Some general brake line questions

[Itchy]

Just curious as I'm about to order some SS lines for the Africa....

But what advantages do each of the configurations confer? .

ie apparently ACU rules need you to have a full length brake hose for each caliper , while most road bikes I've seen happen to have one hose a splitter banjo just before the caliper which then goes into the other caliper...

Surely the second configuration means less weight ? or is there something else at play here? . cost saving measure perhaps?

(though that said I'm thinking of removing a caliper and a disc from the Afrrica to lose some weight off it)

Also other than perhaps aerodynamics why radial master cylinders compared to the traditional cube ones?.


Any thoughts?

Ta
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[sickpup]

Bigger question in your case is whether to buy a swagged un-rebuildable set up or a screw together rebuildable type.

[Wafer_Thin_Ham]

With the second setting you save literally a few grams.

With the top set up you get a more even amount of pressure at each caliper when compared to the second set up. On the second set up the pressure will be higher at the caliper which is visited first.

I don't know why the ACU specificy that any splits in brake lines must occur above the bottom yoke though.
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[Wafer_Thin_Ham]

[Pernig]

[Kickstart]

Hi

Think ACU rules specify that you cannot have a splitter below the bottom yoke. Think you can have a split above the bottom yoke. Think this is just to reduce the chances of a hose being snagged in a race incident.

I can see no reason at all that a pair of full line hoses would offer any different feel than a conventional road bike setup. Whole point of a hydraulic system is that there is equal pressure throughout it.

Suspect the main reason for conventional two line race setup is that they are cheaper than a 3 line setup with a splitter.

Also can see no real reason a 2 line setup should be easier to bleed. And a two line setup has a greater length of hose to expand.

I suspect with radial master cylinders the advantage is less movement of the contact patch between the lever and the piston as the lever moves. While in reality there may be advantages with lever ratios and master cylinder sizes I expect you can get the same with a conventional m/c.

All the best

Keith
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[Wafer_Thin_Ham]