watch this space (CX disk brakes)
roger_merriman
Posts: 6,165
http://www.bikeradar.com/news/article/uci-allows-disc-brakes-for-cyclo-cross-26660
This is good thing and should make the CX a even better all rounder. brakes being a issue for CX.
and who knows might well mean roadie disks, which has been a long time coming.
This is good thing and should make the CX a even better all rounder. brakes being a issue for CX.
and who knows might well mean roadie disks, which has been a long time coming.
0
Comments
-
Absolutely! Will also mean a much better choice of disc brake compatible forks (this is a serious problem at the moment).David
Engineered Bicycles0 -
Should allow MTBs lol.0
-
The new rules allow a max of 33mm width rubber, ...
That said, MTBs have always been welcome at non-UCI CX races.David
Engineered Bicycles0 -
Genesis vindicated ??0
-
Jay dubbleU wrote:Genesis vindicated ??
The best part of this is that the brakes themselves will get better. Before long, we will have hydraulic brake compatible drop bar sti's.
The wheels will get lighter as well.
Fabulous news.
Of course, I was well ahead of the curve. 8)0 -
I personally don't think we need disc brakes on a road bike, hydraulic brakes though that would be great.x-x-x-x-x-x-x-x
Commuting / Winter rides - Jamis Renegade Expert
Pootling / Offroad - All-City Macho Man Disc
Fast rides Cannondale SuperSix Ultegra0 -
gabriel959 wrote:I personally don't think we need disc brakes on a road bike, hydraulic brakes though that would be great.0
-
i wouldnt want hydraulics on a road bike, think of the weight
:shock:BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
spasypaddy wrote:i wouldnt want hydraulics on a road bike, think of the weight
:shock:0 -
roger merriman wrote:http://www.bikeradar.com/news/article/uci-allows-disc-brakes-for-cyclo-cross-26660and who knows might well mean roadie disks, which has been a long time coming."I spent most of my money on birds, booze and fast cars: the rest of it I just squandered." [George Best]0
-
no. the cable is very thin and light.BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
supersonic wrote:Should allow MTBs lol.0
-
I think you can run CX bikes in XC bikes under UCI rules mind.0
-
spasypaddy wrote:no. the cable is very thin and light.
Mmm... electronic shifting and hydraulic braking....0 -
Brake calipers and rotors tend to add some weight in though. The lightest cable brakes are lighter than the lightest hydros at the minute, including all the paraphenalia to fit them. And a lot lighter on average.0
-
Weight's a red herring. In muddy conditions compared to rim brakes, hydraulic discs probably halve the braking distance (note: I haven't actually done the measurement). Cable discs are better than rim brakes, but not as good as hydraulic discs. This better braking more than makes up for the weight penalty. Looking at cross country mountain bike racers, at the very driest events you may see some rim brakes still knocking about, but as soon as there's mud, everyone's on hydraulic discs. Cyclocross is a winter sport, it's always muddy.0
-
On a related thought, I do wonder how much the UCI has slowed the development of bicycles.
One thing that got me thinking is that a recumbent *tricycle* holds the Lands End to John O Groat's cycling record. Shouldn't recumbent bicycles be faster still?0 -
whyamihere wrote:Weight's a red herring. In muddy conditions compared to rim brakes, hydraulic discs probably halve the braking distance (note: I haven't actually done the measurement). Cable discs are better than rim brakes, but not as good as hydraulic discs. This better braking more than makes up for the weight penalty. Looking at cross country mountain bike racers, at the very driest events you may see some rim brakes still knocking about, but as soon as there's mud, everyone's on hydraulic discs. Cyclocross is a winter sport, it's always muddy.
Not to mention how much having your brakes full of mud slows you down.0 -
supersonic wrote:Brake calipers and rotors tend to add some weight in though. The lightest cable brakes are lighter than the lightest hydros at the minute, including all the paraphenalia to fit them. And a lot lighter on average.
A melon is, I believe, heavier than a banana.
Discs would have advantages - lower inertia wheels - move the braking surface from the rim to the hub means a lighter rim and weight closer to the axis of rotation.
I don't think it will happen for a long time in road bikes, but development for cross will be a first step.0 -
whyamihere wrote:Weight's a red herring. In muddy conditions compared to rim brakes, hydraulic discs
Probably not far from the truth. Having raced my proto in the London CX champs early this year, I was hugely impressed with the improvement in braking, but more important the improved level of control, from discs compared to canti's in muddy race conditions.
As for hydraulics v cable. I think cable will stay for the forseeable. It works well and the performance improvement argument isn't really there yet (for cross anyways).
I think the biggest improvements will be in lighter, disc specific wheels, particularly rims - tho' I think lighter CX specific hubs may pop up too. I think there will be a resurgence of availability of 140mm rear discs. The range of road-specific calipers will increase. And the range of forks available will improve - at the moment there are very few options.David
Engineered Bicycles0 -
Always Tyred wrote:spasypaddy wrote:no. the cable is very thin and light.
Mmm... electronic shifting and hydraulic braking....BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
can't wait, as this should encourage proper "trickle down" road disc development that should pay dividends for winter commuters and tourers.
I would love mechanical discs on my hack bikes, at least on the front, for bad weather.
This winter, with the extended slush and snow periods, has really exposed the weaknesses of rim braking.Commute: Langster -Singlecross - Brompton S2-LX
Road: 95 Trek 5500 -Look 695 Aerolight eTap - Boardman TTe eTap
Offroad: Pace RC200 - Dawes Kickback 2 tandem - Tricross - Boardman CXR9.8 - Ridley x-fire0 -
spasypaddy wrote:Always Tyred wrote:spasypaddy wrote:no. the cable is very thin and light.
Mmm... electronic shifting and hydraulic braking....
Hydraulic fluid is lower density than metal and you wouldn't need a much greater cross sectional area of hydraulic fluid.
There's a general technical prejudice against the idea, but if optimised to the same extent as current road mechanical systems, I've not yet heard a good reason why they wouldn't be superior in every way.
The only like for like comparison currently available is mountain bike mechanical disc systems vs. mountain bike hydraulic systems. Which is heavier?0 -
i cant find anywhere that says how much a disc brake with cable or a disc brake with fluid weighs. (well not anywhere that states that the weight is including cable/fluid). It stands to reason that the stated weight for a disc brake using fluid will be lighter than the stated weight for a disc brake using cable because the brake using fluid is a higher end brake. I am doubtful of the stated weight including the fluid/cable.BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
spasypaddy wrote:i cant find anywhere that says how much a disc brake with cable or a disc brake with fluid weighs. (well not anywhere that states that the weight is including cable/fluid). It stands to reason that the stated weight for a disc brake using fluid will be lighter than the stated weight for a disc brake using cable because the brake using fluid is a higher end brake. I am doubtful of the stated weight including the fluid/cable.0
-
because i dont want to have to spend the money to upgrade
therefore im going to blindly believe that its heavier (until proved otherwise)BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
spasypaddy wrote:i cant find anywhere that says how much a disc brake with cable or a disc brake with fluid weighs. (well not anywhere that states that the weight is including cable/fluid). It stands to reason that the stated weight for a disc brake using fluid will be lighter than the stated weight for a disc brake using cable because the brake using fluid is a higher end brake. I am doubtful of the stated weight including the fluid/cable.David
Engineered Bicycles0 -
Roastie wrote:The BB7 has a lot of excess that could be shaved ... Bring on SRAM red BB disc calipers .
That and the likely development of a lot of good CX disc specific forks (as you have already said) is very good news. I still get a moment of terror when pulling on the brake lever of a rim braked bike in the wet and get the initial 0 response.
Mike0 -
would a carbon fork work with a disc brake or would it sheer off?BMC TM01 - FCN 0
Look 695 (Geared) - FCN 1
Bowman Palace:R - FCN 1
Cannondale CAAD 9 - FCN 2
Premier (CX) - FCN 6
Premier (fixed/SS) - FCN30 -
spasypaddy wrote:would a carbon fork work with a disc brake or would it sheer off?
It isn't quite as simple as just molding on a mount though as you do need to adjust this carbon layup to resist the braking forces on the fork leg. This is why the UCI making them legal is good news as it means that the CX fork manufacturers will spend the necessary research money to make them. Up until now the demand (and therefore the development money available) is not very high as the market is restricted to a fairly small group.
Mike0