- Digital Integrated Intelligence or Di2: with programmed automatic motion at the touch of a switch the Dura-Ace Di2 rear derailleur is quick, smooth and effortless, making for unmatched drivetrain efficiency
- The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devises and replaces the handlebar junction
- Button on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirements
- Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift
- Synchronized Shift designed, developed to choose the next biggest or lowest gear ratio irrespective of whether a gear change needs to be made by the front or rear derailleur
- The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching
- Low profile Shadow derailleur design
- Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts
- 11-34T wide gear ratio capacity will cater for compact setups as well as the traditional road double
- Full carbon fibre inner and outer pulley plates enhance rigidity and reduce weight
- Titanium B axle bolt for further weight savings
- High tolerance cold forged aluminium link plates and body construction is extremely light and durable
- Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting
- Pulleys are made of tough DuPont Zytel for longer life and less chain noise
- 12-speed E-tube Di2 compatible
Shimano Dura-Ace
Black Rd-R9250 Dura-Ace Di2 12-Speed Rear Derailleur E-Tube
- SKU: RDR9250
Delivery
We want to make sure you choose the right product so if you are not sure about anything or want further information or advice on what to buy, please chat to us first. Your usual statutory consumer rights apply on all goods, you can send them back if in an original condition within 30 days for a full refund. All returns must be paid for by the customer unless it is a genuine error of Bike Boom or a warranty issue. Some card issuers take days to put the money back into your account and Paypal can take up to a month.
Expect your delivery to arrive between 3-5 days. You should receive tracking information as soon as your order is fulfilled. We use many different couriers depending on the size, weight and value of the goods being sent. We may decide to send your order in separate packages and at separate times to get those items out to you quicker. We are only a small company and can be easily overwhelmed so please be patient if we haven't met our delivery target. We are human beings so give us a call on the telephone to get an update on your delivery if things are delayed 01273 905920, we are here to help.
Returns
We want to make sure you choose the right product so if you are not sure about anything or want further information or advice on what to buy, please chat to us first. Your usual statutory consumer rights apply on all goods, you can send them back if in an original condition within 30 days for a full refund. All returns must be paid for by the customer unless it is a genuine error of Bike Boom or a warranty issue. Some card issuers take days to put the money back into your account and Paypal can take up to a month!