Disc Brakes on a C59

[PCutter]

One thing that disc brakes will prevent is burping clinchers/loose tubulars caused by hot rims after frequent heavy braking.

Sure, it's not an issue for 99% of riders but I bet for guys like Nibali, Samu, Cancellara and Gilbert they can't come soon enough.

Actually, probably not an issue for Nibali et al, they don't use the brakes that heavily downhill as best i can tell. Andy on the other hand, can't wait.

 

[42x16ss]

Actually, probably not an issue for Nibali et al, they don't use the brakes that heavily downhill as best i can tell. Andy on the other hand, can't wait.

Are you sure about that? The more aggressive you are on a technical descent the harder and more often you will need to brake. Think about it.

The pro's will probably be very keen to try D-brakes out, just wait and see.

 

[Notso Swift]

No, because you have a higher apex speed as well, so your entry can be later AND you exit higher

Good descenders brake later and harder, we spend less time on the brakes which gives them more time to cool

I think most of the credit goes to the USAC for putting gear limits on Jr. racing when their counterparts in the rest of the world are allowed to race normal gears. Why do you think every time a U.S. kid goes to race Kermesses in Belgium to cut their teeth they get shelled all the time? Everybody else is pushing bigger gears, much earlier than us.

... and jet lag.

Both the UK and Australia still rigorously enforce gear restrictions, with a combined total population of about 25% of the US, and AU has a REAL tyranny of distance so I wouldn't be grasping at those straws


I agree that Disks are coming, they may not be needed , but they will come and they will be common
We as consumers dont really have a choice, but most of us dont even know it (not counting people here, of course)

 

[RDV4ROUBAIX]

Both the UK and Australia still rigorously enforce gear restrictions, with a combined total population of about 25% of the US, and AU has a REAL tyranny of distance so I wouldn't be grasping at those straws

Yeah, the recent news of the USAC installing the gear restrictions again wasn't the best example. Didn't realize it was also the case elsewhere, foot in mouth with that one.

I agree that Disks are coming, they may not be needed , but they will come and they will be common
We as consumers dont really have a choice, but most of us dont even know it (not counting people here, of course)

I said the same thing while mountain biking with V-brakes in the early 90's. In the late 90's when I started racing carbon wheels on the road I thought D-brakes would be the savior of their braking and wear shortcomings. It's not a gimmick or marketing scheme as others would have you believe here, there are real quantifiable advantages to them.

 

[richwagmn]

Why the need for hydraulics instead of cables for disc brakes? Cables work fine for all other braking systems. What am I missing?

 

[Gaear Grimsrud]

Why the need for hydraulics instead of cables for disc brakes? Cables work fine for all other braking systems. What am I missing?

Because of the smaller diameter of a disc vs. rim, you need about 5x the force at the brake pad.

 

[k_gibbo]

I don't think disk breaks are for me... More weight + less aerodynamic are not very appealing to me. I do wonder if rims may get lighter with no need for a breaking surface??? If that is the case it may help to balance some aspects of performance.

 

[Gaear Grimsrud]

I don't think disk breaks are for me... More weight + less aerodynamic are not very appealing to me. I do wonder if rims may get lighter with no need for a breaking surface??? If that is the case it may help to balance some aspects of performance.

Except you need to add more spokes to deal with the increased brake force. And a beefier fork.

Disc brakes, should they ever happen, would eliminate radial spokes.

 

[Gaear Grimsrud]

I don't think disk breaks are for me... More weight + less aerodynamic are not very appealing to me. I do wonder if rims may get lighter with no need for a breaking surface??? If that is the case it may help to balance some aspects of performance.

Except you need to add more spokes to deal with the increased brake force. And a beefier fork.

Disc brakes, should they ever happen, would eliminate radial lacing.

 

[Notso Swift]

I don't think disk breaks are for me... More weight + less aerodynamic are not very appealing to me. I do wonder if rims may get lighter with no need for a breaking surface??? If that is the case it may help to balance some aspects of performance.

Rims are significantly lighter, look at MTB rims. Still clinchers and the same weight as road rims, despite being wider and heavier duty

For Pro's the bike needs to meat the UCI minimum, which is easy done regardless. Climbers especially may not accept a 400 gram penalty normally, but since most of them have a 500g weight stuck down the seat post at the BB it is less of an issue!

 

[PCutter]

Are you sure about that? The more aggressive you are on a technical descent the harder and more often you will need to brake. Think about it.

The pro's will probably be very keen to try D-brakes out, just wait and see.

I was actually trying to be facetious. Can get lost in translation in written form

 

[RDV4ROUBAIX]

I don't think disk breaks are for me... More weight + less aerodynamic are not very appealing to me. I do wonder if rims may get lighter with no need for a breaking surface??? If that is the case it may help to balance some aspects of performance.

The weight difference between a rim brake set up and a disk set up is roughly 120g. This includes the caliper, rotor, post mounts, and extra material on the stays and fork. That's nothing!!! It's half of what a Power Tap system adds to the weight of a bike. It's pretty much a wash anyway if you think about it, that 120g you gain in the static weight of parts is deleted by lighter rims, dynamic weight were it really matters. Less aero, how? I'm actually willing to bet that a d-brake set up is actually slightly more aero than a rim brake, but I'm sure the difference is almost not even worth mentioning, like the aero difference from one 58mm deep wheel to the next.

 

[karlboss]

The weight difference between a rim brake set up and a disk set up is roughly 120g. This includes the caliper, rotor, post mounts, and extra material on the stays and fork. That's nothing!!! It's half of what a Power Tap system adds to the weight of a bike. It's pretty much a wash anyway if you think about it, that 120g you gain in the static weight of parts is deleted by lighter rims, dynamic weight were it really matters. Less aero, how? I'm actually willing to bet that a d-brake set up is actually slightly more aero than a rim brake, but I'm sure the difference is almost not even worth mentioning, like the aero difference from one 58mm deep wheel to the next.

I wouldn't be willing to bet anything on aero, aero is fickle, what seems aero may not be when you stick it in a wind tunnel. I could safely assume the differences are very small and with redesign would become nothing.

 

[RDV4ROUBAIX]

I wouldn't be willing to bet anything on aero, aero is fickle, what seems aero may not be when you stick it in a wind tunnel. I could safely assume the differences are very small and with redesign would become nothing.

I would. All the components that make up a disk brake is centered around the axle, slung low, rim brakes sit much higher, and I would bet that the absence of rim brakes would give it a better frontal aerodynamic signature around the fork crown and head tube, slight as it may be. Rider position is the biggest factor, and you're right, everything else is small in comparison.

 

[Boeing]

The SRAM Hydro Road Lever pic leaked looks a lot like the old Mavic Electric hood.

 

[Master50]

The weight difference between a rim brake set up and a disk set up is roughly 120g. This includes the caliper, rotor, post mounts, and extra material on the stays and fork. That's nothing!!! It's half of what a Power Tap system adds to the weight of a bike. It's pretty much a wash anyway if you think about it, that 120g you gain in the static weight of parts is deleted by lighter rims, dynamic weight were it really matters. Less aero, how? I'm actually willing to bet that a d-brake set up is actually slightly more aero than a rim brake, but I'm sure the difference is almost not even worth mentioning, like the aero difference from one 58mm deep wheel to the next.

I am so bad with remembering where I read things. Disks are not aero form some test but I understand that Cervelo is supposed to be doing some aero testing on **** brake systems soon.

 

[usedtobefast]

whatvever...i want one.

 

[Kimono]

now how about ABS?

 

[RDV4ROUBAIX]

I am so bad with remembering where I read things. Disks are not aero form some test but I understand that Cervelo is supposed to be doing some aero testing on **** brake systems soon.

I'd rather have an independent company doing the aero testing. Cervelo's claims on anything to do with cycling holds about as much cache with me as Monsanto telling us what's good to eat.

 

[drawkrb]

i have rode disc brake road bikes since 2007 n1 planet x uncle john used bb5 cable must have done 4000+ miles and only 2 sets pads and by the way i ride in derbyshire.sold this now

n2 bike steel frame bike, made frame my self 853 reynolds bb7 road. rear disc mount between chain and seat stays where it needs to be.built 2009

n3 bike on-one dirty disco built jan this year bb7 mountain bike.

rode suffolk 100 last year on n2,1st time i had rode with large groups,this made me realise how much faster i could stop than those with rim brakes.

think off newtons 3rd law,then look at where disc and rim brakes are mounted.

 

[richwagmn]

i have rode disc brake road bikes since 2007 no1 planet x uncle john used bb5 cable must have done 4000+ miles and only 2 sets pads and by the way i ride in derbyshire.sold this now
no2 bike steel frame bike, made frame my self 853 reynolds bb7 road. rear disc mount between chain and seat stays where it needs to be.built 2009
no3 bike on-one dirty disco built jan this year bb7 mountain bike.
road suffolk 100 last year on no 2 1st time i had road with large groups,this made me realise how much faster i could stop than those with rim brakes.
think off newtons 3rd law,then look at where disc and rim brakes are mounted.

Can anyone decipher this or is it just me?

 

[elapid]

Can anyone decipher this or is it just me?

+1. I think they are saying disc brakes are good on road bikes!

 

[Notso Swift]

Almost unreadable

think off newtons 3rd law,then look at where disc and rim brakes are mounted.

Err, Think of the wheel as a large disk with a greater lever ratio

 

[Boeing]

Whatever indeed I just want one and am especially glad a Company like Colnago took a leap before Specialized or Trek and Giant.

 

[Master50]

I'd rather have an independent company doing the aero testing. Cervelo's claims on anything to do with cycling holds about as much cache with me as Monsanto telling us what's good to eat.

Good point about the marketing. I have read that disk brakes are not aero but they are small too? I have seen a few more shots of the bike and a bit of video too. Still would pick different colours but deep section carbon wheels and that frame with the Campy electric group and I'd be in Italian heaven!

I didn't think I'd need a new bike so soon? Actually I would rather have the CX bike first. I will wait for hydraulic road levers from Campy or Shimano before I try. Thinking Ultegra for CX?