M785 new hose, which one?

BikeBen

Hi Everyone

I have Shimano M785 XT brakes. I'm about to get a new frame and I don't think the rear hose will be long enough. The big question is which hose do I need to get? I know that M785 hoses are different hence they need the olive with the silver insert (bh-90) and not the gold insert (universal). I think this is due to internal diameters being different...or something?

So because i needed the BH-90 insert do I need to get the bh-90 hose which is the XTR one?

http://www.chainreactioncycles.com/Mode ... elID=67212

Any help is much appreciated.

Thanks

YeehaaMcgee

According to Shimano, the olive, conenctor insert and cover is the same for the following brakes...

M985 (XTR)
M785 (XT)
M666 (SLX)
M596 (Deore? I think)

However, their part numbers (Y8JA98020 for olive & connector - Y8JA07000 for cover) do not tally with any "bh" part numbers.
Is that information of any help to you?

YeehaaMcgee

actually, it looks like a combination of this...
http://www.chainreactioncycles.com/Mode ... elID=14854

and this...
http://www.chainreactioncycles.com/Mode ... delID=1741

will be fine.

BikeBen

Hi

Thanks for your help but i'm not sure that's right...what's worse is I'm not going to be able to explain why very well. Here goes...

On the Shimano website (click below). Go to XT brakes and in the spec is says the hose is SM-BH90-SB. I checked and it says the same one for XTR but a different one for SLX (SM-BH59).

XT:

http://bike.shimano.com/publish/content ... ntain.html

SLX:

http://bike.shimano.com/publish/content ... ype-..html

When I first had the brakes I needed to shorten the hose for the current frame and was told by LBS not to use the universal olive and inserts as they that's what they tried and found after a few weeks they started leaking. I was told i needed to use the BH-90 olive/insert with a silver insert which I did and all seems fine. But I've read in loads of places people just using the universal one and being OK?! My theory was that I'm sure Shimano wouldn't go to the time and effort to design/manufacture a whole different insert if they didn't need to. I seem to remember finding out at the time that the current XT (2012 M785) brakes needed the same olive insert as the XTR which is why i thought the same might be the case for the hoses.

I was hoping to find definitive corroboration from someone who knows for sure rather than just me with my fuzzy logic.

Does that make sense?

mister p

Just buy an SM-BH90 hose kit with the banjo at one end and the straight connector at the other. This will come complete with the correct olive and silver insert so no need to worry about buying anything else.

http://www.tredz.co.uk/.Shimano-XTR-SMB ... _41433.htm

EDIT - the one in your original link is also the correct one.

YeehaaMcgee

BikeBen wrote:

On the Shimano website (click below). Go to XT brakes and in the spec is says the hose is SM-BH90-SB. I checked and it says the same one for XTR but a different one for SLX (SM-BH59).

That's the older SLX though, the one for the same generation (XTR M985, XT M785 and SLX M666) should be the same.

BikeBen

Yes, good point. My mistake, can't even find the M666 on the Shimano website. Thanks for the correction.

YeehaaMcgee

http://cycle.shimano-eu.com/publish/con ... /SLX.html#