Wisper 806fe Preview

[Wisper Bikes]

Hi Guys

I thought some of you may be interested in a preview of the new Wisper 806fe. The wheel base is slightly longer than the old 805 and we have added a second drive wheel to give the bike 16 gears. Those who have tried it out say it is more like a road bike than a folder.







All the best David

 

[torrent99]

Hi Guys

I thought some of you may be interested in a preview of the new Wisper 806fe. The wheel base is slightly longer than the old 805 and we have added a second drive wheel to give the bike 16 gears. Those who have tried it out say it is more like a road bike than a folder.

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All the best David

Looks nice. Is that Dahon based by any chance?

 

[Wisper Bikes]

Oh Dahon

Not at all Torrent but now you point it out.





As you can see not the same but yes the same style.

All the best David

 

[flecc]

Nice one David, there'll be plenty of demand for that, a folder with a good gear range. It's unusual in having a front motor but looks neat all the same. Any indication of the actual motor power compared with your 905 range?
.

 

[Wisper Bikes]

Motor Power

Hi Flecc

Nice to hear from you!

Thanks for your comments, it is a pretty bike!

The motor is the 250w Bafang as per all our range but as the bike will be used on shorter runs the battery is a 24V 9A on this first edition. The more expensive larger battery option may be considered for 2010 but we believe the 24V 9A will suffice for this particular part of the market where weight is a big issue.

Best regards David

 

[flecc]

Thanks David, that will be enough power then. I think one of our members in San Francisco might be very interested when these are released, so maybe one for Tentcot.
.

 

[Wisper Bikes]

Tent Cot

Hi Flecc

Unfortunately we have had a falling out with Tent Cot after we held an exhibition for them at Olympia and their Australian rep was doing deals with my customers behind my back and the whole thing got out of hand, so I am afraid at the moment we are not represented in the USA but that won't be the case for long.

All the best David

 

[keithhazel]

Hi Flecc

Unfortunately we have had a falling out with Tent Cot after we held an exhibition for them at Olympia and their Australian rep was doing deals with my customers behind my back and the whole thing got out of hand, so I am afraid at the moment we are not represented in the USA but that won't be the case for long.

All the best David

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having done most of my e-biking on folders i have worked out the niggly things about them...to my cost of course...but this looks very exciteing as being a non car driver and a user of the train and bus a lot this looks great..
are there any specifications for it with accurate figures...mainly the usual ones..range,.......is it pedelec,throttle,both....with gearing of this nature will it be easy without going mental to pedal past the 15mph if assist is an option.....is it going to be deristrictable.....how will the bigger battery alter figures......oh and the 69000 dollar question...how much ?....
thanks keith

 

[Footie]

Nice looking folder.
I like the idea of the motor at the front allowing all those gears on the rear. That's possibly along the lines of the next ebike I may go for.
Unfortunately, I'm plagued by hills, so I would likely have to wait until 2010 for the bigger battery option.
What size are the wheels?
And
Will you be doing a higher voltage version (36v) for us hill dwellers?
.

 

[Danny-K]

Nice looking folder.
What size are the wheels?

Footie - David will provide the definitive answer in due course, but in the meantime for info: from the photos they can only be 20" wheels. Of that I'm more than certain.
20" wheels are superior to the smaller 16" wheels in ride-ability, (16" wheels favoured by Brompton), giving a far nicer ride at the expense of the 16" wheels main benefit - ultra compact fold-ability. A 20" wheeled folder cannot fold as small as a 16 incher.

 

[Wisper Bikes]

Specs

Hi thanks for all your interest.

Basic specs are

24V 9A Lithium battery (36v 10A edition in 2010 if needed)
250W Bafang motor
18 Kg
20" wheels
40 - 45km Range
No throttle
Hi Lo power switch
All stainless steel or alloy (no rust)
De - restrict possible for off road use.

And the $64,000 dollar question................ £949.00 inc VAT

Best regards David

 

[keithhazel]

Hi thanks for all your interest.

Basic specs are

24V 9A Lithium battery (36v 10A edition in 2010 if needed)
250W Bafang motor
18 Kg
20" wheels
40 - 45km Range
No throttle
Hi Lo power switch
All stainless steel or alloy (no rust)
De - restrict possible for off road use.

And the $64,000 dollar question................ £949.00 inc VAT

Best regards David

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as i ride 99% of the time off road then the de-restrict would be most handy,and as no throttle i guess that means pedal or pedelec assist only..so what would it assist up to in off road mode ?...and when are they available ? in pedal only mode is there much drag ?..cos my Quando used to feel i was dragging a bag of cement in pedal mode

as for 36 volt one... performance difference will be ?.. what price will that one be and how early 2010 are we talking >
thanks keith

 

[Wisper Bikes]

Details

Hi Keith

Thanks for your interest, to answer your questions;

The de-restrict will simply Letta you ride through the 25kph, 15mph limit without assistance cutting out the motor will be geared to the 20" wheel at about 19mph maximum so basically the motor will always assist you but it doesn't do much to help past that point.

They will be in UK on the late May container.

We don't know what the performance of the 36v will be and we have not made a firm commitment to produce one, by all accounts from the testing yesterday it may not be needed, it really depends on how the comments we get from customers on the 24v.

All the best David

 

[keithhazel]

Hi Keith

Thanks for your interest, to answer your questions;

The de-restrict will simply Letta you ride through the 25kph, 15mph limit without assistance cutting out the motor will be geared to the 20" wheel at about 19mph maximum so basically the motor will always assist you but it doesn't do much to help past that point.

They will be in UK on the late May container.
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as i live in a relatively flat area this all sounds good/excellant....the big bug with normal 6 speed 20 inch wheel bikes is they are so undergeared to get anywhere near 15mph i have had to ride at an uncomfortable pace...with the extra gears...buckets of them too...can i be hyperthetical here and then you are only answering hyperthetically too so no commitment...if on my old 6 speed 20 inch wheel bike i was at my comfortable cadence i think the term is...and i was doing 12.5mph...with the top gear in this 16 speed bike what would be your best guess i would be doing ?...guess's can not be used in court to sue you..haha
regards keith

 

[flecc]

As ever with small wheel bikes Keith, although there are plenty of gears they don't go very high. For comfortable road use a bike really needs a top gear of at least 85" and preferable 90" or more.

The 806fe appears to have a 48 tooth large chainring and a 11 to 13 tooth top gear rear sprocket.

If it's a 13 tooth rear, the pedal cadences will be as follows:

60rpm = 13.2 mph, 70 = 15.4 mph, 80 = 17.6 mph, 90 = 19.8 mph

If it's a 12 tooth rear, the pedal cadences will be as follows:

60rpm = 14.4 mph, 70 = 16.7 mph, 80 = 19 mph. 90 = 21.4 mph

If it's an 11 tooth rear, the pedal cadences will be as follows:

60rpm = 15.6 mph, 70 = 18.2 mph, 80 = 20.8 mph, 90 = 23.4 mph

N.B. 90 is the optimum cadence often used by club sport riders, spinning quite fast.

The gear inches are 74" for a 13 tooth rear sprocket, 80" for a 12 tooth and 87" for an 11 tooth. The Quando's gear inch measurement is just under 70, so the 806fe will improve on that.

P.S. If David confirms a different and smaller top gear rear sprocket, I'll recalculate for that.
.

 

[Wisper Bikes]

13 tooth

Hi Flecc

Thanks for that.

The original spec was 50 12 but I will confirm tomorrow as we were having the odd problem, that is why we ended up using the chaindrive from a racing style bike. I always felt that electric bikes needed as big a chaindrive as possible and the smallest high gear sprocket on the back as the motor will help a rider keep to a nice easy cadence whilst traveling at 15mph. Most folders have tiny chaindrives as low as 32 tooth which in my humble opinion is much use as a chocolate tea pot.

All the best David

 

[flecc]

That's absolutely right David. I couldn't get an accurate assessment of the chainwheel as 48 or 50, but 50 would be good. I'll look out for your answer tomorrow.

Since you haven't got a rear motor it would be good if you could source a compact rear setup similar to Shimano's Capreo folder specific set. Your present lowest gear on the 806fe is only about 18", probably too low to ride since it means 3.1 mph at a 60 cadence and only 4.7 mph at a 90 cadence, so it wouldn't hurt to lose the megarange sprocket which would mean a much smaller rear mechanism could be specified.
.

 

[keithhazel]

As ever with small wheel bikes Keith, although there are plenty of gears they don't go very high. For comfortable road use a bike really needs a top gear of at least 85" and preferable 90" or more.

The 806fe appears to have a 48 tooth large chainring and a 11 to 13 tooth top gear rear sprocket.

If it's a 13 tooth rear, the pedal cadences will be as follows:

60rpm = 13.2 mph, 70 = 15.4 mph, 80 = 17.6 mph, 90 = 19.8 mph

If it's a 12 tooth rear, the pedal cadences will be as follows:

60rpm = 14.4 mph, 70 = 16.7 mph, 80 = 19 mph. 90 = 21.4 mph

If it's an 11 tooth rear, the pedal cadences will be as follows:

60rpm = 15.6 mph, 70 = 18.2 mph, 80 = 20.8 mph, 90 = 23.4 mph

N.B. 90 is the optimum cadence often used by club sport riders, spinning quite fast.

The gear inches are 74" for a 13 tooth rear sprocket, 80" for a 12 tooth and 87" for an 11 tooth. The Quando's gear inch measurement is just under 70, so the 806fe will improve on that.

P.S. If David confirms a different and smaller top gear rear sprocket, I'll recalculate for that.
.

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as ever Flecc my constant interests in folders does seem dumb...but my needs are different,ride,train,bus is how my journeys are..sometimes in summer i will even forsake the bus and ride the last 8 miles... now pick yourself up off the floor.....when the original comment of 19mph top speed assist was mentioned i had hoped that was achieved by not pedaling as if the devil was chaseing you, now im not so sure...never having counted my cadence...am i right in saying thats how many revolutions per minute ?...thinking about it i cant see more then 50 a minute without putting me lycra's on...in this case someone else's....i remember taking my edison to a bike chap and he put what looked a huge chainwheelon it...maybe just 1 and half inches in diameter extra but looked huge..that only increased my pedelec speed to 12.5mph,an increase of 1mph...which is why i got rid, i wasnt going to pedal at 3mph less then i could throttle...and worse was as it was 24volt only there was no power in wind or gradients.....looking back on that one and the others ive had..............ive had everything i should not have had so surely im due the right one..hahah...and if wisper want a test rider then im their man ..... ......

 

[Wisper Bikes]

Thanks!

That's absolutely right David. I couldn't get an accurate assessment of the chainwheel as 48 or 50, but 50 would be good. I'll look out for your answer tomorrow.

Since you haven't got a rear motor it would be good if you could source a compact rear setup similar to Shimano's Capreo folder specific set. Your present lowest gear on the 806fe is only about 18", probably too low to ride since it means 3.1 mph at a 60 cadence and only 4.7 mph at a 90 cadence, so it wouldn't hurt to lose the megarange sprocket which would mean a much smaller rear mechanism could be specified.
.

Flecc you off course are absolutely right in the lowest gear my SFH legs were spinning so fast they were a blur just to get enough momentum to stop falling off.

We will get rid.

All the best David

 

[flecc]

am i right in saying thats how many revolutions per minute ?...thinking about it i cant see more then 50 a minute without putting me lycra's on...

That's it Keith, cadence is in pedal revs per minute (rpm). Given that many find the 65 cadence on a Kalkhoff a bit fast at 15 mph, you'd probably be able to accept something in the region of 55 to 60 cadence. I'll confirm when David has the rear sprocket size, but you'll probably be ok on the 806fe since it's looking as though that will give about 15 mph at that, a big improvement on your previous folders.

I wouldn't be too worried about having a 36 volt setup on the 806fe. Given the power and torque of the SB motor at 36 volts, there could be wheel spin with the front wheel motor on the steepest hills with the weight off the front wheel. With it's big gear range it should be easy to climb just about anything with the 24 volt version, and the greatly reduced weight with the smaller battery is very welcome on a folder which might need to be carried.
.