Oldman here

I'm new to E bikes. Up until August this year (2013) I was a fit road cyclist when a swelling appeared on my left knee; to cut the story short it turned out to be a very rare cancer for which I have had a major operation to remove the whole knee and the large quad muscle.

I now require help to choose an Ebike; depending on mobility of the knee that has been fitted with an "hinge" to enable rotation.

I have been through a lot of websites looking and found a few that tempt me but don't know enough about the equipment batteries power, out put etc. I think I may need throttle assist as well as pedal assist and the bike has to look like a bike; no Dutch type "step thrus ". I have ticked the BH e Motion Neo Race; Giant Roam (no throttle).

I'm 78yrs was fit enough to ride the Alps etc every holiday (8 weeks in France).

So I need your help

I think you need a bike that uses speed control rather than torque control. The speed control bikes will give power regardless of how hard you pedal. The power is adjustable via a panel on the handlebars. The torque control bikes multiply your pedal power, so you can't pedal lightly on a hill. I think I'm right in saying that all bikes with throttles use speed control, which makes things easy for you.

 

BH Emotion don't seem very good with support, so I can't recommend them like I used to. It wouldn't be so bad if they were reliable, but there's been a few problems reported.

I found this thread interesting with the picture below in http://www.pedelecs.co.uk/forum/electric-bicycles/16397-electric-bike-muscles.html

 

http://2.bp.blogspot.com/_4aC9SiM0WWE/S-2-bAhid0I/AAAAAAAAAFM/BBqlamDxr1Q/s1600/Cycling+Pedal+Stroke+%26+Muscles+Used.gif

 

Can you get on and off an ordinary bike OK? also tell us how you cope on one of your other bikes, will that leg now produce any force?

Thanks all

At present I have a brace from thigh to ankle; without it I will fall over, but due for physio and rehab in January after which I will be fitted with a more versatile brace. I can bend the knee to approx 60 degrees but will need nearer 90 before I can turn pedals (physio will help). Haven't put my leg over a bike since August.

More suggestions for a bike will be welcome. I can buy a BH Neo Race from my local bike shop won't this help with back up?

I've been looking at the Diavelo Bagii Urban if stripped down a little could be lighter than 23kg and a nice looking bike

Edited December 18, 201312 yr by oldman

Not really a bike suggestion, but I used pedal shortners from Highpath Engineering Highpath Engineering, EGGring chainrings and Pulse cycle components on an ordinary bike after I'd had 2 knee replacements, but I had 90 degree of flexion then. I believe the swing pedal is for more restricted movement. The good thing is you can gradually extend the length of the crank as your range of movement improves. Hope this helps.

I can buy a BH Neo Race from my local bike shop won't this help with back up?

It depends whether they don't mind giving up their profits to rebuild your wheel at their expense when your spokes start breaking.

 

The Neo doesn't have a throttle, so how are you going to get started? You'd be much better off getting another bike that has a throttle. You need something like a Ezee Torque, which is a really nice bike to ride. I don't think you'll find a ready-made bike that looks like you want with a throttle. The alternative is to convert your own bike, or get someone to do it for you. Cyclezee can do it, and so can Xipi. There's also others springing up.

At the moment I guess it is tricky to know how you'll get on. A good crank drive will give you an experience that is closest to a normal bike, but that might not suit your ability now. Or you may have to have an interim bike that is a step-through, hub drive and has a throttle.

 

It is difficult to say so early on after the surgery.

I can't see why a crank-drive would be suitable. Only the Woosh has a throttle. The Kudos Ibex has speed control,but I think they tookoff the throttle. Nearly all the others have torque control, so with power from only one leg, the power from the motor will be much reduced.

I didn't say a crank drive would be suitable, I said it will give you an experience that is closest to a normal bike. However in the future old man may find that a crank drive will work.

I didn't say a crank drive would be suitable, I said it will give you an experience that is closest to a normal bike. However in the future old man may find that a crank drive will work.

Yes, but it would be better to save it for later. It'll only confuse him for now to bring in irrelevant facts. He's probably already been investigating a lot of delectable crank drives getting all the juices going only to find that he can't ride them.

he probably can ride this CD:

 

 

http://wooshbikes.co.uk/santana-cd/santana-cdl-gunmetal-800.jpg

Not really a bike suggestion, but I used pedal shortners from Highpath Engineering Highpath Engineering, EGGring chainrings and Pulse cycle components on an ordinary bike after I'd had 2 knee replacements, but I had 90 degree of flexion then. I believe the swing pedal is for more restricted movement. The good thing is you can gradually extend the length of the crank as your range of movement improves. Hope this helps.

 

 

Thank you for this article; I will no doubt be making use of one of the devices, depending on the outcome of physio

Thanks but no thanks; it's a step thru, my roots in cycling go too far back to ride one whilst my clubmates are on "normal" shaped bikes

Thanks but no thanks; it's a step thru, my roots in cycling go too far back to ride one whilst my clubmates are on "normal" shaped bikes

 

If your clubmates are the usual up their own fundament roadies, they will like your new ebike even less.

Thanks but no thanks; it's a step thru, my roots in cycling go too far back to ride one whilst my clubmates are on "normal" shaped bikes

 

you need to put your body's needs first.

If you have a bike you like already I would seriously look at having a kit fitted, specify a throttle and PAS as your leg improves you may find holding the throttle on longer rides can be irritating. Your bike will probably be better than most ebikes equipment level, be lighter weight wise and be more accepted by your riding buddies.

Edited December 19, 201312 yr by Geebee

It depends whether they don't mind giving up their profits to rebuild your wheel at their expense when your spokes start breaking.

 

The Neo doesn't have a throttle, so how are you going to get started? You'd be much better off getting another bike that has a throttle. You need something like a Ezee Torque, which is a really nice bike to ride. I don't think you'll find a ready-made bike that looks like you want with a throttle. The alternative is to convert your own bike, or get someone to do it for you. Cyclezee can do it, and so can Xipi. There's also others springing up.

 

Hi Dave,

 

Just wanted to point out that eZee Sprint, which is available with diamond frame and stepthru, has the same electrics as the Torq, the main difference is 26" wheels and Nexus 8 speed hub gears.

Also the Forza RWD, shares the same electrics as the Torq and Sprint, the main difference is the Forza has a rear motor wheel.

Hi Dave,

 

Just wanted to point out that eZee Sprint, which is available with diamond frame and stepthru, has the same electrics as the Torq, the main difference is 26" wheels and Nexus 8 speed hub gears.

Also the Forza RWD, shares the same electrics as the Torq and Sprint, the main difference is the Forza has a rear motor wheel.

 

Quite like the Torq. I take it has a throttle and pas. Opinions please on front or rear motor. I see that with a front motor a rear wheel puncture would be easier; but won't the steering be a little compromised?

Found the Commuter Kube. Anyone tried it?

The way my knee is able to bend after 2 months post op without physio I may be able to us PAS and have a throttle as back up. Intense physio in January

Hi Oldman,

 

Yes, the Torq along with all eZee bikes has a throttle in addition to pas.

 

As for opinions on front or rear, there are many, here are just a few of the Pros & Cons

 

• front motor gives in effect 2 wheel drive, front electric & rear human.
  
• rear motor has better traction on very loose surfaces
  
• front motor steering is heavier, but most don't find it a problem
  
• Punctures are easier to fix with a front motor
  

 

The full specification of the Torq and Forza can be seen via the following links:

eZee Torq Mk3 - electric bikes and conversion kits

eZee Forza Mk2 - electric bikes and conversion kits

 

Here is a link to a recent eZee retro-fit conversion http://www.pedelecs.co.uk/forum/electric-bike-reviews/16330-cyclezee-kit-review.html#post200306

 

Finally, hope the physio goes well;)

If you have a bike you like already I would seriously look at having a kit fitted, specify a throttle and PAS as your leg improves you may find holding the throttle on longer rides can be irritating. Your bike will probably be better than most ebikes equipment level, be lighter weight wise and be more accepted by your riding buddies.

Both eZee bikes and retro-fit conversion kits have a cruise cruise control setting which eliminates having to constantly hold the throttle in e-bike mode.

Sold all my bikes during a "down" period; only a "fixie" left. I don't fancy converting that!!

only a "fixie" left. I don't fancy converting that!!

 

That could be interesting - you'd either have to pedal or put your feet up on the bars

 

I should think the 48 volt, panasonic hub-motored Ktm erace-p would keep up with your roadie mates, but not sure if it has a throttle.

Edited December 19, 201312 yr by jackhandy

It does not have a throttle although the assistance feels so strong in top assistance mode that it almost feels as though you do Worth trying one!

Worth trying one!

 

the guy is 78 with only one good leg, honestly.

the guy is 78 with only one good leg, honestly.

You took the words right out of my mouth, Trex!

 

I'm sure that there are no electric bikes like Oldman wants. He will have to compromise on the looks, or buy any bike on Ebay, or wherever, that he does like, send it to Cyclezee for Ezee kit fitting (or Xipi for Xipi kit) cost £25 by Paisley freight, then get it shipped back for £35, and then he'll be able to ride round with one good leg with or without (probably with) pedal crank reducer, and live happily ever after.

 

Please, no more silly suggestions to confuse the issue. Unless Oldman gets a leg transplant, his criteria are: must have throttle, must have good torque, needs to look racy (reading between the lines). Only the last can be compromised. The first two are prerequisites.