We Value Efficiency As Much As You Do
We all know that the rear derailleur is the key component that differentiates drivetrain performance the most. The best shift precision and durability can only be found on the very top models, regardless of their generation. The new Shuriken TK1729R7 is designed to break the rule. It brings not just efficiency, but also dramatically improves shifting precision and durability, thanks to the smooth bearings and purpose-specific tooth profile that can be found on all Shuriken pulleys. The bearing in the top pulley, which spins faster, is a TBT ceramic, adding smoothness where it really matters. It's even lighter than a stock long cage with plastic pulleys. Sounds interesting, doesn't it?
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.
Q: Are the Shimano versions of the Shuriken oversize pulley system (such as TK1729S and TK1729R7) compatible with Shimano's older generation derailleurs?
A: No. Current Shimano road derailleurs structurally differ from older generations, and the derailleur cage is not interchangeable.
Q: Are the Shimano versions of the Shuriken oversize pulley system (such as TK1729S and TK1729R7) compatible with the Ultegra RX derailer with the clutch?
A: No, the Ultegra RX is more MTB-oriented in design. Many parts are distinct from road models. Despite its name, the Ultegra RX could be considered "pre-GRX."
|Upper 12T, lower 19T
|16T (chainring) + 23T (cassette)
|Lowest (largest) cog
|71.5 g / set
Embrace your inner ninja with the Token Shuriken Oversized Pulley