BLACKseries by ABSOLUTE BLACK chainring oval 1-fold LK 104 | 4-hole narrow wide black
The ultimate solution for Shimano and others on the 104 mm bolt circle diameter based cranks . If you've ever thought about installing a 1x9 / 1x10 / 1x11 / 1x12 drive and wondering how to solve the chaining problem, here's the answer.
BLACKseries chainrings have special teeth that prevent the chain from coming off. The principle follows that of the SRAM XX1 chainrings. In conjunction with a SRAM Type2 / 3 or Shimano Shadow + rear derailleur, which have a greatly increased bias of the cage, the chain is reliably held in position even without chain guide.
Ovalization of the chainring enhances performance and off-road traction through powertrain variation and drag optimization. When pedaling, the natural strengths and weaknesses are reconciled. Thus, a better use of the stronger muscle groups is achieved and in the weaker muscles a balance in the working path (lower stroke) created.
BLACKseries is a sister company of absolute BLACK Ltd. It was founded out of the desire to offer an alternative to absoluteBLACK's state-of-the-art products.
BLACKseries products use the same raw materials, manufacturing processes, quality controls and tooth profilings as absoluteBLACK. The difference lies in the overall industrial design, which saves a lot of time for CNC machining, making the products more attractively priced for the end customer.
intended use : MTB, Dirt Jump, DH
Material: 7075 Txxx aluminum
Technology: Narrow Wide
bolt circle diameter : 104 mm (standard)
Attachment: 4-arm spider
Number of teeth: 30, 32, 34 or 36 teeth
Compatibility cranks : all cranks with 104 mm bolt circle diameter (Shimano XT / Zee / Deore / SLX / XTR, Race Face, FSA, E13)
Compatibility Chain: 9x, 10-speed , 11-speed , 12-speed or Singlespeed
Mounting position: inside
chain line : depending on used crank (30Z: -2,5 mm | 32Z: -2,0 mm)
Adjustment options: none
Range (ovalization): not specified
Timing (force introduction):
- 30 teeth chainring equals 28 teeth at dead center and 32 teeth at power zone
- 32 teeth chainring equals 30 teeth at dead center and 34 teeth at power zone
- 34 teeth chainring equals 32 teeth at dead center and 36 teeth at power zone
- 36 teeth chainring equals 34 teeth at dead center and 38 teeth at power zone
Weight by manufacturer: 37g (30 teeth), 46g (32 teeth), 49g (34 teeth), 59g (36 teeth)
Weight weighed by yourself:
1x BLACKseries by ABSOLUTE BLACK chainring oval 1-fold LK 104 | 4 holes narrow wide black
Important: Only the 30 teeth chainring is delivered including all mounting parts!
- On the inner circumference of the chainring is a small mark (triangular).
This mark must sit behind the crank arm.
- When installing the 32 teeth chainring (with integrated thread) at least 6 mm long chainring bolts