Shimano BR-RS505 Caliper Fixing Bolt C - 20mm Frame - Y8N208010

Customer Reviews (3)
5 / 5| Write your review
£5.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
For use with Shimano BR-RS505 disc brake calipers.

33mm bolt for use with 20mm Rear mount thickness.

This Caliper Fixing Bolt C can also be used on the following brakes:

- Shimano Ultegra BR-R8170
- Shimano Ultegra BR-R8070
- Shimano 105 BR-R7070
- Shimano Tiagra BR-4770
- Shimano Deore XT BR-M8110
- Shimano SLX BR-M7110
- Shimano GRX BR-RX810
- Shimano GRX BR-RX400
- Shimano BR-RS805
- Shimano BR-RS405
- Shimano BR-RS305
- Shimano BR-UR300
- Shimano Metrea BR-U5000

These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc.

If the correct Caliper Fixing Bolt C is unavailable you can also use the bolt from the following brakes:

- Shimano Dura-Ace BR-R9170
- Shimano XTR BR-M9110

These are a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc.

Genuine Shimano replacement part.
Product Reviews (3)
Questions & Answers (6) Q & A
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Product Reviews (3)
Overall Product Rating 5 / 5
You had the part!
By Anonymous
30 Apr 2018
5 / 5
I recommend this product
Not a very easy part to find, so glad you had it. Full marks to SJS. As for Shimano's decision to include one set of bolts and to set the price so high if you needed different ones - not so happy, and it's not something you want to bodge...
Essential Bolt!
By Mr G
05 Apr 2017
5 / 5
I recommend this product
ProsGreat fit - Essential for build -Shimano quality
Needed shorter bolts for my 2cm thick chainstays. SJS seem to stock all those little essentials that other stores "can order". Easy to order, fast delivery-brilliant.
Fit For Purpose Bolt
By Anonymous
29 Jul 2016
5 / 5
I recommend this product
ProsGenuine product fit for purpose
Very good service, items sent quickly. The items were correct as I needed the specific bolt length to fit the flat mount brake bosses on the frame.
Questions & Answers (6)
Are there special bolts for front caliper fixing to fork?
20 Apr 2021
For Ultegra BR-8070.
Yes- you will need to use a specific fixing bolt. Fixing bolt C is for the rear caliper only.

Thanks 21.04.21
Hello, to confirm, can these bolts Y-8N2 08010 Be used on the dura ace rear disc brakes
20 Jan 2021
Depends on which exact brakes are in question- what's the BR code on your brake caliper?

Thanks- 20.01.21
Can't I use regular brake caliper torx bolt instead of these shimano parts?
02 Sep 2019
I can't see why I would need these special type of bolts for fixing a flat mount rear caliper. I currently use Sram Rival and the rear caliper bolts are m6*22 from my local hardware store. Won't they work for shimano as well?
We would recommend that you use these parts for fixing a flat-mount rear calliper to your frame.
Cannondale SuperX
23 Apr 2018
Hi there- apologies if this is asking the obvious but just checking. I've measured the chain stay at 2cm and the total bolt length is 45mm inc the non threaded section for the clip. Is this the correct bolt?
Hi there,

The threaded section is 26mm, the overall is 39.5mm

Washers For R160 Adaptor
29 Jun 2017
Shimano states that when using these to fit the R160 adaptor you should also use these washers - Y8NU02000

Do you stock these or do they come with the bolts or with the adaptor?


We do stock these washers they're SJSC part 45311.

Does Your Product Number 40181 Come As A Pair Or Ate They £5.99 Each Pls.
30 Jul 2016
Need two for a new build.

These bolts are sold individually, so you'll need to purchase two for a pair.