TOKEN Shuriken TK1739S2 Oversized Pulley System for Shimano Dura-Ace & Ultegra Di2 12-Speed
SKU code: FES-ERD1739S2-TBT-WHTK
In Stock
The Shuriken TK1739S2 swaps your Shimano 12-speed derailleur's cage and pulleys for a larger 13T/19T set in a 3K carbon cage. Bigger pulleys bend the chain less, cutting friction, while the Conti-Wave lower pulley keeps it quiet.
Highlights
- 13T upper / 19T lower aluminium pulleys with titanium coating
- TBT ceramic bearings
- Matte 3K carbon cage plates
- Conti-Wave tooth profile on the lower pulley for low noise
- 59 g per set
- Five-year TOKEN warranty on Shuriken oversized pulley systems
Why oversized
A larger pulley reduces how sharply the chain articulates around it, lowering friction and improving drivetrain efficiency. TOKEN notes the 19T lower pulley is designed to run as quietly as a plastic pulley.
Conti-Wave tooth profile
Conti-Wave machining puts a continuous chamfer on the tooth edges, cutting the contact area between the teeth and the chain's inner plates by 82.5%. On the lower pulley, where the chain arrives at changing angles, that keeps engagement smooth and chain noise down in every gear.
Maintenance
TOKEN recommends disassembling the system, opening the bearing seals and regreasing the bearings every 2,000 km, and more often after wet or muddy rides.
Compatibility & fit
For Shimano 12-speed Di2 road rear derailleurs: Dura-Ace R9250 / R9270 and Ultegra R8150 / R8170. Drivetrain capacity 16T (chainring) + 23T (cassette); largest cog 34T.
TOKEN suggests starting with your existing chain length; on average two extra links may be needed, so check every gear after fitting and add links or fit a new chain if required.
Check chain length after fitting: correct chain length matters for drivetrain performance and stability, so follow the chain and drivetrain manufacturer's sizing guidance. A small derailleur adjustment may be needed, so check shifting before your first ride.
Pulley fitting and derailleur adjustment are a separate workshop service and aren't included in the price.
TOKEN warrants this product against defects in materials or workmanship for five years from the original date of purchase, for the original purchaser with dated proof of purchase. Normal wear and tear, bearings (unless unused), and damage from incorrect installation, modification, neglect or improper maintenance are not covered; TOKEN repairs or replaces a defective product at its discretion. This is in addition to your rights under the Australian Consumer Law.
For warranty support, return the product to Tune Cycles and we'll manage the claim with TOKEN's Australian distributor.
- Oversized 13T/19T pulleys reduce chain articulation and friction
- TBT ceramic bearings
- Matte 3K carbon cage for a light, rigid build
- Conti-Wave lower pulley for quiet running
- Fits Dura-Ace R9250/R9270 and Ultegra R8150/R8170 Di2
- Five-year TOKEN warranty
| Product code | TK1739S2 |
|---|---|
| Pulley teeth | Upper 13T, lower 19T |
| Bearings | TBT (ceramic) |
| Derailleur brand | Shimano 12-speed |
| Rear derailleur compatibility | Dura-Ace Di2 R9250 / R9270, Ultegra Di2 R8150 / R8170 |
| Drivetrain capacity | 16T (chainring) + 23T (cassette) |
| Largest cog | 34T |
| Cage plate material | Matte 3K carbon |
| Pulley material | Aluminium with titanium coating |
| Weight | 59 g per set |
| SKU | FES-ERD1739S2-TBT-WHTK |
| Brand | TOKEN |
