Disc brakes

[Jack Hughes]

Finally, the evidence is starting to appear:

http://www.ukcyclocross.co.uk/articles/ ... ake-injury

[Kevy427]

Finally, the evidence is starting to appear:

http://www.ukcyclocross.co.uk/articles/ ... ake-injury

That's horrendous

[Jack Hughes]

Finally, the evidence is starting to appear:

http://www.ukcyclocross.co.uk/articles/ ... ake-injury

That's horrendous

Apologies, I should have said:

*** WARNING *** Link contains images that some people may find disturbing.

[Worrying Will]

Jack is right about tools. I have cable disks and they are a nightmare to set and get right. They are not as simple as caliper brakes. IanM can vouch for how noise they can be if you get it wrong as they become like a record player ad resin ate really badly, They are inital easier to change but are more difficlut to get perfect and require mainatence.

I love my disc brakes but good they have been a pain to maintain

[Jack Hughes]

It's also things like changing the hydraulic fluid....


£30 for a bleeding kit...

[Jack Hughes]

You're probably going to need:
A Torx driver (Usually T10)
A 4mm Allen Key
A 7 or 8mm Spanner/Wrench
Some Brake Fluid (for type see manufacturer's instructions)
A Small Flat-Headed Screwdriver
A Bleed Pipe
A Plastic Bag
An Elastic Band
Some Old Brake Pads/Cardboard/Wood Spacers
Some Tissue
Rubber/Latex Gloves (needed for use with toxic automotive brake fluid)

Read more at http://www.cycle-route.com/cycle-guides ... E7mSz2k.99

[Kevy427]

You're probably going to need:

A Bleed Pipe
A Plastic Bag
An Elastic Band
Some Tissue
Rubber/Latex Gloves

So you're coming over this weekend with Tritans and Bopo then?

Rubber/Latex Gloves (needed for use with toxic automotive brake fluid)

Nitrile gloves are the best for this as they're impervious to most fluids which is why a lot of the chaps in the motor trade use them when working on brake/fuel lines. Latex will just disintergrate as the slightest sniff of brake fluid

A 7 or 8mm Spanner/wrench

Spanner as we're English. Well most of us are. Apart from the Polish. And the Scottish. And the Yorkshireist who's a witch and probably doesn't have any base language installed

[Bopomofo]

I'm a bit confused about how disc brakes are to blame for injuries. Surely there are far bigger dangers when falling off in a peleton: chain-rings; cassette; everybody behind you; the floor... all that stuff.

I'm sure I'm not the only person who has felt, at some point, that they could have done with a bit more braking power on some occasion although, as the Witch spelled out (thank you, thank you) it is usually downhill in wet and filthy conditions when your wheel rim is covered in flint and sheep-shit. I have found myself on many occasions pulling the brake lever as hard as possible - with correctly maintained brakes and decent pads - and found the bike is just not slowing down. All of my bikes have decent (Ultegra) brakes, by the way.

So I'm a bit interested in disc brakes as I think they can be further improved and could be useful in certain situations: I'm in agreement with the Witch on this.

Appreciating all the comments about aero-ness etc I think a few points remain:

Firstly, has anybody yet seen a really good aero wheel design that completely takes advantage of the fact that the load bearing rim doesn't also have to be a braking surface? Wheel rims have to withstand edge pressure (your weight), expansion (tyre trying to blow the rim apart) and compression (brakes squashing it). I have no idea how you could improve a wheel when the last of those issues is taken away... but I'm pretty sure the marketing department can come up with a bloody good name and a lovely brochure.

Secondly, hydraulic brakes have the advantage of making the leverage ratios completely tuneable. So you don't necessarily need a long brake lever to apply sufficient pressure. Years ago there was a motorbike racer called Mick Doohan, a hero of mine, that bust his legs and knees so many times he was unable to use his left foot to operate the rear brake. His engineers made him a thumb-operated lever on the handlebar and it was so precise that other racers started complaining and then copying the idea.

So with hydraulics you could have tiny brake levers and you could have several of them. Just as Di2 gives the TT / Triathloner the option for gear shifters on the base bars, hydraulics could give you the option of thumb operated brakes on the aero bars. This could be a good thing.

Yes, I've mixed two issues here: discs and hydraulics. Disc brakes can be cable operated, of course. Anybody know of any hydraulic rim brakes?

[kfjatek]

To answer one of my initial questions: http://www.britishtriathlon.org/britain ... update.pdf

Got it from a friendly official. So, disc brakes expressly forbidden in draft-legal races.




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