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Shimano ST-RS685 Hydraulic Disc Brake STI & BR-RS785 Disc Brake (Post Mount) is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
Shimano ST-RS685 Hydraulic Disc Brake STI's & BR-RS685 Disc Brakes
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Shimano ST-RS685 Hydraulic Disc Brake STI's & BR-RS685 Disc Brakes

This item was discontinued 17th March 2020.

If you require help finding an alternative to this product please contact customer services.

Code: ST-RS685PA2
Left Hand Shimano ST-RS685 Hydraulic Disc Brake STI's & BR-RS785 Disc Brake Caliper, complete kit with all hoses and cables.
  • Precision-engineered STI levers for hydraulic disc brakes offer powerful braking and effortless 11-speed shifting
  • Polymer coated shift cables are routed under the bar tape
  • Vivid indexing provides a constant amount of shift lever force across all 11 sprockets
  • Ergonomic short shift arc follows natural hand movement
  • Hydraulic brake lever provides powerful, controllable and consistent stopping power with less effort especially from the hood position
  • Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear
  • 10 mm reach and free stroke adjustment enable custom feel and fitment for all hands
  • Easy bleed and clean hydraulic system, for use with Shimano mineral oil only
  • Please note: May be supplied with the standard non-finned pads, not the finned pads as pictured
Mr PEACHEY Very well priced and quick service. The product dose what is says on the tin . Left hand shifter , post mount brake supplied with finned brake pads with a 900mm hose for front brake ( this is the european set up , in the uk it´s the otherway around) . Shifting is firm and precise , an improvement over the 105 level components it has replaced. The brakes are easy to operate from the hoods with very little effort.
Mr Lucas Very straightforward installation process. No need for bleed kits.
Adrian Typically excellent Shimano stuff. The hoses supplied were both over-long as they are intended to be a universal fitment and shortening them means that you have to bleed them so it's worth thinking about buying the necessary tools (the funnel's extremely effective) to do this. Also come with short lengths of OT-SP41 gear cable outers and gear cables but my bike has completely enclosed gear cables so I had to get OT-SP41 outers elsewhere
Simon Excellent braking and shifting; supplied pre-bled, just need to thread the hoses, feed the hose into the shifter and tighten the nut! Mine did come with the finned pads shown in the pictures.
SKR Bought this as a replacement after wrecking my previous STI lever. Setup was easy and the brakes were pre-bled. Very responsive braking and easy shifting. Only minus is that the levers are slightly bulky and heavy for my liking.
thom Upgraded from some cable discs (which I thought were good) and the difference is amazing. Solid, controllable power. One finger braking. Hood shape is comfortable too - slightly longer than 6800.
Mr Hutchins Love this, has turned my cable pull CX bike into a really sure footed beast. Has probably saved my £2k in buying a new bike (with the same spec`d Group set). Arrived plug-and-play, you can just plug the pre filled hoses into the levers and you`re off. Hoses are a little long for a small bike but probably ideal for a large. To shorten, normal cable cutter can trim hoses and you just need a new brass plug for the cut end (as I doubt you`d get the factory fitted one out).
Mr Bilgitoglu Very stylish and quality product. Soft gear changes and very strong braking. Setup is easy. Merlin cycles offers the best price. I would definitely recommend it.
Mr Yeatman Initial impressions are great. Easy to install and a massive improvement on my cable actuated disc caliper. Yet to see how much ongoing fiddling they may require but I was forever having to adjust my Spyres
john I doubt it would be possible to fit a better mechanical shifter and hydraulic brakes to a bike. There is no difference in feel/shifting to the normal Shimano Ultegra and the brakes are fantastic in all conditions.
Mr Mitchell Very happy with the price and shipping to the US. The shifters are fantastic and offer a noticeable upgrade over 105s. Ergonomics of the levers are very comfortable and comparable to 6800's with an extended hood. The hydraulic brakes are smooth and provide more confidence over mechanical disc brakes.
Mr O'Leary These are a great brake system let down by possibly the worst fitting hoods I have ever seen. It's like they are not even designed for these levers!! Not only do they look ridiculous and move around when you're on the horns (which for me is most of the time), they have begun to move around to the point where they catch/impede the inner lever mechanism (up shift on the right, down shift on the left) resulting in "nothing" when you go to make the change. It's extremely disappointing that an otherwise excellent (and not cheap) brake system is let down by a low cost component that could have easily been sorted by Shimano.
ezweave Using these on an "all road" bike. (One caveat: I am using a different, flat mount caliper up front as the ENVE GRD fork requires it.) When set up, the shifters work flawlessly. After years of using Force, the smooth operation, albeit slightly slower, shifting of these Ultegra style levers is a marked improvement. The calipers work well, though, as seems to to be the Shimano "road" style (and yes, I know these are really just modified XT units), when bleeding you might not want to use the yellow separator to keep the pads apart... e.g. you might want to slightly overfill them. The reason for this is that despite the reach adjustment and free-stroke, you might want the engagement point a little further out. Speaking of which... there are a few wrinkles with this. First of all, make sure you REALLY crush the olive when you're setting up the lines. They do come setup for "quick" connection (e.g. with fluid, etc), but the hosing will probably be too long. Torque that thing in there! It can take more than you think and really has to be tight to prevent leaks. Second, free-stroke is noticeable on MTB levers, but here... it's just too subtle. Third, the reach adjustment screw location is... impossible. You can barely see the head (it's underneath the inner shift lever) and is hard to adjust. Finally, the last minor wrinkle: the rubber hoods just don't like to stay in place... especially if you use 3mm bartape and figure-8 the wrap (so you don't use cheater strips). You just really have to stretch it thin or they will never quite "sit." All in all, a fantastic product, with just a few gripes. I will say that I prefer the separate bleed valve and valve release on these calipers to the other style (where they are together). It's a little easier to hook the hose up. But they're a great deal and work flawlessly when set up.
camo Got these for my disc roadie. Brakes are fantastic. Excellent modulation. Matched to Dura Ace RD and FD and shifting is crisp and accurate. The hoods SUCK though, they are loose and baggy. A known issue to Shimano but sold them to me none the less. Had to buy a replacement set (Updated design).
Castren Crazy good. Works on my Felt F1x build perfectly. As good as my Shimano MTB brakes. Its nice that I can stick with the same shoes fluids and other parts. I think the form factor fits well for my hands. The braking is superb... as expected.
Andy Banks These are absolutely awesome. I upgraded from 105 shifters and TRP Spyre mechanical hydraulic brakes and the difference is astounding. Shifting is really light and positive, but more the braking is the best I have ever had on a road bike. One finger stopping power and great modulation. Package comes with new shift inner,and fluid, but you'll need the shimano filling funnel.
Nick Julian Neat bit of kit comes complete with oil and all cables for gears, shifters are slightly larger than normal but feel OK in your hand - you may need caliper adapters for IS mounts on forks !!
Ian Upgrade from cable brakes too these on my Caadx and they are excellent!!!! Easy to fit and the braking power is amazing. You do need to buy a special tool to bleed them up though.
Dorrian These brakes are fantastic. Having ridden hydraulics on my MTB for many years I found road bike brakes shockingly poor by comparison - even cable discs. My biggest gripe is the effort required to slow down - I've nearly overshot the corner a few times due to not applying enough force to the levers quickly enough on my TRP Spyres. The RS685 is just like a MTB brake. It takes light pressure to apply a lot of power. You can probably get similar power from a rim or mechanical disc brake, if you really tug on the levers, though I couldn't. The 685s make stopping quickly every bit as controlled, relaxing, and consistent as a MTB brake. They are just great. I love the smooth light action and easy modulation. I've read reviews that they have too much travel, clamping right down to the bars. This isn't the case if bled correctly. Mine stop a good 3/4" from the bar and travel no more than Shimano MTB brakes, though more than my Hope M4s.
Mr Vest I upgraded from cable brakes and the feel is a lot better; less effort is required to get a given amount of stopping power.
Richard Pointon After having mechanical disc brakes then semi hydraulic on my Cannondale Synapse, I finally plucked up the courage to drill out the cable frame stops and fitted the wonderful Shimano hydraulics. These brakes far outperform the others and have great modulation on descents, wish I had fitted them earlier.
Mr Bender The calipers are ugly, but damn it they work so well
Mr Dobbs Bought these as an upgrade over my 105 shifters paired with Avid BB7 mechanical calipers. They surpass my previous setup in every way, shifting is far crisper with a much more positive click. Braking performance is the true star of the show, more power, less effort at the lever and a far better modulation. Great upgrade!
Spreaders Love em, smooth strong braking and super smooth shifting. Heavier than standard levers of course but well worth the penalty.
Simon Ablett Capable of changing the way you ride! Best braking performance I have ever experienced on drop handlebars, comparable with MTB stopping power, super smooth shifting and good looking kit. Easy to fit and bleed and surprisingly not that bulky considering how much extra functionality has been squeezed under the hoods. Very impressed. Bought these for my Ti gravel/cx bike but will switched my main carbon road machine to them as soon as more frame/wheel manufacturers embrace the standard.