Cytronex review

HarryB

Esteemed Pedelecer
Jan 22, 2007
1,317
3
London
A few weeks ago I submitted a review of my Cytronex after 5 months or 1000 miles - I cannot find it published anywhere. As it took some considerable time to write up I am afraid I won't be doing it again! Shame as there were some useful tips about the brakes.

Anyway it is great and if anybody has any questions about the Cytronex then drop me a message.
 

flecc

Member
Oct 25, 2006
53,152
30,567
I'll relay this link to Russ to see what's happened Hal.
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flecc

Member
Oct 25, 2006
53,152
30,567
Russ is looking back though piles of stuff in an effort to find it Hal, so it could turn up now.
.
 

HarryB

Esteemed Pedelecer
Jan 22, 2007
1,317
3
London
When I submitted it I did get a response along the lines that it would be published within 48 hours - I then promptly forgot about it. I suspect it got lost somewhere or I saved it in the wrong place.
 

Barnowl

Esteemed Pedelecer
Sep 18, 2008
954
1
I hope it's not lost. I look forward to reading it. I have a question. What were the useful tips about the brakes about?
 

Barnowl

Esteemed Pedelecer
Sep 18, 2008
954
1
Did anything turn up? I'd also be interested to read this.
I keep checking the reviews but I haven't seen anything yet. I'm feeling a bit lonely of late on the forum and sadly I get excited when I see the word Cytronex get a mention. I've started putting a review together myself. To be honest I didn't think there was much interest since Cytronex had seemingly slacked off for the winter. I've had mine 6 months now. It's been a cracking bike.
There's a veritable plethora of pros but I'm struggling a bit with the cons. Apart from the range (about 20miles - but I did 25 the weekend and still some to spare), the non-lockable battery and the original saddle, which I had replaced anyway before purchase, I can't find anything wrong with it - given its strictly legal assistance limit of 15.4 mph. I was hoping Harry might have a more critical eye given, I believe, he's done more miles and has experience of other bikes.
 

flecc

Member
Oct 25, 2006
53,152
30,567
I don't know if Russ had any luck searching for Hal's misplaced one, but without any review of the Cytronex on site, any one would be welcome.

It's too important a design to be neglected, regardless of current availability.
.
 

HarryB

Esteemed Pedelecer
Jan 22, 2007
1,317
3
London
I think the review has been lost - partly my fault for not chasing it up sooner but I am sure I got a confirmation note saying it would be published in 48 hours. If there had any doubt I would have kept a copy - a lesson now learnt!

If nothing turns up I'll see if I can remember what I said. Overall I am very pleased with the bike. Any problems have been to do with the Trek side of things, not the Cytronex which is first rate.

For an example I had a problem where the power refused to come on after repeatedly pressing the button. I assumed that it was a connection problem (having been used to riding a Torq) and to be honest felt depressed that I hadn't found a reliable bike. I very quickly discovered that it was the switches on the brake levers that weren't closing - initially I thought it was the cold as I had been warned to check them in freezing conditions, but it turned out to be that the Avid V brakes were seizing and as much as I tried to free them/oil them this still kept happening. I replaced the brakes with some quite posh shimano XTs which are very powerful and more importantly the pads seem to be lasting longer than the original set up.

If the bike could be improved my suggestions would be:

Put the on off switch on the other side so the power setting is operated by your right hand. Otherwise your right hand is doing most of the gear changing and at the same time trying to get the power on. I have also got a mirror on the right hand side which can get bashed as I go for the power. I most use the power button, only going for the power change button occasionally when I need to go slowly - say following a line of cars in traffic.

The battery holder - I think this needs to be purpose designed rather than off the shelf - or at least modified. A couple of problems - one is that the battery gets quite scuffed as you put it in and out (metal against painted metal). The other is that it has got quite loose and tends to rattle about a bit (this is getting worse). I am going to try and put in some rubber strips of something to support it better - not sure how I am going to do this.

So not many reasons to fault the Cytronex but the installation is such that modifications say to the brake/gear levers or handlebars are impossible (I would like to put in Magura hydraulic rim brakes) but for me that is a small price to pay for reliable transport to work and back.

ps the finish on the bike is rubbish compared to the Kalkhoffs - the paint is very easily scuffed and is now getting worn from all the cable rubbing (inevitable I know). The alloy bits are looking tarnished so it no longer looks new. In fairness it has been through a rotten winter with plenty of salt of the roads and if I thought more I would have put a better protective layer on.


Mileage 1200
Replaced:
Saddle - replaced with the suspension post from my Agattu + gel seat
Tyres - Marathon Plus
V Brakes Deore XT
 
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Barnowl

Esteemed Pedelecer
Sep 18, 2008
954
1
Thanks for that. It was interesting.

I've only done about 650 miles on mine and I kept it off the road once the gritters started.

I've checked the bike over a few times but apart from tightening the odd nut a bit I've not had to do any maintenance work. Eveything is as purchased with Gel saddle and mudguards as optional extras.

I've got some slight scuffing on the front fork and a couple of minor scratches on the crossbar but nothing you'd notice except on close inspection. I have to agree though the paint is very easy to scratch.

No issue with the battery holder yet. It's still nice and firm. Minor marking on cage and the plastic Cytronex bit that holds it in place but you don't see that when it's on the bike.

Trek saddle I avoided by buying the gel one. I have the Trek saddle but I've never tried it. Thanks to Aldby and Chris Bike for that.
I hope the rest of the review turns up. As soon as I have time I hope to sort one out myself.

PS. I've had the power fail to come on once. That seemed to be the cable adaptor that screws onto the battery since I reconnected it and the power was back on. Could have been a brake issue though.
 
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eTensai

Just Joined
Sep 25, 2008
3
0
The battery holder - I think this needs to be purpose designed rather than off the shelf - or at least modified. A couple of problems - one is that the battery gets quite scuffed as you put it in and out (metal against painted metal). The other is that it has got quite loose and tends to rattle about a bit (this is getting worse). I am going to try and put in some rubber strips of something to support it better - not sure how I am going to do this.
Harry - I would get the battery holder sorted ASAP if I were you. A rattling battery was part of the cause for some major re-work on my bike recently. Mark is using a new design which holds the battery a lot better in my opinion. Mark also suggested trying to bend the cage back to tighten the hold, but I think you'd need to be careful not to stress the cage. I've also taped some thin padding to the bottom of the battery to stop it getting scuffed and worn.

I'll pass 2000 miles on my Cytronex tonight, so seems a good time to post a review when I get the chance.

Interesting to note your comments in regard to the brakes, I had the same problem a couple of times, took a while to realise what was happening first of all.

Cheers,

Ian
 

Barnowl

Esteemed Pedelecer
Sep 18, 2008
954
1
Ian: Reassuring that you've done 2000 miles. Mines had far too easy a life.
I'd be interested to know how the batteries holding up since presumably it's had about 100 recharges and in theory I guess the miles per charge starts dropping off. Unless you are using 2 batteries.
 

wotwozere

Esteemed Pedelecer
Sep 6, 2008
280
1
Hi Barnowl

You did not miss too much it was a slow and difficult read for most.

thx

Bob
 

Mark/Cytronex

Pedelecer
May 22, 2008
89
4
Winchester
www.no-hills.com
Harry's review

I haven’t had a chance to post on the forum for some time as we have been working very hard on the 2009 Cytronex system. However I think it is important to answer some of the technical questions raised here.

We launched Cytronex last year with just 100 bikes produced for test marketing. The reason for this was two fold: 1. To see how the system would be received in the market, 2. To test reliability of the design and components, and to ascertain what modifications would be necessary before producing on a larger scale.

I am very glad to say that we are now totally convinced of the concept’s appeal and I apologise to all those who have been waiting for some time for our 2009 system to be released. However I am sure you will find it has been worth the wait.

The 2008 Cytronex certainly had the aesthetics I wanted to achieve but each bike was very labour intensive and impossible for a layman to build themselves without a week’s training! The task I set us was to achieve the same level of aesthetics in an easy fit kit that could power a wide variety of bikes. Along the way we have addressed many of the issues raised by Harry here.

So in answer to some of Harry’s points:

1.Battery rattling – your battery should not rattle and after I saw the very extreme example in Ian’s case I meant to do a general email in case there are who are putting up with this. The problem is caused if the battery is pulled out inadvertently at sufficient angle to bend the cage. Ian was obviously a lot more tolerant than me and put up with the noise but in fact it can be very easily solved. Just carefully but firmly grip the extended cradle part of the cage and push it back in towards the down tube until it just starts to bend back a little. Then try the battery again and repeat until tight. Your battery should not rattle at all! It is in fact the rattling the causes the wear marks on the casing. There is very little wear on well used bikes that have tight fitting bottle cages. We are now using a stronger cage but this is only because Trek discontinued the previous one and we had to find another supplier. The old type is on my existing bike which is approaching 3,000 miles without a problem.
2.The brake switches have worked well but we are currently testing a new type which should be more or less bomb proof as well as easy to fit. Harry has mentioned an issue with the existing switches that we have found on two other bikes which have been used throughout the winter. The extreme amount of salt and grit on the roads this winter can make V brakes seize up. Once this happens there is no spring in the brake levers and the controller thinks that the brakes are permanently on. A bit of cleaning, oiling the pivot points and then moving them backwards and forwards will soon free them up again.
3.The scuffing on the fork can be resolved with a cable tie to hold the cable in position at the top of the fork.
4.If your paintwork is looking a bit jaded with all the salt on the roads a clean and wax polish may bring back the shine. Unfortunately salt attacks just about everything and I have seen the evidence on several other brands of bike recently. My own bike has faired rather better but then I use mainly country roads to work and they are rarely salted.
5.Interesting what you say about the buttons being the other way round Harry. We put it on the right because it is the most frequently used button, but I take your point. The 2009 system gets round this because we have some very nice new components which put the buttons right by your thumbs instead of in the bar ends. Therefore you don’t have to move your hand to press the boost button.
6.Harry’s point about modification is also a good one. You can’t change much on the bars with the 2008 Cytronex because wires run though to the bar ends and the brake sensors are installed in the brake lever casing. This is changing in the 2009 Cytronex, with the buttons by your thumbs and the brake sensor in a different position it will be straight forward to replace any components on the handlebar, or the handlebar itself. If you have a look at the kit when it comes out Harry I am sure we could modify yours in the same way if you wish.
7. Just one further tip - every 1,000 miles or so I recommend a deep discharge to optimise the battery capacity and power. To do this use your bike until the power expires then place the front wheel on a stand so that the wheel is free to spin. Then set it on low speed and press the boost button and leave it running until it stops. Don't do this immediately after recharge or it will take all day to stop. Then leave it half an hour before switching on again, once again leaving it until the motor cuts out. Obviously don't leave it running like this if there are children or animals arround. Finally leave the battery an hour or so before fully recharging. This should boost the battery capacity and power.

Regards,

Mark
 

Barnowl

Esteemed Pedelecer
Sep 18, 2008
954
1
Hi Mark and thanks for the update.

I hadn't realised that the mild scuffing on the fork was caused by the cable. I just checked it and it is. Easily rectified thanks.

As mentioned earlier I was able to stay of the roads once the salt & grit went down so no issues there.

No problems with the cage either.

PS. I'm as chuffed with the bike as I was on day 1. :)