TimothyH

Brakes are Shimano levers, calipers and hoses. I'm going to replace the Shimano calipers with Hope. Fluid type will not change - it will still be mineral oil.

Can the hoses be reused or should I plan on routing new, replacement hoses?


-Tim-

jimc101

Will these even work, they use the same type of mineral oil (possibly not the same spec), but will the Shimano lever push enough for the Hope Caliper (on the basis this isn't the RX4 as you have given no specifics)

Also, Shimano hose comes in different versions, BH59 and BH90, do you know which/if it would be compatible with the Hope caliper?

TimothyH

Hope calipers come with fittings. The bike has BH59 hoses.

I'm asking if the hoses themselves can be reused, completely apart from any fitment or compatibility issues;.

Do people generally reuse the hoses or are they assemble once and then replaced after disassembly or ends cut off?


-Tim-

DrIsotope

So long as they're mechanically sound, and still long enough after you change out the Shimano caliper-end fittings with the Hope fittings, there's absolutely no need to change the hoses themselves.

dedhed

If everything is compatible and in good condition I wouldn't change it.

I wouldn't buy a new brake hose on a car if I was replacing a caliper unless it needed it, why would I on a bike?

jimc101

Because every bike component company has different incompatible specs, even down to the seating for olives and hose bores, there are standards for bike parts, just everyone has a different one.

dsaul

For those that don't know, Hope makes replacement calipers that are specific to either Shimano or SRAM brakes. There should not be any compatibility issues between the caliper and hose and no reason to replace the original hose.

jimc101

For Hope making replacement cross compatible caliper, they only do one, the RX4 (as previously mentioned), but we still don't really know what the OP is doing.

Given the OP still hasn't given any specifics on what they are planning to use, and on the basis that it's not RX4 calipers, found this post (it's the reverse (Hope levers/Shimano caliper)) someone contacted Hope, and the answer was no, which should still stand https://singletrackworld.com/forum/t...th-xt-caliper/

enveous

Hope does not make a complete road brake set so there is no option to "buy it all."

Hope does make road calipers that replace the stock Shimano/SRAM units, which is what informed folks are discussing.

enveous

Now you know.

Hope RX4 Calipers Gut Check

dsaul

I know the OP hasn't made it clear here, but he has a thread in Cyclocross and Gravel Biking that indicates that he has purchased RX4 calipers.

pdlamb

Will the hoses be long enough after cutting off the fittings?

enveous

What is the basis for your opinion?

TimothyH

You guys are amazing.

I have Shimano BR-RS805 calipers with Shimano ST-R785RL hydraulic Di2 levers. I'm changing the calipers to Hope RX4. Why is my own business.

The Hope calipers use Shimano mineral oil fluid. Fluid compatibility is not my concern but feel free to argue about it if it makes you happy.

My specific concern is disassembly and reassembly of the fittings at the caliper. I do not intend to cut off the fittings and would do so if the hoses were long enough, but they are not. I intend to remove the fittings from the hose and reuse the hose as is.

It is not a banjo type fitting. It is an insert, olive and 8mm(ish) hydraulic hose fitting.




Does installing the insert, olive and fitting on the end of the hose compress the hose or deform it in such a way as to render it unusable a second time? If the fittings on the hose are assembled and disassembled, can new fittings be placed on the same hose end a second time and expected to reliably hold pressure and not leak?

By the way, @DrIsotope. Thank you.


-Tim-

jimc101

Got to agree with fiestbob, realistically, all your going to gain is a bit of bling, if you have Shimano brakes, which the OP appears to have, as the RX4 are Post Mount, not Flat Mount, if performance is the aim, there are now plenty of Shimano 4 pot caliper options, which would be a very simple fit, as there would be no compatibility issues and greater performance than the stock 2 pot calipers.

TimothyH

No, they are flat mount.

https://www.hopetech.com/products/br...front-caliper/

https://www.hopetech.com/products/br...-rear-caliper/

Anyway, Hope is on your team Jim. They are manufactured within bike riding distance of West Yorkshire, in Barnoldswick. Maybe you could run up there and ask them for me.


-Tim-

jimc101

Into the badlands of Lancashire, got to be brave to do that.

TimothyH

Let me know what they say.


-Tim-

enveous

Well, I can see why you would agree with fietsbob as it seems both of you are quite confused about what you are trying to post about.

Next time, you both could save yourselves by doing a simple web search. Knowledge is a wonderful basis for a discussion.

https://singletrackworld.com/gritcx/...han-six-pence/

jimc101

Dude, most of this was posted with very little to no useful info from the OP, my last (relevant) post was made almost at the same time as the OP came in with much more detailed info, which made alot of what everyone had said, including me pretty much irrelevant.

This is pretty normal on BF, that someone posts something, either with far to little info, or cross post throughout BF, with all the relevant info, but where generally most people will only see snippets.

Then at the end of it, we get people like you coming in saying that the people like myself and fietsbob are idiots (yes, you are saying that, not matter how you put it) when we and others have only given as much help a we could with the info provided.

Thank you for your positive and helpful comments throughout this thread.

enveous

This thread currently has 23 posts. My first post was #11 . You are mischaracterizing what happened.


"fietsbob"'s contributions were not helpful. That lack of helpfullness resulted from a distinct lack of knowledge that wasn't dependent on whether the RX4 was called out in the first post, or not.


Thank you for your positive and helpful comments throughout this thread.

TimothyH

And only three had anything to do with my actual question.


-Tim-

jimc101

And you prove my point, that this was a cross-posting mess. which has now devolved into a who can delete their post first, resulting in a thread which makes less and less sense and point; which the OP should take a good portion of the blame (I mentioned the RX4 in my first reply, and the OP failed confirmed this within this post at that time, which would have clarified everything subsequent), with yourself the rest (as you failed to see that I had already asked about the RX4, but with no reply in this thread).

Your SRSLY post was demeaning and unnecessary and to a point offensive to the other poster (who has deleted their posts), who posted in their normal manner, but after you 30 odd posts you wouldn't know that...

enveous

Sharing the truth is demeaning? Correcting someone's erroneous posts is offensive?

That's nuts. As is fietsbob being embarrassed by his posts and deleting them. I've seen these nonsense outbursts by fietsbob and see no reason why his idle speculation shouldn't be corrected with facts.

p.s. I saw you mention the RX4, and I saw your subsequent erroneous claim that they were post mount. Much confusion and wringing of virtual hands about such a simple question.

jimc101

No. it's the way you said it, with the image, that was offensive. For my post about the PM vs FM, and being erroneous (your using big words now!) assumptions often have to be made with the infomation or lack of that is often supplied, they make both, the OP had failed to say which they were using, and when moving brake type, PM is still the most common for aftermarket calipers.