Electric bike rear derailleur Black Friday

Which rear derailleur for an electric bike?

A rear derailleur only works with its shifter, cassette, and chain: the same number of speeds, and even the same standards, Hyperglide+ or LinkGlide from Shimano. On an electric bike, two points weigh more heavily. The cage must accept the large sprockets of very wide-range cassettes, which compensate for the motor's gear ratios. Also, some electronic derailleurs draw power from the bike's battery: the RD-M8260 from Shimano, the e-bike version of the XT Di2, uses it to shift gears without pedaling or automatically, with a compatible system.

A derailleur on promotion: three checks before ordering

• The family: the label indicates the speeds and sometimes the standard, like the 11L suffix of the RD-M8260-11L, the LinkGlide 11-speed version of the XT Di2 from Shimano.
• The cage: GS, medium, or SGS, long, from Shimano; it determines the largest sprocket accepted.
• The mounting: most derailleurs are screwed onto a hanger, but Sram T-Type models mount directly to the frame, which must be compatible UDH.

With these three points clarified, the discount applies to just one reference: the RD-M8260 in 12 speeds and its 11L version are not the same product, and the crossed-out price of a long cage cannot be compared to the listed price of a medium cage.

What the page includes

The listing mainly features MTB and road derailleurs, Deore XT, XTR, Ultegra, Eagle, and XPLR, as well as spare parts: screws, pulleys, lever housing. The MTB models can be found in the MTB rear derailleurs in Black Friday, all practices gathered in the rear derailleurs of the operation. A new derailleur adjusts badly with a worn transmission: check the cassettes and the electric bike chains in Black Friday. For the rest of the year, the page for city bike derailleurs also presents derailleur hangers; once Black Friday has passed, consider the clearance and the new arrivals.

Which derailleur brands during the promotion?

Box Components has designed its Box One and Box Two derailleurs for its Prime 9 transmission, with nine speeds and a cassette up to 50 teeth, usable on an electric bike.

Sram offers Eagle derailleurs for MTB and XPLR for gravel, along with T-Type models without a hanger, mounted directly on the frame.

Shimano presents the XT Di2 RD-M8260 for electric bikes, in 12 speeds Hyperglide+ or 11 speeds LinkGlide, wired to the bike's battery.

Frequently Asked Questions

When do derailleurs go on Black Friday?

On the calendar, Black Friday occupies just one day, the Friday after Thanksgiving. Promotions from Vélo-Store on derailleurs, however, extend beyond this day and accompany the entire month of November.

Medium or long cage: which one to choose?

The one that can accommodate the largest sprocket of your cassette and the gap between your chainrings. A very wide-ranging cassette, often found on electric bikes, generally requires a long cage.

Does an electric bike Di2 derailleur have its own battery?

Not the RD-M8260: it is connected to the bike's battery. The standard XT Di2 version, the RD-M8250, on the other hand, comes with its removable battery.

How to adjust a rear derailleur?

The limit screws restrict its travel towards the smallest and largest sprocket, while the cable tension knob aligns the chain on each sprocket. On an electronic model, the adjustment is done through the shifter or the manufacturer's app.

How to compare two offers on a derailleur?

By the same reference: same number of speeds, same standard, same cage. Also check what is included, especially for an electronic model, and compatibility with your frame.