ZENITH
SHURIKEN TK1739S2
SHURIKEN TK1739S2
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Details
| Bearings | TBT |
|---|---|
| Pulley Wheel | Upper 13T, lower 19T |
| Derailleur Brands | SHIMANO 12 Speed |
| RD Compatibility | Dura Ace Di2 R9250/R9270, Ultegra Di2 R8150/R8170 |
| Drivetrain capacity | 16T (chainring) + 23T (cassette) |
| Lowest (largest) cog | 34T |
| Weight | 59 g / set |
| Plate Material | Matte 3K carbon |
| Pulley Material | Aluminium with titanium coating |
| Colours | Blue Gold Red Matte Carbon Black & White |
| Product Code | TK1739S2 |
The SHURIKEN TK1739S2 features 13T/19T aluminum pulleys with TBT bearings and a 3K carbon cage for a lightweight yet rigid build.
Its oversized design reduces chain articulation and friction, boosting drivetrain efficiency. The exclusive Conti-Wave tooth profile minimizes chain noise and ensures smooth, precise shifting.
Stealth Lube™ is a high-performance lubricant engineered specifically for TOKEN's ceramic pulley bearings.It is formulated with ultra-low viscosity refined base oil that penetrates deeply, reduces friction, and operates cleanly under high RPM and micro-tolerance conditions. Silent in action. Relentless in speed.
What is Conti-Wave?
Conti-Wave machining reduces chain noise by minimizing the contact surface against the chain. The chain enters the rear derailleur at various angles. The Conti-Wave tooth profile, designed for the lower pulley, ensures smooth pulley-and-chain engagement regardless of the gear position. The continuous chamfered form on the teeth's edge reduces the contact area between the teeth and chain inner plates by 82.5%, further increasing efficiency while perfectly guiding the chain.
Q: Do I need to change the chain when installing the oversize pulley?
A: While it may require two extra chain links on average, we recommend initially keeping the original chain length. Once the pulley is installed, carefully try all gears and determine if it's necessary to add extra chain links or use a completely new chain.
Q: How should I maintain the Shuriken Oversize Pulley?
A: We recommend disassembling the Shuriken oversized pulley system, opening the seal, and regreasing the bearings every 2,000km. Consider more frequent maintenance intervals when riding in rainy or muddy conditions
Q: Most alloy pulleys are noisy. How does TOKEN overcome the noise issue?
A: Chain noise primarily originates from the bottom pulley, where the chain enters at various angles. The Shuriken's 19T bottom pulley is designed for exceptionally smooth operation and is as quiet as a plastic pulley.
Q: Would it affect the shifting performance?
A: No. With slight adjustments, the Shuriken oversized pulley system consistently delivers perfect shifts.
Q: Why do some of the TOKEN Shuriken models have the largest pulleys in the market, while others don’t?
A: We understand that larger pulleys experience lower drag due to slower rotation. However, the top pulley has structural limitations. Derailleur designs vary, and each derailleur has a different maximum top pulley size it can accommodate. We believe that sacrificing shifting performance for marginal gains in pulley size isn't worthwhile. Pulley size is just one factor – bearing technology, pulley tooth profile, and surface treatment are equally important. All Shuriken models are designed not only for efficiency but also for optimal shifting performance and easy adjustment.
