Increased braking performance - very desirable in unpredictable situations Eg.The potential advantages of a hydraulic road disc set-up: Most 2015 road disc bikes utilise a conventional quick release skewer at the rear as the frame offers increased strength and stiffness compared to the fork, which needs to withstand greater braking forces. And it's in the axles that will see most of the change, with most manufacturers opting for either a front or twin thru axle system.
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Our feeling is that as long as you view the frameset plus axle as one component, you should live easier.
We're talking about a system that hasn't really changed for over 80 years and early adopters will be without easy supply of replacement parts until the industry creates a standard for road discs. The biggest challenge facing bike and component manufacturers who are aiming to sell these bikes is TRADITION. As we have written in this feature there are a number of knock-on effects of moving over to a road disc set-up, all of which are either progressional advances in bicycle design or which are needed to accommodate the increased braking forces - rotational and twisting / torsional - that are active in a hydraulic disc set-up. Well, there is nothing wrong per se, but it is a long past it's bed time and current hydraulic brake technology combined with advances in frame, fork and axle design make the argument for disc road bikes a compelling one. What is wrong with the traditional caliper brake set-up? Most endurance / sportive bikes have a chainstay length closer to, or in excess of, the recommended Shimano minimum of 415mm. With the short chainstays of a road race bike, typically around 400mm, chain line issues resulting in poor shifting can occur. But the chainset will be staying in the same place, so extra bending strain will be placed on the chain with the increased width at the gearing extremities - 1st gear and top gear. The new breed of disc road bikes will be adopting the 135mm standard to accept the disc rotor on the non-drive side. Rear frame spacing on modern road bikes with a caliper set up is 130mm and that can accept the latest 11-speed cassettes. Reason two is less obvious but more technical. This ruling will probably coincide with Campagnolo releasing their own hydraulic groupset at some point in 2015. Riders of endurance and sportive models are unlikely to be reading the UCI rule book, which currently prohibits disc brakes on World Tour races and events, although it is widely accepted that discs will be introduced for the 2016 road season. The answer is a double sided but one which is easily understood. Why no full-on road race bikes with discs, I hear you ask? Of course, there are some rule breakers too and we've included an aero road bike, in the Colnago V1-R and an aluminium framed bike in the Cannondale CAAD10 SRAM Rival Disc, which brings these bikes to a more affordable (for most) price point. The majority of these bikes are of the more relaxed geometry found on long distance comfort endurance / sportive machines. There are good reasons why most motor car manufacurers switched over to hydraulic systems in the 1930's. a> 2015 KTM Revelator Sky Disc Road Bikeīut this guide isn't about cable brakes and steel frames, the bikes that we are focusing on in this guide are the new breed of disc road bikes, which in most cases means a carbon fibre frameset mated to either Shimano or SRAM hydraulic disc brake sets - calipers and levers. Then bikes like the Genesis Croix de Fer have shown how versatile a road disc bike can be - something that can be used for commuting, occasional cyclocross, touring, audax and riding 100km sportives. Cable operated disc set-ups based on the trusty Avid BB5 / BB7 or Shimano CX77 have been available on road bikes for some years and, of course, have infiltrated the cyclocross scene since the UCI allowed their use at the top level of the sport in 2010/11. So, get used to the idea of having improved stopping power on your road bike in all weather conditions.
Like them or think that you loathe them, disc road bikes are here.
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