Search found 108 matches

by Peter W
15 Aug 2018, 6:49pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Ah yes, that age old plea for simplicity in all things - we don't need bikes laden with technology! I was reminded of a conversation with an elderly work colleague ( more a lecture by him) in the early 1960's. He drove a Ford Consul car and was railing at the fact that car manufacturers were forever...
by Peter W
14 Aug 2018, 8:17pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

I think that we are at cross purposes Amediasterix. Disc brakes DO meet 'my' average situation by intentional design and build, on THAT basis. All I am suggesting is that users are now 'pushing' that a bit harder, which is probably beyond what the manufacturers envisioned. (i,e. the average, plus a ...
by Peter W
14 Aug 2018, 4:29pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

What standard should be set? An average weight rider, on an average weight solo bike,descending an average long steep twisty hill, involving fairly heavy braking over a longish while. Wasn't something like that already a design brief in putting hydraulic disc brakes on road bikes? Don't manufacturer...
by Peter W
14 Aug 2018, 8:34am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Of course bike brakes are not currently designed to to continue working when overheated Bob. That's precisely the point I'm making! They SHOULD be required to do so, on safety grounds. (Long steep descents at speed, with heavy braking .) The technology clearly exists to meet that need, so why isn't ...
by Peter W
14 Aug 2018, 7:55am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

There still hasn't been a convincing explanation of how Formula 1 braking systems can continue to work reliably (non fade or fail) while the discs are glowing red hot. Stating that cooling ducts, and high speed air flow misses the obvious point that neither PREVENTS the discs, and presumably the pad...
by Peter W
13 Aug 2018, 10:37am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

It seems that the claim of disc braked road bikes being heavier than rim braked road bikes has passed into folklore, for ever more to be cited by those who oppose them. I have one of each, from the same manufacturer, and of the same LINE. (Spesh Roubaix - old rim braked - new disc braked.) The claim...
by Peter W
12 Aug 2018, 9:23pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Brucey wrote - 'A synthetic version of DOT fluid is used.' (Formula 1.) Presumably that fluid is more 'boil proof', and fade proof, which would be of great advantage on a hydraulic disc braked system road bike. I take it that said fluid is prohibitively expensive, requiring special components (seals...
by Peter W
12 Aug 2018, 6:29pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

What brake fluid do Formula 1 cars use?

Why do their hydraulic brakes not suddenly fail from overheating when their carbon fibre discs glow absolutely red hot during successive multi G force slowings from very silly high speed?
by Peter W
12 Aug 2018, 9:01am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

All this heat barrier science reminds me of George Gamow's famous book of Mr. Tompkin blundering through the bizarre relativity effects, if the speed of light was only 20 m.p.h.. If the speed of light was only that fast we cyclists could join in the fun of warping time by our furious pedalling while...
by Peter W
10 Aug 2018, 6:33pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

It's surprising what you learn from wandering threads like this. I'm all for it! Thanks for all the info. But to brakes - I was blissfully unaware that the Ice Tech rotors on road bikes were composites. It was Brucey who mentioned the minimum allowable wear limit of 1.5 mm. It was only after that I ...
by Peter W
10 Aug 2018, 7:53am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

While it is true (I would think) that no cyclist, however small their wheels, descends quickly enough to generate air friction heat, I can't help wondering what colour rims, or even bike, would best aid heat dissipation? (After all, in cowboy days the baddies wore black hats and we all know how hot ...
by Peter W
6 Aug 2018, 6:54am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Just to maintain a semblance of balance - it has also been known for rim brakes to get hot enough to explode tyres, and break peoples necks, on long fast descents. And in lousy wet grotty winter road conditions, non properly acting delayed action rim brakes are even less ideal than discs, for commut...
by Peter W
4 Aug 2018, 5:47pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Slowster makes a lot of sense about the wishes of those of us who are mountain bikers. Kind of 'pushing the envelope' so to speak, while being accustomed to very capable hydraulics along with good suspension, isn't just an imaginary gain, so it is not surprising that for many, the same braking perfo...
by Peter W
4 Aug 2018, 10:37am
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Brucey. I've thought through as accurately as I can the manner in which I've done emergency stops (bikes and cars) in which there is no time for thought, just instinctive brain wired in from experience action. What I 'think' happens in my case, is that I certainly snatch grab at the brakes BUT pract...
by Peter W
3 Aug 2018, 2:03pm
Forum: Does anyone know … ?
Topic: Why have disc brakes become so popular?
Replies: 494
Views: 16522

Re: Why have disc brakes become so popular?

Landriver. (Quote.) 'don't see your argument existing anywhere but in theory.' (With regard to panic freezing, and none reaction.) A clear example, just one of many I could relate! On a three lane (inherently dangerous, and since done away with) section of the old A 1 approaching Newcastle (late 195...