The RAPTOR CS-M1150 Black-Rainbow is the 11-speed counterpart to the M1250 you viewed earlier. It is designed for riders using an 11-speed drivetrain who want a massive “climbing gear” (50T) without upgrading to 12-speed or changing their hub.
In the Turkish market, this is a popular “super-range” upgrade for bikes originally equipped with Shimano Deore M5100 or SRAM NX 11-speed systems.
## Technical Specifications
| Attribute | Specification |
| Speed | 11-Speed |
| Gear Range | 11-50T (11-13-15-18-21-24-28-32-36-42-50) |
| Freehub Type | HG (HyperGlide) — Standard 8-11sp MTB hubs |
| Weight | ~595g – 610g |
| Spider | Anodized Black Aluminum |
| Finish | Black-Rainbow (Oil Slick / Aurora) |
| Material | High-tensile Steel cogs with Aluminum spider |
### Key Features
-
Extreme Range (11-50T): Most standard 11-speed cassettes top out at 42T or 46T. The 50T “mega-cog” provides a significant advantage for steep technical climbs, effectively giving you a “bail-out” gear similar to modern 12-speed Eagle systems.
-
HG Compatibility: It slides directly onto a standard splined freehub. You do not need a specialized Microspline or XD driver, saving you the cost of a new hub or wheelset.
-
Rainbow Aesthetics: The large cogs feature a durable multi-color electroplated finish. It is highly resistant to chain wear and adds a high-end, custom look to the bike.
-
Weight Management: By using a black aluminum spider to hold the largest cogs, the cassette remains relatively light for its size while protecting your freehub body from gouging.
### Compatibility & Setup Notes
-
Rear Derailleur: You must use an 11-speed rear derailleur with a long cage (SGS).
-
Shimano: Compatible with Deore M5100-SGS. Older M8000 (XT) or M7000 (SLX) may require a “GoatLink” or derailleur extender to clear the 50T cog comfortably.
-
SRAM: Compatible with NX/GX 11-speed long-cage derailleurs.
-
-
Chain Length: Because of the jump to 50T, you will almost certainly need a longer chain (usually 116 or 118 links) than what was used with a standard 11-42T cassette.
-
B-Gap Adjustment: Proper adjustment of the B-tension screw is critical for this cassette to ensure the upper pulley wheel doesn’t hit the 50T cog during shifts.
Comparison Tip: Compared to the Shimano Deore CS-M5100 (11-51T), the Raptor is lighter (due to the aluminum spider) and offers the unique Rainbow finish, whereas the Shimano is typically all-steel and finished in basic silver/grey.






