Login required to started new threads

Login required to post replies

Prev Next
SRAM S-900 Aero HRD Disc brake TT levers!
Quote | Reply
It's here! The first hydraulic TT disc brake levers!

https://www.sram.com/...-aero-hrd-disc-brake

SRAM S-900 Aero HRD Disc Brake Product Announcement
For aero disciplines, hydraulic disc brakes can reveal a whole new world of speed savings. Less time slowing down means more time going fast. Better brakes mean faster splits, thanks to confidence-inspiring brake performance. Disc brakes allow optimization of the most critical frontal area of the bike frame – the fork crown/head tube/down tube interface – for aerodynamics. Hydraulic road disc brakes (HRD) also require less hand effort to actuate and provide shorter braking distances and easier changes between wheelsets.
Introducing SRAM S-900 Aero HRD: Unconditional braking for unconditional riders.







Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Last edited by: BryanD: Jul 6, 17 8:06
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
can't help but notice they cropped the 2nd picture to where you can't see how ugly and un-aero that lever must look sticking up above the base bar.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [Sean H] [ In reply to ]
Quote | Reply
Rapp has been testing this for a while. Now that the photos are out, maybe he can show us more.

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [Sean H] [ In reply to ]
Quote | Reply
Sean H wrote:
can't help but notice they cropped the 2nd picture to where you can't see how ugly and un-aero that lever must look sticking up above the base bar.

https://instagram.com/p/BWNNj3NlSzD/


It does stick up above the base bar, but looks like it forms nice bracing for your hands while descending.
Not so nice from an aero standpoint the rest of the time....

Alex Arman

Strava
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [doublea334] [ In reply to ]
Quote | Reply
Haven't we learned yet to wait for the data to make aero claims? Eyeball windtunnels have traditionally not been very good.

Case in point P5x disc brakes in general.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [pyrahna] [ In reply to ]
Quote | Reply
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

This just means we need new bars designed to work with these levers.

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
BryanD wrote:
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

The only way to win the guessing game is to not play....or go out and get the data. You pretty much had a coin toss chance of being right...this time you won.

Personally I believe these brakes are an Aesthetic improvement over the hybrid trp brakes that have been mostly spec'ed up till now.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [pyrahna] [ In reply to ]
Quote | Reply
I never doubted the P5-X would beat the P5. I trust Cervelo's engineering team.

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
BryanD wrote:
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

This just means we need new bars designed to work with these levers.

New frames, new components, new wheels, new bars, etc, etc., etc. Continues to prove the whole point of the disc brake issue, if you ask me.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [kmill23] [ In reply to ]
Quote | Reply
The same thing can be said for cell phones, cars, clothes, etc. Everything changes...and technology moves on. Your current bike will be okay and no one is making you upgrade.

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
it's like a shittier, uglier version of the magura lever!
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
I'll wait until we've settled on a standard until I replace my bike . . . should be what, about 10-15 years or so?
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [kmill23] [ In reply to ]
Quote | Reply
Sooner than that

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
Just awful. Might as well just tape gels to the bullhorns.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
Obviously you may choose to trust whomever you would like, but I find it hard to trust anyone trying to sell me something. Cervelo has had a very good record in the aero field in which to earn your trust, and honestly speaking I trust them significantly more than most. The high profile turn over of a couple key positions had me questioning their commitment to engineering vs. marketing but that fear has been somewhat calmed by the recent independent tests.

I also believe in the "Trust, but verify" motto.
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [pyrahna] [ In reply to ]
Quote | Reply
pyrahna wrote:
Obviously you may choose to trust whomever you would like, but I find it hard to trust anyone trying to sell me something. Cervelo has had a very good record in the aero field in which to earn your trust, and honestly speaking I trust them significantly more than most. The high profile turn over of a couple key positions had me questioning their commitment to engineering vs. marketing but that fear has been somewhat calmed by the recent independent tests.

I also believe in the "Trust, but verify" motto.

Agreed

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [jkhayc] [ In reply to ]
Quote | Reply
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
BryanD wrote:
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

This just means we need new bars designed to work with these levers.


One thing you guys keep forgetting is that one thing Kiley's test did NOT show is how fast a P5X-like bike could be WITHOUT separate hub-mounted braking surfaces...just that the P5X was marginally faster than a bike designed 4-5 years earlier and with considerations to UCI legality.

You also seem to forget that there was ANOTHER non-UCI-legal bike with discs in that test which was slower than both of the Cervelos, despite all of its shaping and surface area :-/

...and yes, those levers are ugly. Makes one wonder how the Magura hydraulic TT levers could be made so relatively "svelte" (Well, folks who don't understand the technology trade-offs might wonder ;-)

http://bikeblather.blogspot.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [Tom A.] [ In reply to ]
Quote | Reply
Tom A. wrote:
BryanD wrote:
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

This just means we need new bars designed to work with these levers.


One thing you guys keep forgetting is that one thing Kiley's test did NOT show is how fast a P5X-like bike could be WITHOUT separate hub-mounted braking surfaces...just that the P5X was marginally faster than a bike designed 4-5 years earlier and with considerations to UCI legality.

You also seem to forget that there was ANOTHER non-UCI-legal bike with discs in that test which was slower than both of the Cervelos, despite all of its shaping and surface area :-/

...and yes, those levers are ugly. Makes one wonder how the Magura hydraulic TT levers could be made so relatively "svelte" (Well, folks who don't understand the technology trade-offs might wonder ;-)

Oh Tom.....

How would we possibly have tested that? Did you want Kiley to just remove the rotors and the calipers? What you are asking for will not ever happen. You know this as an engineer....Cervelo used disc brakes as a design input and never looked back.

Have you called Cervelo yet and told them how wrong they are for making the P5-X? Have you told them how stupid they were for not wasting months or a year designing another bike frame to have rim brakes....then spending even more time in the tunnel to figure it out....then ditching whichever frame was worse....then adding to the cost of the project?

How many more times are we going to do this dance? You have to accept that disc brakes are here. You have to accept that you will not ever convince the industry to change course. You just have to accept it.

Anywho....it will be curious to see Shimano and Magura's offerings later this year.

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
Rather than hydro they would have better spent the time making a standard set of tt brakes with etap buttons built in , don't like there blip solution at all
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
BryanD wrote:
Tom A. wrote:
BryanD wrote:
Exactly. All of that anti-disc brake mess and then Kiley proves everyone wrong.....except me :)

This just means we need new bars designed to work with these levers.


One thing you guys keep forgetting is that one thing Kiley's test did NOT show is how fast a P5X-like bike could be WITHOUT separate hub-mounted braking surfaces...just that the P5X was marginally faster than a bike designed 4-5 years earlier and with considerations to UCI legality.

You also seem to forget that there was ANOTHER non-UCI-legal bike with discs in that test which was slower than both of the Cervelos, despite all of its shaping and surface area :-/

...and yes, those levers are ugly. Makes one wonder how the Magura hydraulic TT levers could be made so relatively "svelte" (Well, folks who don't understand the technology trade-offs might wonder ;-)

Oh Tom.....

How would we possibly have tested that? Did you want Kiley to just remove the rotors and the calipers? What you are asking for will not ever happen. You know this as an engineer....Cervelo used disc brakes as a design input and never looked back.

Have you called Cervelo yet and told them how wrong they are for making the P5-X? Have you told them how stupid they were for not wasting months or a year designing another bike frame to have rim brakes....then spending even more time in the tunnel to figure it out....then ditching whichever frame was worse....then adding to the cost of the project?

How many more times are we going to do this dance? You have to accept that disc brakes are here. You have to accept that you will not ever convince the industry to change course. You just have to accept it.

Anywho....it will be curious to see Shimano and Magura's offerings later this year.

I think chicanery outlined a pretty easy way of testing without brakes in the "peak aero" thread. He's right, you know...regular rim brakes CAN easily be fit into the frame/fork outlines.

I do accept that "disc brakes are here"...hell, they've been "here" on bicycles for MANY decades. It's just that some don't recognize that rim brakes ARE a form of disc brake.

What I DON'T accept is the notion that slapping separate braking discs and extra spokes on a pavement racing bike makes it the fastest it can be. That's just logic and facts. Engineers dealing with physics will understand that ;-)

http://bikeblather.blogspot.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [Tom A.] [ In reply to ]
Quote | Reply
Tom A. wrote:
I think chicanery outlined a pretty easy way of testing without brakes in the "peak aero" thread. He's right, you know...regular rim brakes CAN easily be fit into the frame/fork outlines.

I do accept that "disc brakes are here"...hell, they've been "here" on bicycles for MANY decades. It's just that some don't recognize that rim brakes ARE a form of disc brake.

What I DON'T accept is the notion that slapping separate braking discs and extra spokes on a pavement racing bike makes it the fastest it can be. That's just logic and facts. Engineers dealing with physics will understand that ;-)

Testing without brakes proves nothing except how fast a frame is. You should test the entire system, not just a frame.

Logic, facts, and testing proved that the P5-X was faster in a wind tunnel than a P5. Cervelo's data and Kiley's data on 2 different setups proved that.

I'm sorry I don't deal with mechanical physics. If your statement was true, why has the bike tested faster twice now?

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [neilridley] [ In reply to ]
Quote | Reply
http://www.bikeradar.com/...ro-disc-brake-50322/

Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [BryanD] [ In reply to ]
Quote | Reply
BryanD wrote:
Tom A. wrote:
I think chicanery outlined a pretty easy way of testing without brakes in the "peak aero" thread. He's right, you know...regular rim brakes CAN easily be fit into the frame/fork outlines.

I do accept that "disc brakes are here"...hell, they've been "here" on bicycles for MANY decades. It's just that some don't recognize that rim brakes ARE a form of disc brake.

What I DON'T accept is the notion that slapping separate braking discs and extra spokes on a pavement racing bike makes it the fastest it can be. That's just logic and facts. Engineers dealing with physics will understand that ;-)

Testing without brakes proves nothing except how fast a frame is. You should test the entire system, not just a frame.

Logic, facts, and testing proved that the P5-X was faster in a wind tunnel than a P5. Cervelo's data and Kiley's data on 2 different setups proved that.

I'm sorry I don't deal with mechanical physics. If your statement was true, why has the bike tested faster twice now?

So...you don't understand that the same frame shapes can be had and still have the brakes hidden completely within the shape? If not, then you might want to think about it some more...

No need to be sorry for being a software engineer, but sometimes you might want to leave the hardware opinions to the mechanical engineers ;-)

http://bikeblather.blogspot.com/
Quote Reply
Re: SRAM S-900 Aero HRD Disc brake TT levers! [Tom A.] [ In reply to ]
Quote | Reply
Tom A. wrote:

...and yes, those levers are ugly. Makes one wonder how the Magura hydraulic TT levers could be made so relatively "svelte" (Well, folks who don't understand the technology trade-offs might wonder ;-)

I feel like the Magura calipers houses more hardware, perhaps the cylinder? I'm not super hydro saavy so don't kill me on my lack of engineering smarts :)

The SRAM version seems to have the majority of the hardware in the lever. Though I wonder if it is possible to place it inside the bar instead of outside.

Alex Arman

Strava
Quote Reply

Prev Next