Dynamo Wheel for a Globe Daily bike

[John_S]

Hi All,

I'm posting this message because a recent post by hjd10 really caught my attention.

https://forum.cyclinguk.org/viewtopic.php?f=5&t=137267

Seeing this message made me think to pull my finger out and sort out a dynamo lighting set up for my wifes bike. I have dynamo lighting on my own bike but my wife has rechargeable lights on her bike and she doesn't like having to take them on and off to charge them versus my bike whereby the lights are fit and forget and just one whenever you go. Therefore I want to get her a dynamo hub wheel.

That's where this thread caught my eye with the wheel recommended by alexnharvey above being this one:-

https://www.taylor-wheels.com/28inch-bike-front-wheel-zac2000-with-sport-hub-dynamo-silver

Now my wifes bike is a Globe Daily step through frame bike and it's very similar to the one on the link below but I think that this is a current model whereas my wifes bike is about 8 years old.

https://www.specialized.com/gb/en/globe-daily-1-step-through/p/38027

It's a rim brake bike with silver rims so I'm hoping that the wheel above should be fine.

On this subject are most front hub widths standard? The hub on the Taylor Wheels dynamo wheel is OLD 100mm and hopefully that will be fine?

Also I can't work out whether or not the Taylor Wheels wheel comes with rim tape installed or not and don't know if anyone else can tell? If it doesn't come with rim tape then it says that the Rim size is ETRTO 622-19 so does this mean that the internal width is 19mm?

If that's the case if the wheel doesn't come with rim tape and I need to buy some I think that you need to use rim tape slightly wider than the rim internal width or am I wrong? If I'm right should I buy 20mm rim tape or 22mm rim tape?

Thanks for any help and advice.

Best regards,

John

[Brucey]

100mm oln is normal. Rim tape can be transferred over in some cases.

Biggest bargain in the dynohub world is the decathlon wheel for £29, and is perfectly adequate for a commuting bike.

cheers

[slowster]

https://www.decathlon.co.uk/28-front-hy ... 33890.html. You will also need a connector box: https://www.decathlon.co.uk/connector-c ... 78831.html.

[Cyckelgalen]

Kurbelix.de, a German online shop has a great sortiment of dynamo wheels . Shipping to the UK is a bit steep, 20 euros, but still worth it because their prices are very good and you have endless hub and rim combinations to choose from. The site is only in German but they respond to mails in English. It will take a lot longer tan usual, both communication and delivering orders, due to Covid19 preventive measures.
https://www.kurbelix.de/fahrradteile/fa ... =40&f=1822

[John_S]

Hi Brucey,

Thanks for your message.

So in the value for money stakes you think that this wheel would be a better buy than the Taylor Wheels option?

https://www.decathlon.co.uk/wheel-28-front-dynamo-hybrid--id_8133890.html

If I went for the wheel from Decathlon I was just wondering what extras I'd need to buy so that it was ready to be used?

My wifes bike is not quick release. It just has nuts on the end of the axle in order to secure the wheel into the front fork. In the description of the wheel from Decalthon it says, "Hollow steel axle (quick-release not supplied)".

Therefore would I just need to buy a quick release skewer and then I'd have everything I need to fit the wheel to my wifes bike?

If I need a skewer would something like one of these do?

https://www.sjscycles.co.uk/hub-spares/novatec-qr227f-skewer-front-100mm-black/

https://www.rosebikes.co.uk/mavic-front-wheel-quick-release-axle-284679?product_shape=black&article_size=Standard

There's some quick release skiers on the Decathlon website but it doesn't say what size they are:-

https://www.decathlon.co.uk/road-bike-quick-release-skewers-pair-id_5620714.html

Although something like these might be better from a security perspective:-

https://www.sjscycles.co.uk/hub-spares/systemex-security-allen-key-skewers-black/

or with an allen key:-

https://www.condorcycles.com/products/condor-allen-key-front-skewer?_pos=44&_sid=a266228d4&_ss=r

or compatible with Hexlox security system:-

https://www.condorcycles.com/products/hexlox-security-skewer?_pos=106&_sid=f86a69aae&_ss=r

Thanks for the help.

John

[John_S]

Hi slowster,

Thanks for the tip and for the links including to the connector box.

Hi Cyckelgalen,

Thanks for the message and that website looks like it certainly has plenty of options which is great but it's made me wish that I had learnt German.

Many thanks,

John

[John_S]

Hi again,

Further to the above I just took a look at my wifes bike.

I have got a bit worried about whether or not the Decalthon wheel will be ok or not because on the Decathlon website they don't actually state the Rim size with the ETRTO measurement.

My wifes bike has calliper brakes and the current rim is a Jalco SVX200 double wall 6061 ETRTO 700c 622 x 18c with tyres that are 700 x 28c (28-622).

Therefore if the Decathlon wheel is a hybrid / trekking wheel rim it got me worried that it might end up being a bit wide for my wifes bike given that her bike has calliper brakes?

If the Decathlon rim is too wide am I best off either contacting the Kurbelix company in Germany or going back to Taylor Wheels with either of these options:-

Single Wall rim 28-inch (622-19) for axle nuts with Shimano Nexus DH-C3000-3N hub dynamo at €35
https://www.taylor-wheels.com/28inch-front-wheel-hub-dynamo-dh-c3000-3n-single-wall-rim-622-19-silver

Ryde Zac19 double-wall rim 28-inch (622-19) for axle nuts with Shimano Nexus DH-C3000-3N hub dynamo at €42.90
https://www.taylor-wheels.com/28inch-bike-front-wheel-zac19-hub-dynamo-dh-c3000-3n-622-19-silver

Ryde ZAC2000 double-wall rim 28-inch (622-19) and then it says "thru axle with acorn nuts" (but does anyone really think they mean an actual Thru axle as in the new Thru axle standards?) with Shimano Nexus DH-C3000-3N hub dynamo at €47.90
https://www.taylor-wheels.com/28-inch-bike-front-wheel-zac2000-shimano-dh-c3000-thru-axle-silver

or there is the more expensive wheel at Taylor Wheels but with the better hub:-

Ryde ZAC2000 double-wall rim 28-inch (622-19) with quick release and Shimano DH-3N72 sport hub dynamo at at €84.90 (plus whatever the delivery/shipping costs are from Taylor Wheels and I'm not sure what the cost is yet).
https://www.taylor-wheels.com/28inch-bike-front-wheel-zac2000-with-sport-hub-dynamo-silver


In terms of what the bike is used for it is predominantly used for short trips to the shops, 1 or 2 miles, plus some short family bike rides say 5 to 10 miles so it's not going to used for any long distance trekking or anything like that by a long short.

Thanks for all of the advice.

John

[Brucey]

the 28" decathlon wheel is a 622 rim; I forget which width the rim is, 19mm maybe. It ought to work OK with a 28mm tyre, but won't be a perfect match for a 18c rear rim.

Yes if there is no skewer you will have to buy one to suit. I think the decathlon wheel also doesn't come with the connector plug, which will have to be purchased separately. On the plus side if there is a decathlon store near you there would be no shipping charge on the wheel.

PM me if you are interested in having handbuilt wheel that is a more exact match.

cheers

[slowster]

My wifes bike is not quick release. It just has nuts on the end of the axle in order to secure the wheel into the front fork. In the description of the wheel from Decalthon it says, "Hollow steel axle (quick-release not supplied)".

Therefore would I just need to buy a quick release skewer and then I'd have everything I need to fit the wheel to my wifes bike?

A few people who have bought the Decathlon wheel and posted about it on this forum, have mostly reported that a skewer was supplied (contrary to the website's description), so I would buy the wheel plus the connector box, and wait and see what turned up before buyng a skewer.

NB If it is supplied with a skewer it's likely to be a Shimano one, which will therefore be the enclosed cam type. The open cam QR skewers are an inferior design and I would never buy one (explanation of the difference part way down the page here).

[John_S]

Hi All,

Just as an update to the above I went for the Decalthlon Dynamo wheel becuase the bike will only be used over very short journeys to and from the shops & the station and such like.

The wheel has just arrived and one thing has me a bit concerned is the width of the rim because the clearances on my wifes bike, which has calliper brakes and fairly small clearnance mudguards, are failry tight.

The original rims that my wifes bike came with are Jalco SVX200 double wall 6061 ETRTO 700c 622 x 18c and the tyres that were fitted as new are 700 x 28c (28-622). I'm assuming that this is still pretty much the specification for the current bike being sold by Specialized (my wifes bike being about 8 years old) becuase the Specialized website still lists this under the spec:-

RIMS: SVX200, alloy double-wall, pinned, CNC machined sidewalls, 32h
FRONT TYRE: Specialized Infinity, Flak Jacket, 26TPI, 700x28c

Anyway the Declathlon Dynamo wheel that has arrived has a rim size of 622 x 21c and is this going to be too wide for my wifes bike and the callipper brakes, tight clearances and her 700 x 28c (28-622) tyres?

Also something that I hadn't picked up which is my fault is that the rim is black whereas my wifes current rims are silver. Although in my defence it doesn't actually state on the Decathlon website what colour the rim in and the only photos are from a side profile where from it's not actually easy to tell. Luckily my wife isn't too worried about the asthetics of a front wheel that will be fitted to the bike during the autumn, winter and spring just when it's too dark to ride without lights.

On another note regarding this wheel and for anyone else who is interested in it and wants to know what comes with the wheel mine has come with a quick release skewer.

Thanks for any thoughts because I'm a bit worried that I shouldn't have tried to go so cheap and instead should have spend a bit more on a wheel from Taylor Wheels because at least their website was much clearer on the details of the rim such as size and colour etc.

Thanks,

John

[John_S]

Hi again,

Following my message immediately above I've started trying to research this and I am worried that I've bought the wrong wheel and the rim width is going to be too wide.

I found this written on the subject of rim widths relating to tyre sizes:-

https://bikerumor.com/2016/08/12/tech-story-match-bicycle-tire-width-rim-width-best-results/

In the article it had a couple of charts which I've tried to attach copies of below and they're charts from Schwalbe and Mavic detailing which tyre sizes go with which rims sizes.

Reading the Schwalbe chart it says that a 28mm tyre will work with a maximum wheel rim width of 19c and it says the same on the Mavic chart.

They also both say that for a 21c rim the minimum tyre width is 35mm and looking at my wifes bike with the calliper brakes and the mudguards that are on the bike I haven't a hope of getting a 35mm tyre on there.

Therefore at the moment I'm worried and I think that I've bought a wheel that is going to be no good for my wifes bike. Maybe I shouldn't have gambled with the cheap Decathlon wheel and now I'll be bitten by the old adage of buy cheap buy twice.

Thanks for any thoughts or advice on this.

John

[Brucey]

all you can do is to try the 28mm tyre on the wider rim.

cheers

[John_S]

Hi Brucey,

Thanks for your message below about testing it.

In respect of companies like Schwalbe and Mavic saying that a 21c rim needs a minimum of a 35mm tyre what is the actual issue with a 28mm tyre being used on a 21c rim?

Is it that the tyre doesn't seat very well onto the rim to then inflate and hold air? Is it actually dangerous and could you risk a tyre unseating from the rim whilst you're riding? If there's any hint of it being a risk or dangerous then I don't want to let my wife use the bike set up like that because I'd rather return the wheel to Decathlon and buy a different wheel such as one of the ones from Taylor Wheels.

I'm just thinking about testing it but I was just being a bit hesitant because I didn't want to remove every single bit of packaging from the rim, such as the wrapping as well as the quick release skewer (which is attached through the valve hole in the rim), if all I'm going to end up doing is package it back up and return it to Decathlon.

In terms of whether this wheel and a 28mm tyre will fit into the clearance on my wifes bit what's the most crucial factor? Is it the tyre width or the rim width? Or is it the combinantion of the two because all tyre widths vary a bit from whatever the manufacturer says according to the rim size and what size the tyre actually measures once it's inflated on the rim.

My idea had been to use a wheel from another bike which has a slightly wider tyre on it and see if it would fit onto my wifes bike given the caliiper brakes and the tight mudguard clearance. But if the rim width is more important than the tyre width then this test would be a bit irrelavant.

Thanks,

John

[Brucey]

probably a 28mm tyre will come up about 30mm wide on a wider rim like that. I don't much like using narrow tyres on wide rims but as long as the tyre isn't narrower than the rim itself then it is usually tolerable.

However if you are not sure of this or can't be sure it is going to fit, maybe it is best to return the wheel unused.

cheers

[John_S]

Hi Brucey & everyone,

Thanks for the extra messages.

Further to the previous message although this won't be a true test of whether the new wider rim is going to work but before completely removing all of the packaging from the new rim (just in case I wasnt to send it back to Decathlon) I decided to try something else first.

Now I haven't got another 21c rim on any other bike so I can't test the fit onto my wifes bike using another rim that I already have. But what I did have was a rim with a wider tyre on that I could use as a bit of a test. I appreciate that this won't be a true test, because the rim size is different, but I thought I'd start by seeing if a wider tyre would fit onto the bike.

Therefore I tried to get this rim and tyre combination onto my wifes Globe Daily bike.

A rim of a Matrix rim with ETRTO 622x16 fitted with a Bontrager Select Invert 700x35c (37x622) tyre.

I had to the deflate the tyre to get the wheel through the brake arms and then inflate the tyre again once it was in place. On this subject is that normal for this typre of brake? I'm more used to V-brakes where you can release them to create more clearance to get the wheel & tyre off when you need to take the wheel off the bike. Or when I've been out riding with friends and they've had caliper brakes there has been a sort of quick release on them which you could use to create a wider space to get the wheel off but I couldn't see anything like that with these brakes.


Back to the subject of the wheel when I did get the wheel on and inflate the tyre it didn't spin completely freely but it was begter than I guess it would be. It only rubbed a little on the mudguard and I might be able to adjust the mudgaurd a little tiny bit to create a very small bit of extra clearance.

However given that the rim width (onto which the 700x35c (37x622) tyre) was mounted was only 622x16 was this a completely useless test?

If it wasn't a useless test then it got me to thinking will Declathlon Dynamo wheel that has arrived with the rim size of 622 x 21c maybe work.

I know that Schwalbe and Mavic say a minimum of a 35c tyre for a 22mm rim but if I got close to that with say a 700 x 32c (32-622) then surely that's at least better than fitting a 28c tyre to the rim even if it isn’t as big as 35c?

Lastly if the new 22mm rim is 3mm wider than the current standard stock Jalco 622x18c rim that came with the bike if the new wider rim goes onto the bike I take it I'll have to adjust the calliper brake to account for the wider rim? If I have to do this would I just release a bit of cable tention? Could I do it with the bit that looks like it might be a barrel adjuster?

Firstly I've attached below a couple of photos of the brakes with the original Jalco 622x18c rim and Specialized 700x28c tyres on the bike. Then after this I'll post some photos of the bike with the Matrix rim ETRTO 622x16 with Bontrager Select Invert 700x35c (37x622) tyre fitted.

Thanks again for any thoughts.

John

(below are photos when the original rim and tyre was fitted)