Shimano Mtb hydro caliper and dual control levels
01-15-23, 12:49 PM
#1
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Shimano Mtb hydro caliper and dual control levels
I have a 2018 steel road frame with IS mounts.
https://www.fyxation.com/products/quiver-disc-frameset
Is it possible to use Shimano MTB hydro calipers (SLX or XT) with Shimano Dual Control levels (GRX or 105)?
I see there is a flat mount caliper to IS mount adaptor, but from what I've read, there is a significant possibility that it may not work on some frames.
https://www.fyxation.com/products/quiver-disc-frameset
Is it possible to use Shimano MTB hydro calipers (SLX or XT) with Shimano Dual Control levels (GRX or 105)?
I see there is a flat mount caliper to IS mount adaptor, but from what I've read, there is a significant possibility that it may not work on some frames.
01-15-23, 01:49 PM
#2
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It is possible, but Shimano has two hydraulic formats based on the inner diameter of the hydraulic lines. You really shouldn't mix BH90 line levers (GRX) with higher volume BH59 line calipers. There should be a BH90 line caliper that is IS or post mount.
If not, the adapters usually work.
If not, the adapters usually work.
01-15-23, 04:20 PM
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Clark W. Griswold
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You would want to go IS to Post mount and you can mix and match though the Servo Wave brakes tend not to perform as well with road levers. I would just get some road post mount stuff or if you really need a quad piston Hope makes a mineral oil brake which is more or less designed for road/gravel bikes. A.S.S. out of Canada does make a IS to Flat but that is an extremely uncommon mount. IS is also uncommon these days not totally gone mount wise but it is rare you would find brakes for IS everything is post or flat mount these days.
01-15-23, 10:09 PM
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old XT (M785) caliper
could be paired with road levers
just about any current / recent upper level Shimano caliper can be paired with Shimano upper level flat or road brake levers
Last edited by t2p; 01-15-23 at 10:16 PM.
01-16-23, 05:30 AM
#5
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Much appreciate your help, I did not know there were different line volumes.
https://epicbleedsolutions.com/blogs...sert-do-i-need
https://epicbleedsolutions.com/blogs...sert-do-i-need
01-16-23, 07:52 AM
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BH59 typically found on the lower end stuff ; BH90 (typically) used on the higher end stuff
hoses have same outside diameter - BH59 has larger bore / inside diameter and is slightly more flexible
the hose inserts / pins are different (due to different inside diameter) - but olives are the same
should use BH90 with the higher end stuff - but you can use BH59 also (there are no internal differences that require the use of a specific hose)
a more notable / significant issue is the caliper / rotor track width :
the lower end stuff uses calipers / pads and associated ‘wide track’ rotors (resin pad only recommended)
the higher end stuff uses calipers / pads and associated ‘narrow track’ rotors (resin or metallic pad)
the better narrow track rotors cannot be used with many lower end calipers / pads because the pad can contact the rotor supporting arms
hoses have same outside diameter - BH59 has larger bore / inside diameter and is slightly more flexible
the hose inserts / pins are different (due to different inside diameter) - but olives are the same
should use BH90 with the higher end stuff - but you can use BH59 also (there are no internal differences that require the use of a specific hose)
a more notable / significant issue is the caliper / rotor track width :
the lower end stuff uses calipers / pads and associated ‘wide track’ rotors (resin pad only recommended)
the higher end stuff uses calipers / pads and associated ‘narrow track’ rotors (resin or metallic pad)
the better narrow track rotors cannot be used with many lower end calipers / pads because the pad can contact the rotor supporting arms
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