Is there a market for hydraulic rim brake calipers?
Moderator: robbosmans
Not really, or at least not yet. After all Sram and Shimano still offer all their latest groupsets (except Rival) with rim brake shifters.
If anything the demand for hydraulic rim brakes has gone down since more touring bikes will have discs now. Magura still sell to that market and the trials world afaik.
If anything the demand for hydraulic rim brakes has gone down since more touring bikes will have discs now. Magura still sell to that market and the trials world afaik.
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Hydraulic main advantages:
1) Flexible hose, so it can route through frame easily. This doesn't benefit most existing frames design for cable rim brake. And small manufacturers can't influence frame makers to do full internal cable rim brake bike.
2) Easy to multiply leverage. But... rim brake lever cable pull and brake caliper leverage ratio are normally paired well already. More leverage is actually detrimental as it trade pad clearance for power.
Rim can't take too much hydraulic clamping force. Rim don't remain true enough to run pads super close to the rim. So, using very high leverage like disc brake doesn't work.
3) Less transmission loss, this benefit is still here.
1) Flexible hose, so it can route through frame easily. This doesn't benefit most existing frames design for cable rim brake. And small manufacturers can't influence frame makers to do full internal cable rim brake bike.
2) Easy to multiply leverage. But... rim brake lever cable pull and brake caliper leverage ratio are normally paired well already. More leverage is actually detrimental as it trade pad clearance for power.
Rim can't take too much hydraulic clamping force. Rim don't remain true enough to run pads super close to the rim. So, using very high leverage like disc brake doesn't work.
3) Less transmission loss, this benefit is still here.
Running the hoses would probably require adapters to mount the hydro lines to approximately where the cables went using the old cable stops. That's the main drawback IMO
My other idea was building a module that goes under the stem or something that converts hydraulics to cable pull, then you run the cable from there as usual.
I'm not saying it's an amazing idea I'm just wondering if there would be a demand.
My other idea was building a module that goes under the stem or something that converts hydraulics to cable pull, then you run the cable from there as usual.
I'm not saying it's an amazing idea I'm just wondering if there would be a demand.
If you want all the disadvantages of rim brakes and hydro brakes combined in one unit, then sure, otherwise an absolute nope. I'd be amazed if anyone was developing one of these at this stage.
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But again, you can still buy cable brake shifters for every road group except Rival AXS and they're cheaper than the hydros, so where's the market?
Giant did the opposite of that to run cable shifters with hydro disc brakes on its cheapest bikes, it looked awful. I'm not sure where you've got the idea there's a new gap in the market for doing it the other way around. People who want rim brakes are buying rim brake shifters same as they always have.spartacus wrote: ↑Fri Jun 03, 2022 8:10 pmRunning the hoses would probably require adapters to mount the hydro lines to approximately where the cables went using the old cable stops. That's the main drawback IMO
My other idea was building a module that goes under the stem or something that converts hydraulics to cable pull, then you run the cable from there as usual.
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The new Shimano DA if you want wireless it only comes in hydro only.
I am thinking the next Sram will not support cable brakes.
I am thinking the next Sram will not support cable brakes.
This is what I mean. I feel like someone would want these right?PoorCyclist wrote: ↑Fri Jun 03, 2022 11:18 pmThe new Shimano DA if you want wireless it only comes in hydro only.
I am thinking the next Sram will not support cable brakes.
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You'd go for rim brakes if you want light weight, low maintenance and simplicity and aren't that fussed about braking power. Rim brake power is limited by the rim surface, especially in the wet on carbon rims.You also have limited clearance.
Now if you're quite light and ride somewhere dry and without genuine mountains, cable operated rim brakes are just fine. But change just one of those 3 variables and discs have an advantage. Change 2+ and it's not even close.
I don't see hydro rim brakes as addressing any of the issues, but they would take away the biggest benefits.
I still happily ride a rim brake bike for most summer rides, and plan on keeping one in rotation indefinitely, but as a whole, the industry has moved on.
Now if you're quite light and ride somewhere dry and without genuine mountains, cable operated rim brakes are just fine. But change just one of those 3 variables and discs have an advantage. Change 2+ and it's not even close.
I don't see hydro rim brakes as addressing any of the issues, but they would take away the biggest benefits.
I still happily ride a rim brake bike for most summer rides, and plan on keeping one in rotation indefinitely, but as a whole, the industry has moved on.
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I run hydro22 shifters on my gravel bike (I like the simplicity of cable shifting on gravel/traveling) so I could see a possibility of being able to swap these out onto one of my road frames with rim brakes. Biggest issue as you mentioned would be cable stops/internal routing that would require at least grommets for various bikes.spartacus wrote: ↑Fri Jun 03, 2022 11:55 pmThis is what I mean. I feel like someone would want these right?PoorCyclist wrote: ↑Fri Jun 03, 2022 11:18 pmThe new Shimano DA if you want wireless it only comes in hydro only.
I am thinking the next Sram will not support cable brakes.