Shimano 160mm brake adapter fitting
Currently fitting some rs785 shifters/calipers, replacing a rival 1 setup. I’ve got a 160mm adapter for the rear (SM-MA-R160DDA), but a bit confused about the fitting. The adapter attaches to the caliper with those funny little pin-ended bolts, and here’s where I got confused…
On the front, putting those in resulted in a satisfying “click” when in place…no such sound here, despite being torqued-up.
The instructions also seem to suggest using the same type of bolt (and some washers), to attach adapter to frame…but as far as I can see these are regular threads with no place for the pin to go. I assume I’m being a humpty somewhere but not quite seeing where atm…
On the front, putting those in resulted in a satisfying “click” when in place…no such sound here, despite being torqued-up.
The instructions also seem to suggest using the same type of bolt (and some washers), to attach adapter to frame…but as far as I can see these are regular threads with no place for the pin to go. I assume I’m being a humpty somewhere but not quite seeing where atm…
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This may help:
https://si.shimano.com/pdfs/si/SI-8NU0A-001-00-ENG.pdf
As you can see, the adapter is for a flat mount frame/ caliper. The RS785 is post mount so I think you have the wrong adapter.
If your frame is flat mount you need a SM-MA-R160P/D to fit a post mount caliper such as the RS785 I think.
https://si.shimano.com/pdfs/si/SI-MAR0A-001-00-ENG.pdf
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Thanks, appreciated. I think I have the flatmount version (805 rather than 505 caliper?), and the fork mounts ok. Think maybe I need some extra short versions of the bolt...which appear to be sold at about £6 each!0
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This is an RS785 caliper;
https://www.bike-discount.de/en/buy/shimano-disc-brake-caliper-br-rs785-front-rear-213310
So I am now guessing you only have ST-R785 levers, coupled to BR-RS805 brake calipers?
https://bike.shimano.com/en-EU/product/component/ultegra-6800/BR-RS805-R.html
The dealer manual shows you how to fit, including how to determine what length bolts you require;
https://si.shimano.com/pdfs/dm/DM-BR0004-05-ENG.pdf0 -
garfy117 wrote:Thanks, appreciated. I think I have the flatmount version (805 rather than 505 caliper?), and the fork mounts ok. Think maybe I need some extra short versions of the bolt...which appear to be sold at about £6 each!
Haven't died yet.
Third option is hacksaw/dremel the bolts a bit shorter - but not too much!0