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Shimano BR-RS505 Road Flat Mount Hydraulic Disc Brake Caliper - Rear

£44.99 Please note this product has selling restrictions to your country. was
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SJS Cycles part number : 
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- High performance low profile hydraulic road disc brake for efficient braking in all conditions
- Rear wheel use for 140 mm flat mount frames, can be used with adapter for 160 mm
- Oversized 22mm phenolic pistons optimized for heat insulation, lightweight and stiffness
- Opposed 2-piston design reduces leading effect and optimal pad wear increases braking control
- Increased pad to rotor clearance reduces the chance of rotor drag
- Forged calliper design is lightweight and rigid
- One way internal fluid circuit makes bleeding easy
- Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid
- Shim-less mounting bracket allows for quick installation and setting up
- Recommended for use with Ice Tech rotors for optimum braking performance
- Comes complete with resin compound aluminium radiation fin pad further improves heat dissipation reducing brake surface temperature by 50 deg C
- Inline hose routing for low profile design
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Questions & Answers (3)
New screws
28 Feb 2018
I need a new pad retaining screws you see in the picture with the slot for a flat head screwdriver

We do stock these replacement pad bolts, they are SJSC part number 30015.

Does this come with the mounting bolts?
27 Feb 2018
Hi there,

Yes this comes with mounting bolts.

Upgrade From Rs 505 To Rs 785
10 May 2017
I have bought a new bike wit RS 505 brakes. I would like to upgrade to Ultegra standard components - i.e levers & callipers - however the frame bolts are spaced at 35mm on the 505 but 70mm with the 785. The bike frame is direct mount and the rear through bolts are at 35mm whereas the front is 70mm with an adapter plate.
Is there any way to adapt the rear to 70mm spacing?


It is possible to convert your flat mount (35mm) frame for use with post mount calipers (70mm). There are two adaptors available; one for use with 140mm disc rotors which is SJSC part number 40380 and one for use with 160mm disc rotors which is SJSC part number 40368.