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Shimano Alfine SG-S7051 11-Speed Di2 Internal Hub Gear
- In stock On the shelf in our own warehouse. Order before 2pm and it is despatched the same working day; bikes we build are built, safety-checked and despatched in 2-3 working days.
- In stock with our supplier Not on our shelves, but our supplier has it or it is already on its way to us. We bring it in as soon as you order, and the despatch estimate shown allows for that.
- Out of stock Neither we nor our supplier has it right now. Where a date is shown, more is on order and you can order now to secure one from that delivery.
- Stock to be confirmed Not on our shelves, and our supplier does not send us stock figures for it, so we cannot say how soon we could get one. Use "Check availability" and we will ask them and email you back.
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About Shimano
Shimano is a Japanese multinational corporation synonymous with cycling. Constituting 50% of sales in the global cycling market, and with their parts spanning across all types of bicycle, it is a highly reputable business that is constantly developing and innovating its assets.
Details
The Alfine 11 speed Di2 specification internal gear hub runs on needle bearings for increased durability and high drive efficiency.
The Shimano Alfine S7051 hub offers a wide 409% gear range actuated by Shimano Di2 electronic shifting and an improved internal structure for better gear engagement. It is approved for E-Bike and non E-Bike use and is available in black and silver.
Technology
Power Modulator
As for the front roller brake, the braking Power Modulator system is built in the hub side to ease sudden lever power input for easy and stable braking control. The braking system is especially user-friendly for beginners.
Centre Lock
The Centre Lock system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.
Features
- Helical internal sprockets increase durability, perform better with high torque loading and provide a constant engagement for a smooth and quiet operation
- Oil bath lubrication system increases durability and reduces friction in the hub, while Labyrinth seals improve sealing performance both resulting in extending service life
- Double roller silent clutch engagement also gives a smoother quieter shift
- Top normal internal structure for improved tolerance when shifting while riding under load
- Alfine hubs use pedal power to aid down-shifting resulting in fast and accurate shifts with an exceptionally light feel
- Shimano's precise manufacturing abilities have enabled them to construct the Alfine internal hub to be there most efficient yet
- 409% gear ratio
- Centre-Lock disc rotor compatible
- 135mm O.L.D. spacing
Specifications
- Weight: 1670g
