Molly Ayala
Shimano's Di2 is an electronic gear-shifting system that offers instant, accurate, and fast shifts at the push of a button. It is available on a range of bikes, including road, mountain, e-bikes, and gravel bikes. The system consists of various components, including shifters, derailleurs, batteries, and wiring, which all work together to provide a seamless riding experience. While Shimano Di2 offers many benefits, it also has some potential drawbacks and complications, such as the need for specific parts and the possibility of technical issues. One such issue is with the Shimano RD9000, where users have reported challenges in achieving smooth and correct shifting. This may be due to factors such as friction in the cable, limit screw issues, or improper cable attachment. To address these issues, riders can refer to online forums, manuals, and videos that offer troubleshooting tips and adjustments to optimize their shifting experience with the Shimano RD9000.
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What You'll Learn
Shimano Di2: instant, accurate, lightning-fast shifts
Shimano Di2 is the company's version of electronic shifting, standing for "Digital Integrated Intelligence". It offers instant, accurate, and lightning-fast shifts at the push of a button. Even in extreme conditions, Di2 provides precise and controlled shifts. The system allows for gear changes even under heavy load while climbing or accelerating. Once set up, Di2 runs smoothly without the need for re-indexing or shift cable replacement. It is available on a range of bikes, including road, mountain, e-bikes, and gravel bikes.
To achieve smooth shifting with Di2, micro-adjustments can be made to the rear derailleur. This involves first fine-tuning the guide pulley distance by adjusting the end adjust bolt, ensuring the chain doesn't get jammed. The rear derailleur is then shifted to the smallest sprocket to check for any slack in the chain, which can be eliminated by further adjustments. Entering adjustment mode allows for fine-tuning without changing gears.
Di2 systems require additional components for setup, including a battery and wiring. A Junction A box or E-tube Di2 handlebar mount is needed for charging, along with a bottom bracket junction for internal wire routing. An E-Tube wireless unit provides customisation options for the Di2 system.
AUTO SHIFT technology is available on e-bikes equipped with specific drive units, utilising sensors to record data from the pedal, crank, and motor in real time to determine the optimal gear. This technology allows riders to focus on their natural riding experience without compromising enjoyment. The E-TUBE PROJECT Cyclist App provides recommended settings and fine-tuning options for AUTO SHIFT, including "Shift timing" and "Climbing response".
While Shimano Di2 offers precise and fast shifting, there have been reports of issues with the RD9000 model, including erratic shifting and cable friction. These problems may be resolved by checking the frame, cable routing, and limit screws, as well as ensuring proper cable seating and tension.
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Shimano's RD9000: erratic shifting
Shimano's RD-9000 is a high-performance electronic shifting groupset, but some users have experienced erratic shifting issues. Here are some tips to address these problems:
Firstly, check for any loose connections or broken parts. Ensure that the frame's replaceable dropout isn't loose, as this can cause erratic shifting. Check for a loose or broken cable stop and ensure the cable head is seated correctly in the shifter. It's also worth checking that the cable is attached to the correct position at the RD; refer to Shimano's drawing for the correct setup.
If the above issues are not the cause, the problem could be internal cable friction or entanglement. Try swapping the rear shifter for another one to see if the issue persists. If the problem is with cable friction, consider switching to a different cable type, such as Gore cables, to reduce friction and improve shifting performance.
Additionally, you can try micro-adjusting your rear derailleur. This process involves fine-tuning the derailleur's position relative to the sprockets and making adjustments to the high/low limit screws. Refer to the Shimano manual for specific instructions on micro-adjusting your derailleur.
If you're experiencing issues with upshifting, the problem could be dirty inner cables or housing. Try lubricating or replacing them to see if that improves shifting performance.
Finally, if you're using a Shimano electric 9000 groupset, you can adjust the AUTO SHIFT settings to match your riding style and preferences. The E-TUBE PROJECT Cyclist application allows you to customize "Shift timing" and "Climbing response" to fine-tune when and how easily the bike shifts gears.
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Shimano's RD9000: limit screw issue
Shimanos RD-9000: limit screw issue
Limit screws are used to adjust the range of the rear derailleur, preventing it from shifting to positions that don't contain a sprocket. The Shimano manual states that for Di2, micro-adjustment fine-tuning should be done before setting up the limit screws. If you have already set up the limit screws, you can still make adjustments to the rear derailleur.
Limit screws are typically adjusted with a screwdriver, but Shimano limit screws use JIS screws, which require a JIS screwdriver. It is important to use the correct type of screwdriver to avoid damaging the screw head. In some cases, a hex key may be needed for adjustments.
When adjusting the limit screws on a Shimano RD-9000, it is important to follow the recommended procedure. According to the manual, the B Gap should be set when the bike is on the little ring and the biggest sprocket. The B Gap should be adjusted to minimize rubbing or noise when backpedalling, ensuring that the top jockey wheel is as close as possible to the largest sprocket.
Additionally, the guide pulley distance should be adjusted by turning the end adjust bolt to move the guide pulley closer to the sprocket without causing the chain to jam. The chain should also be checked for slack when mounted on the smallest chainring and smallest sprocket, and the end adjust bolt should be adjusted accordingly.
By following these steps and adjusting the limit screws, you can optimize the performance of your Shimano RD-9000 and ensure smooth and precise shifting.
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Shimano's RD9000: noisy shifting
Noisy shifting in Shimanos RD-9000 could be due to a variety of reasons. Firstly, it could be because of an old derailleur and an old cassette. Replacing both can greatly reduce the noise level. Another reason could be that the chain is too short, causing the derailleur to be stretched on the large ring and sprocket, which is where the noise is the worst. This can be rectified by not cross-chaining, as many setups will be noisy when cross-chaining since the chain line is at its most extreme.
Additionally, the noise could be due to the combination of a mechanical groupset and poor tolerances. Upgrading to a better groupset, such as the 9100RD, can help resolve this issue. It is also important to ensure that the derailleur alignment is correct. If the derailleur is outside of its B-tension adjustment, you can adjust the B-adjustment screw to bring it back into the optimal range.
If you are experiencing noisy shifting with Shimano's electronic Di2 system, there are a few adjustments you can make. Firstly, ensure that the guide pulley distance is adjusted correctly. Turn the end adjust bolt to move the guide pulley closer to the sprocket, but not so close that the chain gets jammed. Additionally, you can enter the adjustment mode and use the buttons on the shift lever to fine-tune the rear derailleur's position. Finally, adjust the high and low stopper bolts to ensure smooth shifting.
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Shimano's RD9000: cable binding
The Shimano RD-9000 is a cable-adjusting unit for bike derailleurs. It is a genuine Shimano replacement part, which can be purchased for £3.99. The RD-9000 cable adjusting unit replaces the old unit of the same type, or the ones that come on new Shimano derailleurs.
One user review states that they always replace the units on new derailleurs because the new design is "a total engineering failure and not even close to as good as the old design". Another review states that they replaced their Shimano Ultegra r8000 with the RD-9000 and it "started working again".
The RD-9000 cable adjusting unit is compatible with the Dura-Ace 9000-series rear derailleur.
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Frequently asked questions
Shimano's electric 9000 is a Di2 groupset, which stands for "Digital Integrated Intelligence". It is Shimano's version of electronic shifting. To shift a Shimano electric 9000, you can either shift manually or use the automatic AUTO SHIFT technology.
To shift a Shimano electric 9000 manually, you can use the buttons on the shift lever. Press the shifting button X to move the rear derailleur towards the inside (larger sprocket). While turning the crank/front chainring, keep moving the rear derailleur towards the 4th largest sprocket until it makes a slight noise. Then, press the Y button four times to move the rear derailleur back towards the 11T.
AUTO SHIFT is available for e-bikes equipped with an EP600 or EP801 drive unit. To set up AUTO SHIFT, you can use the E-TUBE PROJECT Cyclist application or the E-TUBE PROJECT Professional for Windows. The application allows you to fine-tune the settings to match your preferences. The two key settings that affect the AUTO SHIFT experience are "Shift timing" and "Climbing response".
