[ianrobo]

Interesting article – http://cyclingtips.com.au/2015/01/tour-of-flanders-to-trial-disc-brakes/

When choosing my new bike I tried a disc brake one and did not like it. Think they are ugly and I am very comfortable with caliber brakes. However they have to sell us something new and this is it.

Once the pro peloton has them then callipers (except for Campag of course) will slowly die out at the top and medium end bikes.

Is it progress ?

Topic

[sergius]

CharlieTwoWheels wrote:Hi

CharlieTwoWheels wrote:

Hi Sergius, Just reading your post and thinking of getting the Rose CDX carbon disc frame with SRAM.
I’d really like to hear your thoughts on the frame. Quality/ride/comfort.
thanks

When it turns up (June!) I’ll be more than happy to provide some feedback. My main annoyance at the moment is that it was entirely unclear until the order was placed that it would be such a long wait. I suspect I’ll get over that when it finally does arrive though.

[Paul J]

Disc breaks is for greek
Disc breaks is for greek weddings, not bicycles.

[CharlieTwoWheels]

Hi Sergius, Just reading your
Hi Sergius, Just reading your post and thinking of getting the Rose CDX carbon disc frame with SRAM.
I’d really like to hear your thoughts on the frame. Quality/ride/comfort.
thanks

[mrmo]

700c wrote:surly_by_name

700c wrote:

surly_by_name wrote:

my advice would be to avoid going too long on wheelsets ’cause in 3 years time you will struggle to buy a frame without 135mm OLD rear end/disc tabs.

not sure I agree – and in any case that assumes people view bike frames as disposable items with a short life. I fully intend to still be on my ti frame in 3 years time and won’t be ‘upgrading’ it simply because the new things is a new brake system or bottom bracket standard, or whatever

Have a look at the MTB market for what may be about to happen. You can get 26″ kit, however considering this is the first year of 650’s from the major manufacturers it is shocking how quickly the good stuff is being dropped. Lots of stuff is only in 650 or 29.

I was looking at Chainreaction the other day for a 9spd rear mech for the mtb, and again not much choice, XT or deore i think. I seem to remember that it was RockShox policy to manufacture spares for nothing over three years. Obviously parts that were common could be used but anything model specific and you started to have problems.

So yes you might want to keep your bike a while but the manufacturers certainly won’t be providing the spares to keep it going any longer than they deem necessary.

Just to be clear spares will be available, just don’t expect the good stuff.

[fukawitribe]

drmatthewhardy wrote:All the

drmatthewhardy wrote:

All the pro-disc people talk as if bikes still had drum brakes like cars did before disc brakes.

No they don’t.

[700c]

surly_by_name wrote: my

surly_by_name wrote:

my advice would be to avoid going too long on wheelsets ’cause in 3 years time you will struggle to buy a frame without 135mm OLD rear end/disc tabs.

not sure I agree – and in any case that assumes people view bike frames as disposable items with a short life. I fully intend to still be on my ti frame in 3 years time and won’t be ‘upgrading’ it simply because the new things is a new brake system or bottom bracket standard, or whatever

[surly_by_name]

In 5 years time Road.cc will
In 5 years time Road.cc will get page impressions by reposting this thread so we can all chuckle that tere was ever any debate about the use of disc brakes. I give you ….. mountain biking. It’s done people. (My bet is that Campag are working with Formula to develop hydro solution. That or they will go the way of Suntour.) Keep riding whatever works best for you/makes you happiest, but my advice would be to avoid going too long on wheelsets ’cause in 3 years time you will struggle to buy a frame without 135mm OLD rear end/disc tabs.

[movingtarget]

LOL, well I am more likely to
LOL, well I am more likely to eat oatmeal in the winter ….

But seriously, there are even wind tunnel tests showing that ~20 degree crosswinds produce significant and consistent drag on disc vs rim braked bikes. The rotor’s a small surface area but when you have 20+ mph swirling gusts or microshears which happen pretty frequently where I ride and in alpine conditions it’ll be noticeable.

http://velonews.competitor.com/2014/12/bikes-and-tech/discs-drag-wind-tunnel-testing-disc-brake-road-bikes_355621

[joemmo]

movingtarget wrote:I must say

movingtarget wrote:

I must say in my personal experience, I have mech disc brakes on my winter (cyclocross) bike and I love them and hate them. It’s very wet in Portland and on rainy days having the added reliable stopping power in traffic and on descents is the main reason why I bought a disc-equipped bike. That said, I really feel the drag on them in crosswinds where at times I’m fighting being pushed into traffic and there is definitely a weight penalty on climbs and group rides. Would I buy them again? Probably since it’s a winter bike but not for the summer road bike.

Since the pros are doing alpine descents, I would think that the crosswind aerodynamics would have a significant impact.

Are you sure it’s just the discs having this crosswind effect and not any of the significantly larger factors at play- like you or what you’re wearing or what you had for breakfast?

[movingtarget]

I must say in my personal
I must say in my personal experience, I have mech disc brakes on my winter (cyclocross) bike and I love them and hate them. It’s very wet in Portland and on rainy days having the added reliable stopping power in traffic and on descents is the main reason why I bought a disc-equipped bike. That said, I really feel the drag on them in crosswinds where at times I’m fighting being pushed into traffic and there is definitely a weight penalty on climbs and group rides. Would I buy them again? Probably since it’s a winter bike but not for the summer road bike.

Since the pros are doing alpine descents, I would think that the crosswind aerodynamics would have a significant impact.

[matthewn5]

All the pro-disc people talk
All the pro-disc people talk as if bikes still had drum brakes like cars did before disc brakes. That was a massive improvement.

Rim brakes are disk brakes. A caliper clamps on a disc. Of a sort, sure, but we are effectively changing a 622mm diameter disc for a 140mm disc. And adding hydraulics, what a faff.

[ducks for cover]

[hampstead_bandit]

@Shep
MTB discs are really
@Shep

MTB discs are really not as problematic as you make out.

Modern brake systems cope well with heat, pad wear for sintered pads is more than adequate when bedded in, if brakes are dosed with cycle disc brake cleaner after bike washing, contaminants are not as issue; I’ve never had to sand pads?

They are also easy to bleed (even avid) if you follow instructions. Yes, I am a professional bike mechanic, but disc brakes are easy to use and maintain.

I’ve ridden disc brakes all over the world including multiple trips to Canada for free ride and downhill at venues like Whistler where a run off Garbanzo through the lower bike park is 25+ minutes of constant descent. Can’t say brakes have been an issue even in pissing rain/mud, and have used same set of pads for 4 week holiday, then still used them back in the UK.

[Cyclist]

Quote:Who in their right mind

Who in their right mind would slam on the brakes at max velocity rather than learn where the limit is beforehand?

Power is not an issue, grip runs out long before, btw.

Just like the born again bikers, who make up the highest death rate for motorcycling, not realising the power available at the lower CC end, Mamils are the equivalent, have not ridden a bike for 25yrs, and only have the previous tech to base their knowledge on. I have seen more mamils at the side of the road bleeding than I have ever done teens/twenties etc. lighter faster more powerful braking, just the same as motorcycles.
I think personally there should be a minimum skill level and fitness test for riding on the road. 10mph is not safe on any road with cars on. IMO…. I will say that again….IMO. Not yours not anyone else’s, mine. B-)

[jacknorell]

Shep73 wrote:jacknorell

Shep73 wrote:

jacknorell wrote:

Shep73 wrote:

You can also go past the braking power/limits of discs, anyone who may have ridden down the radio mast climb near Marlborough at high speed will know that discs have their limits.

Sounds like a descent you’d only do very slowly on rim brakes… just saying.

And Shimano brakes are very easy to bleed, though never had much luck with SRAM / Avid ones…

But the Pro’s hit them at speed, and the point I’m getting at is complacency in riders who may think they have more power than they actually have on fast descents. Shimano are better for bleeding apparently but you have to be patient with them. Some people just don’t get on with it so it’s a job for their LBS.

Apart from being a mistake you’d only do once…

Who in their right mind would slam on the brakes at max velocity rather than learn where the limit is beforehand?

Power is not an issue, grip runs out long before, btw.

[Shep73]

jacknorell wrote:Shep73

jacknorell wrote:

Shep73 wrote:

You can also go past the braking power/limits of discs, anyone who may have ridden down the radio mast climb near Marlborough at high speed will know that discs have their limits.

Sounds like a descent you’d only do very slowly on rim brakes… just saying.

And Shimano brakes are very easy to bleed, though never had much luck with SRAM / Avid ones…

But the Pro’s hit them at speed, and the point I’m getting at is complacency in riders who may think they have more power than they actually have on fast descents. Shimano are better for bleeding apparently but you have to be patient with them. Some people just don’t get on with it so it’s a job for their LBS.

[Author]

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