Watt machine wouldn't be a defence. It might mitigate any offence, but some of the actual offences, no insurance for one, is an absolute offence.

Incidentally, I'm all in favour of more power for those who want it. I can't really see how more power translates into more danger as long as speed remains fixed at a sensible level.
 
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hech

Esteemed Pedelecer
Oct 29, 2011
352
27
argyll
"Its dead easy:

Legal ebike (as defined) = pedal cycle legislation.

Ilegal ebike (not complying with above) = Same law / penalties as with motor vehicles."
 

tillson

Esteemed Pedelecer
May 29, 2008
5,252
3,197
"Its dead easy:

Legal ebike (as defined) = pedal cycle legislation.

Ilegal ebike (not complying with above) = Same law / penalties as with motor vehicles."
I understand that. What I don't fully understand is, my kalkhoff Pro Connect is sold as being a 250 Watt fully compliant machine. However, I am told that at times, the motor will output in excess of 400 Watts and some motors, in excess of 600 Watts. All supposedly legal and I am riding around on one.

What I want to know is, what is this, "fudge" in the power measurement procedure that supposedly makes the bikes legal? Who has approved the, "fudge?" Will the, "fudge" stand up to scrutiny?

These are the questions, not when is and when isn't an electric bike classed as a pedal cycle.
 

hech

Esteemed Pedelecer
Oct 29, 2011
352
27
argyll
250w=sustained controller 36v*7amp rated continuous
perhaps capable of 15amp max 36*15=540watts peak.
Compliance certification does seem a trifle lax but a 250w max cap would make ebikes an unuseable, unsaleable commodity and is in everyone's interest to be realistic not anal.
 

amigafan2003

Esteemed Pedelecer
Jul 12, 2011
1,389
139
250w=sustained controller 36v*7amp rated continuous
perhaps capable of 15amp max 36*15=540watts peak.
Compliance certification does seem a trifle lax but a 250w max cap would make ebikes an unuseable, unsaleable commodity and is in everyone's interest to be realistic not anal.

I can guarantee with utmost certainty that 90% of "legal" ebikes sold in the UK, if you put a watt meter on them, will have a peak motor draw of more than 250w and if ascending a moderate hill or into a stiff headwind will continously draw more than 250watts as long as the hill or head wind continues.

The "250watt" limit is really the motors continous rated current, which makes my 180watt Tongxin fully legal with respect to the max wattage limit even if the max assist speed is not ;-).

I'll let Flecc comment on why the max continuous rating is relevant for UK legislation.
 

flecc

Member
Oct 25, 2006
53,361
30,710
Originally the early e-bikes complied with the then 200 watt limit and were largely useless, so manufacturers started to stretch the boundaries, eventually to 1000 watt peaks in the odd instance.

Modern legislation requires e-bikes to conform to a specification so they are tested to meet an EU 15194 technical standard. Mysteriously today's models gain the certification despite having consumptions up to about 700 watts when at full demand, meaning net power outputs up to the 500 to 560 watt region. The EU law clearly states maximum continuous power should only be 250 watts but these motors are clearly capable of continuous outputs well above that.

Since the labs testing state they measure the power at the motor shaft, which is clearly impossible on the majority of all e-bike motors in fully assembled working conditions, they must be fudging in some way, either stripping out the motor only and applying a guesstimate of losses to it's output when reassembled and under working conditions, or just telling porkies. In practice their job is virtually impossible to do to meet the legislative requirements of poorly specified law.

Whatever, don't worry, if it's specified as 250 watts by the manufacturer it's legal, and if 15194 certified as all the best makes are, you are doubly covered.
.
 
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