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Shimano Adapter for Flat Mount Caliper to Road Flat Frame Mount - Rear 160mm

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Details
- Interchangeable, precision engineered disc calliper mount adapter.
- For direct flat mount type disc callipers to be mounted to direct flat mount type frames with 160mm disc rotors.
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Questions & Answers (12) Q & A
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Questions & Answers (12)
Why does this have a shorter silver bolt with no tab?
By
23 Nov 2024
Normally this mount is pictured with two black bolts with "tabs" at the end and a black clip. Why does this one have a silver bolt without the tab? Can either be used without any issues or is it for specific models/reasons?

Sorry I tried posting a question already but it looks like it was formatted incorrectly.
The silver spacers are for shimming the bolts to the correct length depending on frame thickness, the silver bolt is for under the calliper and the black bolt is for the mounting hole which is not covered by the calliper and is to be secured with the pin. SK 27/11/24
Hi - is this adapter compatible with the rear GRX Caliper (Code BR-RX400)?
By
20 Jun 2022
This will suit the Shimano GRX BR-RX400 Flat mount Caliper.

JK 21.06.22
Washer thickness?
By
25 May 2022
Hi! What's the thickness of those two washers? Thanks!
Thank you for your enquiry, the washers are 2.6mm thick

WD 25/05/22
Will this work with Sram (rival) flat mount brakes too?
By
23 Jan 2021
We cannot say as we have not tested this with Sram brakes- you may find that while the adapter plate fits the bolts might not be the correct size or length for a Sram caliper.

Thanks 25.01.21
Can I use this adaptor with a 140mm rotor?
By
12 May 2020
Hi, no this is for 160 mm rotors. Thanks
can i use this adaptor to convert my hope caliper running a 160mm rotor down to a 140mm rotor
By
02 Aug 2019
Hi,

this adapter will space a flat-mount calliper on a frame or fork. it is used to convert a 140mm to a 160 mm rear disc.
Does This Come With Any Bolts/Washers?
By
29 Jun 2017
Second question - on the Chain Reaction site this adaptor is sold with 2 bolts for mounting the Caliper and 2 washers (Y8NU02000) for mounting to the frame. Does this come with these as well just leaving me to buy the correct length bolts?
Thanks
Hi, yes it comes with bolts and washers. Thanks.
Mounting Bolt Snap Retainer
By
28 Jun 2017
Hi
Shimano states in the manual that you should install this adaptor in the frame using caliper mounting bolts with the little mushroom head. You should then put a snap retainer on top of the bolts - part number Y8NU03000 (shown also on your tech doc).
Do you stock these as I can't find them on your website?
Hi,

We have just added these snap retainers to the website, you should be able to find them under SJSC part 45310.

Thanks.
What Is The Thickness Of This?
By
29 May 2017
Shimano say 13mm must protrude through frame. I need bolts for my RS505's that go through 20mm of frame plus the adaptor plus 13mm. can you supply these? Thank you.
Hi,

The 13mm protruding through the frame is what would be required to fit into the adaptor or directly into the brakes. So the bolts you need are just the ones designed for 20mm frames as these have a 33mm overall length. we stock these and they are SJSC part number 40181.

Thanks.
Front Adapter
By
22 Mar 2017
The front adapter for flat Mount shimano 140/160 mm is not avaible?
I must buy the complete brake caliper BR-RS805?
Hi,

We do stock the front mount that you require, these are SJSC part number 40188.

Thanks.
Adapter For 180 Mm Flat Mount
By
04 Feb 2017
I'm after a adapter or block to fit with existing and adapter to run on shimano front flat mount . So I get the same braking for less pressure
Hi,

Unfortunately there is currently no adaptor available from Shimano to allow you to use a flat mount caliper on a flat mount frame with a 180mm disc rotor.

Thanks.
Changing A Rear 140Mm Flat Mount To 160Mm
By
04 Jan 2017
Is it possible to change a Rear flat mount 140mm to a 160mm flat mount and if yes what adaptor would I need?
Hi,

It is possible and this adaptor you have left your question on is actually the correct adaptor to achieve this.

Thanks.