Shimano unveils Tiagra hydraulic disc brakes

The _Kaner wrote:

BRIFTER...

I think you did more damage right there than myxamatosis...

adamthekiwi wrote:

Does it come in a triple? 105 left hydraulic brifter doesn't...

Every time you use this word, God kills a fluffy bunny wabbit

surly_by_name wrote:

How about a flat mount to IS adapter?

No, no such thing exists to fit flat mount to your IS frame, your a generation of standards behind.

FYI for anyone else asking about adaptors, the convention is to state 'CALIPER to FRAME/FORK' mount, at least thats how the vast majority of adpators are listed.  But when talking about sizes its usually the other way around, i.e. 160 to 180 adaptor (increase).

euanlindsay wrote:

Shimano make flatmount to post mount adaptors.

I don't think so. They make adapters to install post-mount brakes onto a flat-mount frame, not the other way 'round.

I made the same mistaken assumption in the past.

Initialised wrote:

So for an older bike with post mount fittings and a 10 speed drivetrain buy the brifters and your choice of mineral oil (not SRAM) calipers as the Tiagra Flat Mount will not fit.

Indeed. That's my frustration as well. My bike's a Giant TCX SLR 2 with 10-speed 105 5700 and post-mount hardpoints on the frame.

The fork is also post-mount, and it can be replaced for a Flat Mount one, but really I wouldn't want to swap it out while it's still perfectly functional.

I'm wondering if there's going to be some sort of market for aftermarket adapters to install Flat Mount brake calipers onto a post-mount frame and fork?

Initialised wrote:

Flat Mount looks like a nice way of making them non-interchangable with things like four pot Saint or Zee and removing backward compatibility because you cant adapt a Flat Mount brake to a post mount frame - it works the other way and shimano fluid is the same.

It also looks like the Sora Mechanical caliper has been designed so that Shimano's finned pads wont fit, while the Tiagra/105 will accomodate them.

So for an older bike with post mount fittings and a 10 speed drivetrain buy the brifters and your choice of mineral oil (not SRAM) calipers as the Tiagra Flat Mount will not fit.

Bike company designs new product for new bikes that doesnt fit old bikes shocker. 

But as you say calipers are interchangeable with the levers so just buy the levers and whatever caliper fits.  You can buy levers and calipers separate anyway.

Im confused why you'd want to fit finned pads to a mechanical brake though, no fluid to heat so not required.

STATO]</p>

<p>[quote=Initialised wrote:

Im confused why you'd want to fit finned pads to a mechanical brake though, no fluid to heat so not required.

Do the finned pads dissipate heat from the fluid?  The contact between the pad and the fluid must be very minimal through the brake caliper pot.

I bet it does a better job of dissipating the heat from the rotor and pad directly.

newtonuk]</p>

<p>[quote=STATO wrote:

Initialised wrote:

Im confused why you'd want to fit finned pads to a mechanical brake though, no fluid to heat so not required.

 

Do the finned pads dissipate heat from the fluid?  The contact between the pad and the fluid must be very minimal through the brake caliper pot.

 

I bet it does a better job of dissipating the heat from the rotor and pad directly.

Finned pads were developed to dump heat as any heat build up in your pads passes through the pad backing into the piston and hence heats the fluid, causing the brake to become unreliable and potentially fail, thats why shimano (and others) use fancy ceramic pistons too. Anyone who ever ran old hope mtb discs in the Alps will know that you can suddenly have no brake if they get too hot. 

Yes heat build up can cause an issue the mechanical friction in the pad/rotor interface but not to the same extent or lack of braking that losing hydraulic pressure does. Thats why these products only became a 'thing' once road bikes started using hydraulic discs. Shimano does state you can run the RT81 ice-tech rotors though so obviously looking out for us brake draggers on their next alpine sportive .