Shimano RT-CL800 road and MTB bike brake disc with external nut
From 203 to 140 mm, external clamping nut
€46.68
Price : €59.99 (32 reviews)
Our opinion
Alexandre La.
Rider Elite XC for 5 years
A stylish and robust adapter allowing a Post Mount standard rear brake caliper to be fitted to an International Standard frame. It is available in several colours and for different set-ups, with brake discs ranging from 160 to 203 mm in diameter.
Technical specifications:
- Material: Aluminium
- Position: Rear
- Disc type: 160 to 203 mm
- Colours: Red / Black / Gold
- Brand: Massi
Our team suggests
You may also like
Shimano XTR adapter for rear MTB disc brake with postmount mounting on standard international 160mm disc frame
Rear postmount > IS 160mm
€11.15
Price : €15.95 (4 reviews)
Shimano Professional TL-BR Y13098630 Disc Brake Bleeding Kit
Official Shimano model
€45.99
Price : €79.99 (28 reviews)
Shimano B05S-RX organic MTB brake pads - EBPB05SRXA
Replacement for the B01S and B03S models
€4.89
Price : €9.99 (109 reviews)
Galfer SB001 Postmount brake caliper adapter +43 mm
160 to 203 mm, or 180 to 223 mm - front and rear mounting
€10.10
Price : €10.95 
Magura QM 45 Postmount to Postmount 180-220/140-180 mm brake caliper adapter
For 220 mm front disc, 180 mm rear disc
€8.95
Price : €10.00 (1 review)
Massi 6-hole centre lock adapter
Massi Centre Lock adapter for 6-hole disc brakes
€15.95
Shimano XTR adapter for rear MTB disc brake with postmount mounting on international standard 140mm disc frame
Rear postmount > IS 140mm
€11.15
Price : €13.99 
Shimano SM-MA-F203 Postmount to Postmount front brake caliper adapter
Offset +43 mm - 203 mm disc mounting
€11.11
Price : €12.99 
black
€9.95
(2 reviews)
Questions and answers
Talk to our experts
Be the first to ask our team a question
No questions for the moment
Votre avis compte pour nous
Nos clients les meilleurs ambassadeurs
-
Jean-François C. 
Published Dec 02, 2025 at 08:23 pm (Order date: Nov 07, 2025)Fits very well (Translated review)
- Mathieu B.
Published Aug 27, 2025 at 08:26 amNo information on the delivery time for a few days. (Translated review)
Other products
To discover
Sram X1 Type 2.1 11-speed MTB rear derailleur
11-speed single chainring - aluminium cage
€202.95
Price : €244.00 
Sram GX 11-speed single rear derailleur
for single chainring
€91.30 €101.30
Price : €120.00 (4 reviews)
- On sale!
- €10.00 economy
silver
Sram PC X1 11-speed MTB chain
Specific 1 x 11-speed
€27.35
Price : €32.00 (13 reviews)
Sram Pressfit GXP BB121 MTB bottom bracket
For Fat Bikes, adjustable in length from 92 to 121mm.
€30.55 €40.55
Price : €46.00 
- On sale!
- €10.00 economy
Sram Guide / Trail steel brake pads
Metal brake pads - For Sram Guide and Trail brakes
€17.20
Price : €24.00 (6 reviews)
black red green brown
Massi Elite lightweight foam MTB grips
Comfortable
€9.99
(4 reviews)
Massi Hayes MX2 / MX3 mechanical MTB brake pads
Organic for Hayes MX2 / MX3 mechanical
€7.66 €10.66
(1 review)
- €3.00 economy
Massi Shimano XTR BR-M985 2-piston MTB brake pads
Organic for Shimano XTR BR-M985 - 2-piston
€8.26 €10.66
(1 review)
- €2.40 economy
Shimano XT SL-M8000-RAP 11-speed right-hand MTB shifter
For 11-speed single, double or triple chainrings
€49.99
Price : €69.99 
Shimano XT RD-M8000 11-speed Shadow Plus rear derailleur
Medium or long cage, Shadow+ system
€71.00 €91.00
Price : €141.95 (8 reviews)
- €20.00 economy
