BH90 Hydro Cable with R785 brake that uses BH59 hose

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Hamfist
Posts: 84
Joined: Sun Feb 03, 2008 3:04 pm
Location: Bloomfield Hills, Michigan

by Hamfist

PaulH wrote:Yes it does work (I’m running that exact setup), feel after a good bleed is less lever throw and in my opinion. Be careful with the bleed screw on the levers as they are easily broken


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Good to know...thx!!

LameLeg
Posts: 2
Joined: Tue Oct 25, 2016 12:59 pm

by LameLeg

ms6073 wrote:
ParisCarbon wrote:Apparently with the Ultegra and Dura Ace new Hydro Di2 shifters, no changes are required at all...

Just be sure that you source the correct BH-90 hydraulic hose kits, as I found there are two variants with one containing correct fittings for the new DA/Ultegra hydraulic shifters, and the older kits for R785/R685 shifters. Referencing the image below, the fitting circled in red is required for the DA ST-R9150/R9170 and Ultegra ST-R8050/R8070 shifters:

Image


Has anyone managed to pair the R9170/R8070 series levers with banjo style brake calipers like the XT/XTR/R785, using the BH90 hose (w/crimped banjo end) using the larger connecting bolt? I believe the larger connecting bolt can be purchased using the Shimano part number: Y8RD98010.

Would like to try this once the R8070 levers are more readily available, but not sure if the larger connecting bolt will be compatible with the BH90 banjo style hose.

by Weenie


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lazypete
Posts: 19
Joined: Fri May 25, 2018 7:00 pm

by lazypete

Hi, sorry to resurrect an old thread.

I'm wondering whether anyone has experience of this issue from the opposite end. I'm swapping a groupset onto a new frame, from post to flat mount and want to upgrade to 8070 callipers. I'd like to keep using my ST RS505 shifters until I raise the cash for the rest of a Di2 groupo. Can I keep my BH59 hose, or use a BH90 hose set to make that work ? The compatibility charts are a bit confusing as they suggest that rs505 shifters are compatible with 8070 callipers, but that the shifters arent compatible with the bh90 hoses specified for the calipers.

https://www.google.com/url?sa=t&rct=j&q ... 8LJQ5dKwxi (can't attach a pdf)

Any experience gratefully received.

CallumRD1
Posts: 151
Joined: Mon Apr 03, 2017 2:54 pm

by CallumRD1

I’m not familiar with the 505 shifters, but I should be correct in saying that the BH59 and BH90 Hosea are completely interchangeable as long as you have the correct connectors on the ends.

hogehoge
Posts: 62
Joined: Mon Feb 25, 2013 11:59 pm

by hogehoge

LameLeg wrote:
Sat Nov 25, 2017 7:57 am

Has anyone managed to pair the R9170/R8070 series levers with banjo style brake calipers like the XT/XTR/R785, using the BH90 hose (w/crimped banjo end) using the larger connecting bolt? I believe the larger connecting bolt can be purchased using the Shimano part number: Y8RD98010.

Would like to try this once the R8070 levers are more readily available, but not sure if the larger connecting bolt will be compatible with the BH90 banjo style hose.
Yes, I just done a build like this. Retail set of R8070 levers which inlcudes the BH90 hose kit with all adaptors/connectors. For the caliper I used the non-series post mount BR-RS785 calipers which will accept the hoses and connecting bolts. Calipers need to be the RS version, the simialar R785 calipers use a banjo connector and won't work with the default R8070 hose kit.

tomee
Posts: 220
Joined: Thu Oct 16, 2014 8:52 am
Location: AUS

by tomee

so i just did this and can confirm the below.

swapped over my 785 shifters to the new 9170.

on my front brakes i changed the cables over to the BH90 paired with BR785 brakes.
for my rears i left the Bh59 hoses with BR805 flat mounts.

straight away i noticed much less lever throw. My rears are a little spingy atm and not sure if thast because of the BH59 hose or i need to bleed it better.

trickytree1984
Posts: 29
Joined: Tue Jun 19, 2018 1:31 pm

by trickytree1984

Hello,

Sorry to resurface an old thread. I recently attempted to convert my winter bike to Di2. I had a spare groupset as i broke my summer bike. To do this i needed Di2 hydro levers as the broken bike was not disc.

This involved changing the levers from RS505 to R8070 levers. I couldn't get the hose to seal on one lever. My bike mechanic didn't spot the reason why and told me the lever threads were stripped. I returned them only to find that the hose kits and bolts are different (by reading this thread and others).

Anyway, ive purchased a new set that come with hoses this time. Will i be ok to use the new BH90 hoses, pins and olives with my old RS505 calipers? I see in this thread that the hoses are interchangable, but are the pins and olives? I will still have the caliper connecting bolts if required.

Thanks

lazypete
Posts: 19
Joined: Fri May 25, 2018 7:00 pm

by lazypete

I used all the parts that came with BH90 hoses to connect 8070 callipers to RS505 shifters and it seems to be ok.

I think the bolts are the same, it's just the insert (and maybe olive) that's a different size for the new hose.

trickytree1984
Posts: 29
Joined: Tue Jun 19, 2018 1:31 pm

by trickytree1984

Spot on. Thanks

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ms6073
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Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

trickytree1984 wrote:
Wed Aug 15, 2018 11:06 am
This involved changing the levers from RS505 to R8070 levers.

Will i be ok to use the new BH90 hoses, pins and olives with my old RS505 calipers?
lazypete wrote:
Wed Aug 15, 2018 1:27 pm
I used all the parts that came with BH90 hoses to connect 8070 callipers to RS505 shifters and it seems to be ok.

I think the bolts are the same, it's just the insert (and maybe olive) that's a different size for the new hose.
The caliper hose fitting bolts are the same, but not for the levers. Referencing my post from September of last year, the R8070 hydraulic levers require a different fitting than the RS505 levers, so the BH90 hose kit will work for R8070 levers to RS505 calipers as long as you have the kit with the oversize fittings for the R8070 hydraulic levers.

Image
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

trickytree1984
Posts: 29
Joined: Tue Jun 19, 2018 1:31 pm

by trickytree1984

ms6073 wrote:
Wed Aug 15, 2018 3:45 pm
trickytree1984 wrote:
Wed Aug 15, 2018 11:06 am
This involved changing the levers from RS505 to R8070 levers.

Will i be ok to use the new BH90 hoses, pins and olives with my old RS505 calipers?
lazypete wrote:
Wed Aug 15, 2018 1:27 pm
I used all the parts that came with BH90 hoses to connect 8070 callipers to RS505 shifters and it seems to be ok.

I think the bolts are the same, it's just the insert (and maybe olive) that's a different size for the new hose.
The caliper hose fitting bolts are the same, but not for the levers. Referencing my post from September of last year, the R8070 hydraulic levers require a different fitting than the RS505 levers, so the BH90 hose kit will work for R8070 levers to RS505 calipers as long as you have the kit with the oversize fittings for the R8070 hydraulic levers.

Image
Perfect. I believe it will come with the kit you have pictured.

FuelForThought
Posts: 27
Joined: Wed Jun 13, 2012 9:01 pm

by FuelForThought

ms6073 wrote:
Thu Sep 21, 2017 2:25 pm
The BH90 hose sets made a slight difference in lever feel (stiffer) on our CX bikes with ST-R785 shifters and BR-RS785 post mount calipers, but some of this will depend on the amount of free-stroke adjustment.
I just got off the phone with Shimano USA to ask them what BH90 hose kit to purchase in order to connect ST-R785 shifters and BR-RS785 post mount calipers. There answer was that it was not possible. :cry:

Would you know which specific hose kit you used? Or is it simply a matter of changing the hydraulic line and keeping the old fittings into the shofters and calipers?

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ms6073
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Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

FuelForThought wrote:
Thu Aug 30, 2018 10:20 pm
There answer was that it was not possible. :cry:
Whomever you spoke with at Shimano - well suffice to say that person should stop answering the telephone. :shock:

2-minutes of searching and viola - Shimano BH90-SS 1700mm Brake Hose - found on Amazon.
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

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gazzaputt
Posts: 293
Joined: Fri Mar 31, 2006 2:32 pm
Location: Bexley, Kent, UK

by gazzaputt

Okay can someone confirm for me?

ST-785 shifters > BH90 hose > BR-805 calipers

Have the correct connections. Will at last elivate the awful lever throw that I have with BH-59 hoses?

by Weenie


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ms6073
Posts: 4288
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

The BH-90 hydraulic hose should improve lever feel and actuation, but the outcome is entirely dependent on brake bleed, free stroke adjustment, and lever reach adjustment (see page 47 in the Hydraulic Disc Brake Dealer Manual).
- Michael
"People should stop expecting normal from me... seriously, we all know it's never going to happen"

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