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Re: University Project (Charging Rucksack Concept)

24 April 2015 - 6:16pm
I sometimes carry a laptop in a pannier. I put it inside a laptop bag, in the pannier. No problems (so far).

I don't wear rucksacks on bikes.

The idea sounds useful for hill-walkers, especially on a walking/camping tour with limited opportunity for charging gadgets.

Re: University Project (Charging Rucksack Concept)

24 April 2015 - 5:55pm
The mention of laptops is significant. I don't know how vibration-proof modern laptops are (as opposed to tablets or similar, which I assume are immune from anything) - but I wouldn't trust mine in a pannier. So if I have to carry one (very rarely), into the rucksack it goes. I think it all depends on how heavy your rucksack load is. A small rucksack, lightly laden, over a moderate distance, isn't usually a problem.

Re: You either have or you don't.

24 April 2015 - 5:54pm
He was probably a Cat 1 racer who just dresses like that to go and have some 'sport' with us unsuspecting mortals

Re: University Project (Charging Rucksack Concept)

24 April 2015 - 5:51pm
Most cyclists hate ruck sacks unless they are for very short journeys, or you are off road where putting stuff in panniers would compromise handling. Ruck sacks can give you a sweaty back and make your shoulders ache. If you are just thinking about short journeys, where ruck sacks make more sense, then your idea of charging it as you ride doesn't work so well.

Sorry, but it's not an idea that appeals to me, thus I wouldn't buy such a product.

Re: First Sportive in June

24 April 2015 - 5:45pm
An account from a cycletourist on his second sportive (with link to the first one) may be of some interest to the OP:

http://eastyorkshirectc.org.uk/big-g-cy ... 2013-100km

University Project (Charging Rucksack Concept)

24 April 2015 - 5:14pm
Hello,
I am currently studying mechanical engineering at university and for one of our group projects we have to design a biking accessory. Our group has come up with the idea of a rucksack with compartments for laptops and smartphones and other electronic devices. The bag would be attached to a dynamo on the bike so that it is able to charge electronic devices as you cycle to work or when on a road trip etc.

We need to do some market research and any feed back on this idea would be very much appreciated. Does this product appeal to you? Can you see a place for it in the marketplace? How much would you be willing to pay for it?
Thank you!

Re: You either have or you don't.

24 April 2015 - 4:55pm
Always watch out for the old guy on a steel bike. Cos much of the time he can drop you in a second if he so desires.

Re: You either have or you don't.

24 April 2015 - 4:51pm
There are people who ride faster than me, there are people who ride slower than me. Thus it ever was and thus I hope it ever will be.

Re: You either have or you don't.

24 April 2015 - 4:10pm
When I used to commute near 40 miles a day I was able to have lots of fun with roadies even when on my MTB.
Can't do that these days, my weekly mileage is probably only 40 miles.

IMO it's all to do with time in the saddle.
(Similarly last year I upped the mileage I run and got my 10k time down to 38 mins and half marathon to 1:25. One of the guys at the club said "for an old, fat bloke you're bloody quick!" (I'm 54 and 13 stone)).

You either have or you don't.

24 April 2015 - 3:45pm
I went out for a ride this morning over the South Downs and in my usual manner struggled up the hills. But on one of those hills I suddenly become aware of another cyclist about to overtake me. As I spotted him I noticed that he looked a bit older than me, he was not wearing cycling clothing but rather jogging bottoms and top and was riding a really old mountain bike. I only mention any of that to give you an image of the event and my real point is what a great cyclist he was.
As he overtook me on the hill at some speed I was standing up on my pedals and he was sat just twiddling away on his.
With a cheery " morning " as he passed me he disappeared up the road and at one point I thought I had caught up with him but on the next hill he just twiddled away and was gone again.

I was really hoping that he was going to stop at the same café as me as I was going to buy him a drink but sadly he didn't. If he had I was going to of cause probe him as to how he makes it look so easy and hopefully get some tips on how I can do the same.

Its probably the only time I ever wished I had been wearing a helmet cam because I could then have posted video of the event.

Anyone passing me when I am out on my bike is not an unusual event but its usually those younger wearing all the gear and on an expensive bike so its great to know that you don't need all of that because you've either got it or you haven't.

Re: Pannier question

24 April 2015 - 1:20pm
This discussion is as old as the hills. For what it's worth I think the weight is best carried by the bike, not slung on your shoulders making your back sweaty. Your legs push the same weight along, whichever way you do it. If you stand on the pedals, yes, with a bag on your back you can bring down more weight on the down stroke. But you also have to lift up the extra weight in the first place. But perhaps a slightly different cycling action might be required, though, relying less on a powerful out of the saddle push to get you going.

Re: Pannier question

24 April 2015 - 1:03pm
Isn't it logical that if you put more weight on the bike it will take more effort to get it going from standstill? Yes I know that the same weight is there if you had the weight on your back instead, but for the initial push off it does seem to make sense that an unladen bike will feel and behave in a more lively manner than a laden one.

Despite this I'm a firm fan of letting the bike bear the weight of course - tis just so much more comfortable apart from anything else.

I'm no physicist... Someone should do a proper experiment (they probably already have).

Re: Pannier question

24 April 2015 - 12:19pm
Is it to do with you and the bike not being "at one" as you move off? If you start to accelerate the bike before your body moves, a light bike - i.e. no luggage, will accelerate faster until your body starts to move as well.

The cycling tuition I received when I was young was that you should never carry anything on your back when riding - to minimise strains. I think that holds true for cycling long distances. More recently I've also been sharing the weight on the bike - putting the weight up front on low rider panniers.

Re: Pannier question

24 April 2015 - 12:12pm
I have the panniers positioned right at the back of the pannier rack so they're quite a way from the brakes so can't see it being that. Once the bike's up to speed, it takes the same amount of effort to keep moving.

I'm wondering whether when my laptop is on the rack it is a dead weight whilst when it's on my back then it's moving with me - if you see what I mean.

Re: fewer motorists fined for mobile use

24 April 2015 - 9:05am
kwackers wrote:I saw that. Good on them! I'm fed up with folk who think they can park wherever they like with impunity and then whine like a girl when they get a ticket.
The reality is that whilst not long ago parking companies were extracting the urine it's gone too far the other way now.
I take your point but is the sexist comparison necessary?

Re: Pannier question

24 April 2015 - 7:17am
Check panniers are not affecting the rear brake, either by pushing the cable run out of shape or actually pressing on the brake arms themselves (if it's a v- brake).

Re: Pannier question

24 April 2015 - 7:15am
Possibly that your standing on the pedals, and so when you had the weight on you it was 'helping' in the down phase, but not too noticeable in the 'lift'?

Re: Pannier question

24 April 2015 - 7:07am
Not that I can recall from my experience. I take it nothing is rubbing anywhere and that your tyres are pumped up and your bearings are in good condition?

Re: Sad news from Nottingham

24 April 2015 - 12:00am
TrevA wrote:The collision may have occured on the Toucan crossing (pure speculation).

You're in a hole.
Stop digging!

Re: fewer motorists fined for mobile use

23 April 2015 - 11:13pm
iviehof, I have been ticketed for obstruction when parking when I wasn't, and could prove it - the police action was part of some intimidation against a particular group, whose activities I was just there to photograph. The police wouldn't even accept my complaint about it.

However, I still think there ought to be automatic serious penalties when it is proven that someone used a mobile phone whilst driving.

I've had a copper lie to my face about where his own car was parked, and then when we both looked round, there it was. Not where he had said it was. He still wouldn't back down. Undoubtedly some police officers are lying toads, but phone records are definitive.

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