Converting Specialized Hardrock, Some questions!

crotchrocket

Pedelecer
Mar 30, 2012
38
3
I poped an introduction into the other thread, but would like to discuss some e-bike options that i have been looking into.

I've been lurking and reading posts here so thought i'd join. I went and test rode a Cyclotricity mountain bike last week and although the test ride proved the kit will work well for me the bike was very poor and i wouldn't want to ride it, just testing the brakes in the showroom by pushing the bike and applying the brakes made the front forks bend. Imagine all 115kgs of me jumping on the anchors at 15mph. I'd be eating the dirt, if not impaling myself onto a fork tube!

my left leg doesn't really work too well, i have no quads muscle for a start. I ride a motorbike still and i get away with it OK. I just lift my leg onto the foot peg then always stop so that i put my right leg out and I'm fine with that on a bicycle too. So the reason i want an electric assist is for starting off. If i have my good leg holding my up and my bad leg resting on the pedal, i can't really lift a foot up and start peddling without a few wobbles. The electric motor would allow me to engage forward and then lift up my good leg and start peddling. Secondly, riding with one leg and being very unfit is just going to make me not want to ride as i will fatigue very quickly and loose interest in gaining stamina.

To cut a long story short, i bought a Specialized Hardrock on the weekend which is great, i've been riding it around and its perfect for my needs. I also made sure i got one with V brakes over discs as i don't know what kit i want.

I really like the 8Fun kit with the bottle mount battery, its £429 on Ebay. If it works well then I'm happy to spend the money, but i only want to spend it once.

Do you think this kit will be OK with me being 115kg's? The idea is it will assist me as i want to loose weight so i don't want something I'm going to ride like a motorbike, I want something that will help me get to a trail and enjoy riding it and enjoy getting fit. Im just concerned it won't have the power to help me out enough on a steep hill.

I've seen some 36v 750w kits. I know these aren't for the road. But would it be overkill for my needs?

Any help would be much appreciated!!
 

JuicyBike

Trade Member
Jan 26, 2009
1,671
527
Derbyshire
That kit should be fine for you.
We recently had a customer with very similar requirements as you who found some very useful crank extender kit, made in the UK, which we added to his bike.
He is about to post a review, so I recommend you watch out for his experiences.

Another chap on these forums, who hasn't posted recently, is Allen-UK (or similar), and has a wealth of useful advice which may be pertinent.
 

crotchrocket

Pedelecer
Mar 30, 2012
38
3
Thanks for the reply. Im sort of thinking i might jump the gun and just buy it so i can fit it over easter and have some fun with it.
 

JuicyBike

Trade Member
Jan 26, 2009
1,671
527
Derbyshire
Thanks for the reply. Im sort of thinking i might jump the gun and just buy it so i can fit it over easter and have some fun with it.
Yes, I like that! I'll look out the details of the crank extender -a company in Stoke - which enables one side (or both) of the crank to follow a shorter radius and so reduce movement of the upper leg. Clip-on pedals are also useful to help pull up the crank on the reverse stroke, helping the weaker leg.

That's a great price for a kit by the way!
 

flecc

Member
Oct 25, 2006
53,270
30,654
Another chap on these forums, who hasn't posted recently, is Allen-UK (or similar), and has a wealth of useful advice which may be pertinent.
That's right, I've mentioned Allen in my response in the "Introduce Yourself" section, and also our other one-leg member, Stumpi.

A swing crank can help with a single leg problem, here's one from cycle engineering specialist Highpath Engineering.
 

NRG

Esteemed Pedelecer
Oct 6, 2009
2,592
10
An alternative view given what I understand from your post...I would be inclined to spend a touch more and go for one of the eZee kits...Only because you mention 'spend once' and the eZee kits are probably the best kits you can get and is very good for support....
 

JuicyBike

Trade Member
Jan 26, 2009
1,671
527
Derbyshire
The company in Stoke (I'll have their details tomorrow) charged around £60 for a similar kit that we fitted to one of our Sports.
 

crotchrocket

Pedelecer
Mar 30, 2012
38
3
Thats a very interesting idea, and one that would help the pain in my left knee when cycling over distance by reducing its movement, i don't need to put much effort through that pedal as the muscles don't really work anyway! Thanks!


That's right, I've mentioned Allen in my response in the "Introduce Yourself" section, and also our other one-leg member, Stumpi.

A swing crank can help with a single leg problem, here's one from cycle engineering specialist Highpath Engineering.
 

crotchrocket

Pedelecer
Mar 30, 2012
38
3
Thanks NRG. But with the purchase of the bike, thats a little more than i can spend.

I just bought the 8fun kit with delivery expected wednesday!! Exciting!


An alternative view given what I understand from your post...I would be inclined to spend a touch more and go for one of the eZee kits...Only because you mention 'spend once' and the eZee kits are probably the best kits you can get and very good for support....
 
C

Cyclezee

Guest
Good luck with your project crotchrocket;)

Of course, if you had bought an eZee kit you would have got a free torque plate set:eek:
 

jerrysimon

Esteemed Pedelecer
Aug 27, 2009
3,292
112
Cambridge, UK
Damn, so now you're giving them away free :p

Regards

Jerry
 

crotchrocket

Pedelecer
Mar 30, 2012
38
3
Is it a good idea to install a torque plate?

Ps. I just managed to blog something by mistake, if a mod see's this would you mind deleting it plea lol