Concept Bikes & Bike Innovation - for better or worse

SmartHalo - turn your bike into a smart bike

Looks like Peugeot are the latest victim of first year art school children playing with their CAD workstations

That bike has been around for three years....

It was a coupled to the design and unveiling of the Peugeot Onyx concept car.

I think it looks fine, pretty conservative for a style study even.

https://www.linkedin.com/pulse/airhub-from-terrain-dynamics-resistance-useful-john-noonan?forceNoSplash=true

^ haha it's super funny that they try to market a wheel that basically applies a brake all the time and then they go on about making it lightweight
http://www.ridemedia.com.au/interviews/the-airhub-effective-training-all-the-time/

EDIT: apparently they're $2,200 too loooooool

Do you really need a new wheel just to get more friction applied?

Do you really need a new wheel just to get more friction applied?

Well, you either need a new $2k onboard resistance device, or you need to ride a little bit faster. On a road bike on the flat, going from 25mph to 27.5mph is about the change you'd have to make to add 100W

I like the idea but I wouldn't buy it. Sometimes it's not practical to ride faster to get to the power levels required. You could probably just use a parachute like runners do, no?

couldn't you just tighten your rear brake up?

And wear out rims and pads? No thanks.

You could wear a giant sombrero?

trailer filled with rocks would work

A dynamo would do the same job and keep your phone charged at the same time

trailer filled with rocks would work

In the olden days, a brick in the saddle bag was the way to slow down anybody who was being a bit too sprightly on the club run. Except on one occasion when they couldn't find a brick but did find an unexploded mortar shell...

Did he win the sprint?

Bits of him did

Does that actually make much difference they got up to a steady speed? Unless the point is trying not to sway the WW2 bomb enough.

Brakes are a blast.

Does that actually make much difference they got up to a steady speed?

It makes a difference to accelerations and climbs, which is where annoying buggers are most annoying. Unless there's a huge difference in ability, it's hard for anybody to ride a following rider off their wheel at a steady speed on the flat.

The "unexploded ordnance" was just a boyish prank which, fortunately, didn't go wrong. In all probability, it was a dummy training round anyway, I don't think there was any live fire exercise in my dad's neck of the woods, but it's a better anecdote if you gloss over that and I'm not sure that anybody would have known the difference.

How many rims and pads would $2,200 buy you?

My front wheel cost £850 ish so depends on Exchange rates but let's just call it 1 set.

Link

In the target markets, people who are too poor to buy fuel are frequently also too poor to buy enough food, i.e. they are just about getting by in terms of calorie intake. If you ask them to provide 0.25kWh per day to power their lights, they would need about (0.25×1000×3600)/(4200×0.2×0.7)≈1500 Calories per day of extra food. The numbers in there are 0.2 for human efficiency and 0.7 for generator efficiency, there's nothing in there for drivetrain or battery/charger/inverter losses, so the real number will be quite a bit higher. If you're eating 1500 Calories a day because that's all you can afford, more than doubling your intake to get some electricity doesn't seem like either a priority project or even a sensible allocation of resources.

1500 Calories is about 1kg of rice, and you need a minimum of 776kJ of fuel to cook it to get your 900kJ of usable output.

Mains electricity costs about 5p for 250Wh in the UK, maybe a bit more in developing countries with lower population density. Best offers I can find on domestic quantities of rice at the moment are a bit under £1/kg here, even by the ton on the Indian wholesale market it only drops to about Rs2100/Qtl for the cheapest grade (called "Government Quality", which tells you all you need to know about Communism) equivalent to about 20p/kg

He would have better put that sort of money into nuclear fusion research.

Are you not mixing up calories of cooked rice by weight with price of dry rice by weight?