Oops

[anonymous-user]

I never heard of a bike you can't free wheel. A fixie? WTF kind of a55hole rides a bike you can't stop. Muppet.

[Mr Will]

Finlandia said:

There are plenty of bikes with only rear brakes on the pedals in Finland and Sweden, most new bikes have front brakes too, but not all.

They should be illegal. You can't stop a bike safely with only a rear brake.

[Mr Will]

Bodo said:

Most civilised countries ask for two seperate brakes in vehicles that participate in traffic. For cars, this usually is a brake system with two circuits (NOT the handbrake).

Engine braking is legally not considered a brake - the same is true for a fixed-gear bike. Definition: A brake is a mechanical device which inhibits motion, slowing or stopping a moving object or preventing its motion.

Incorrect, two separate circuits is not enough. What if the master cylinder or pedal fails?. That's why no handbrake fails the MOT. Engine braking is not considered a brake but a fixed gear bike is (in the UK at least).

[Finlandia]

Mr Will said:

Finlandia said:

There are plenty of bikes with only rear brakes on the pedals in Finland and Sweden, most new bikes have front brakes too, but not all.

They should be illegal. You can't stop a bike safely with only a rear brake.

But you can with a fixie?

[Mr Will]

Finlandia said:

Mr Will said:

Finlandia said:

There are plenty of bikes with only rear brakes on the pedals in Finland and Sweden, most new bikes have front brakes too, but not all.

They should be illegal. You can't stop a bike safely with only a rear brake.

But you can with a fixie?

No; which is why they need a brake to be road legal.

[Finlandia]

Mr Will said:

Finlandia said:

Mr Will said:

Finlandia said:

There are plenty of bikes with only rear brakes on the pedals in Finland and Sweden, most new bikes have front brakes too, but not all.

They should be illegal. You can't stop a bike safely with only a rear brake.

But you can with a fixie?

No; which is why they need a brake to be road legal.

Which is what the pedal brake bikes also have, one brake.

[Mr Will]

Finlandia said:

Which is what the pedal brake bikes also have, one brake.

So what's the backup for when that fails? Every road vehicle should have TWO braking devices. One of those may be a fixed wheel.

[Finlandia]

Mr Will said:

Incorrect, two separate circuits is not enough. What if the master cylinder or pedal fails?. That's why no handbrake fails the MOT. Engine braking is not considered a brake but a fixed gear bike is (in the UK at least).

A fixed gear bike is just that, engine braking, the cyclist retarding the pedals to his best capability, exactly like a driver who is using a lower gear to lower the speed, neither are braking, but both are slowing down.

Very odd law that sees a fixed gear as a brake.

[Finlandia]

Mr Will said:

Finlandia said:

Which is what the pedal brake bikes also have, one brake.

So what's the backup for when that fails? Every road vehicle should have TWO braking devices. One of those may be a fixed wheel.

You put both your feet down.

[berlintaxi]

No brakes on a unicycle either, hope the rider will be OK.

http://www.dailymail.co.uk/news/article-3102358/Am...

[Bodo]

Mr Will said:

Bodo said:

Most civilised countries ask for two seperate brakes in vehicles that participate in traffic. For cars, this usually is a brake system with two circuits (NOT the handbrake).

Engine braking is legally not considered a brake - the same is true for a fixed-gear bike. Definition: A brake is a mechanical device which inhibits motion, slowing or stopping a moving object or preventing its motion.

Incorrect, two separate circuits is not enough. What if the master cylinder or pedal fails?. That's why no handbrake fails the MOT. Engine braking is not considered a brake but a fixed gear bike is (in the UK at least).

How do you think would you get a redundant brake into a car beside the hydraulic brake?
Two circuit-systems are enough in Germany, and mandatory since 1967: http://de.wikipedia.org/wiki/Bremse
The parking brake is NOT considered to act as a backup. Is that the case in the UK? How would that work with an electric parking brake?

[TKF]

Mr Will said:

The leg injury thing is nonsense. It'll throw you off the bike before it does any damage to your legs.

Have you tried to stop pedalling a fixed gear bike at 20mph?

[Mr Will]

Bodo said:

How do you think would you get a redundant brake into a car beside the hydraulic brake?
Two circuit-systems are enough in Germany, and mandatory since 1967: http://de.wikipedia.org/wiki/Bremse
The parking brake is NOT considered to act as a backup. Is that the case in the UK? How would that work with an electric parking brake?

Cable operated handbrake - as fitted to 99% of cars on the road. I believe electronic handbrakes are separate from the hydraulic system as well. Perhaps German laws are different but a dual-circuit system still offers plenty of single points of failure.

If it's only a parking brake then why do automatic cars have one?

[irocfan]

berlintaxi said:

No brakes on a unicycle either, hope the rider will be OK.

http://www.dailymail.co.uk/news/article-3102358/Am...

like you hope that cyclist will be ok but.... who the fk thinks that riding a unicycle on a main road (any public road TBH) is a good idea?

[Mr Will]

Finlandia said:

Mr Will said:

Incorrect, two separate circuits is not enough. What if the master cylinder or pedal fails?. That's why no handbrake fails the MOT. Engine braking is not considered a brake but a fixed gear bike is (in the UK at least).

A fixed gear bike is just that, engine braking, the cyclist retarding the pedals to his best capability, exactly like a driver who is using a lower gear to lower the speed, neither are braking, but both are slowing down.

Very odd law that sees a fixed gear as a brake.

A fixed gear bicycle can supply enough force to lock the rear wheel and it can completely stop the vehicle. Engine braking can do neither of these things.

[Mr Will]

Finlandia said:

Mr Will said:

Finlandia said:

Which is what the pedal brake bikes also have, one brake.

So what's the backup for when that fails? Every road vehicle should have TWO braking devices. One of those may be a fixed wheel.

You put both your feet down.

So are you saying bikes with only one brake are safe enough, or not? This one had one and a half and he still smacked in to the side of a bus.

[PoleDriver]

Mr Will said:

If it's only a parking brake then why do automatic cars have one?

Not sure if it's the same with modern slush boxes but with older ones if you stop on a steep hill and put it in park without the handbrake you would have a big problem taking it out of park!

[Mojocvh]

TKF said:

Mr Will said:

The leg injury thing is nonsense. It'll throw you off the bike before it does any damage to your legs.

Have you tried to stop pedalling a fixed gear bike at 20mph?

So are you saying they shouldn't be on the road then?

[Bodo]

Mr Will said:

Bodo said:

How do you think would you get a redundant brake into a car beside the hydraulic brake?
Two circuit-systems are enough in Germany, and mandatory since 1967: http://de.wikipedia.org/wiki/Bremse
The parking brake is NOT considered to act as a backup. Is that the case in the UK? How would that work with an electric parking brake?

Cable operated handbrake - as fitted to 99% of cars on the road. I believe electronic handbrakes are separate from the hydraulic system as well. Perhaps German laws are different but a dual-circuit system still offers plenty of single points of failure.

If it's only a parking brake then why do automatic cars have one?

Sorry if my question was unclear, and I'm also a bit confused by your reply.
Where does the automatic transmission come from, and what relevance does it have to brakes?

I didn't think that electric parking brakes are part of the hydraulic system. It's an interesting thought, but technologically, that doesn't make sense.

Let me simplify my question: What is the second brake, that is required by UK law, in a vehicle that has an electronic parking brake?

[Finlandia]

Mr Will said:

A fixed gear bicycle can supply enough force to lock the rear wheel and it can completely stop the vehicle. Engine braking can do neither of these things.

Evidently not, as seen in the video.

Mr Will said:

So are you saying bikes with only one brake are safe enough, or not? This one had one and a half and he still smacked in to the side of a bus.

They are safe enough if you can put your feet down to stop the bike, which you can't on a fixed gear bike as the pedals would be smashing your legs to pieces.