EDS GeX Electronic Rear Derailleur

Powered by an 800mAh built-in rechargeable battery, the GeX delivers approximately 20,000 shifts per charge — months of riding between top-ups for most riders. The magnetic snap-on charging connector makes top-ups effortless — no exposed port, no cover to lose. The IP67-rated sealed housing keeps mud, water, and grit out at all times. It ships already configured to 12-speed, dialed in for the cassette included in this bundle. Operating temperature -20°C to 60°C.

Internal Chain Damper

A precision-engineered damping system suppresses chain slap and prevents dropped chains on rough roads, broken tarmac and mixed surfaces — keeping your drivetrain quiet and controlled when the going gets rough.

93mm Long Cage

This bundle ships with the long-cage version of the GeX rear derailleur, which handles cassettes up to 52T — the right cage for the wide-range cassette included below.

Hydraulic Braking. Electronic Shifting. One Lever.

Shift up or down with a button press — the derailleur responds with zero cable lag. The hydraulic circuit delivers powerful, modulated stopping power running on mineral oil, matched to the RA7800 calipers included in this bundle. The lever body is high-grade cold-laminated carbon fiber — visibly lighter and stiffer than the previous aluminum alloy version, a free upgrade at no extra cost. Lever reach is adjustable up to 8mm. IP65 rated against water jets and dust.

Carbon Fiber Body — Light, Stiff, Precise.

The carbon fiber lever body is high-grade cold-laminated carbon fiber. The woven surface texture holds grip through wet descents without repositioning. The shift button sits exactly at thumb reach: index finger pulls the brake lever, thumb taps the shift button — no hand movement required.

One Lever, Two Functions.

Brake and shift from the same contact point. The lever body handles the brake pull, the button handles the gear command — both without taking your fingers off the bar.

Forged Arm, 3-Bolt Direct-Mount Ring

The EVOSID SL1 crank arms are forged aluminum alloy, CNC-machined into a one-piece structure for high stiffness and crack resistance under hard pedaling. The chainring is a separate 7075 aerospace-grade aluminum alloy piece, using a 3-bolt direct-mount interface (T25 Torx bolts). Runs on a SRAM DUB-standard 28.99mm spindle. Available in black or silver.

Spider-Web Pattern, Milled for a Reason

The chainring face is CNC-milled into a radiating spider-web pattern rather than left as a flat disc — removing material where it isn't structurally needed cuts weight while the ribbed pattern reinforces the areas that carry pedaling load. It's a look you'd normally only find on higher-end race cranksets.

46T / 48T / 50T

Three chainring sizes to choose from — a smaller ring for more manageable gearing, a larger ring for a taller top-end on flatter routes. The closed-disc profile also keeps loose clothing and cables away from the chainring.

Fewer Bolts, Faster Swaps

Just 3 T25 Torx bolts hold the chainring to the spider — the factory quotes roughly 40% faster installation than a traditional multi-bolt design, so swapping between the 46/48/50T options takes minutes, not a full workshop session.

Threaded Bottom Bracket, Cups Included

The crankset ships with its matching EVOSID BC1.37"×24T (BSA/English threaded) bottom bracket. Overall width is 90mm and it accepts bottom bracket shells from 68mm up to 73mm wide, with included spacers (two 2.6mm gaskets, a 3mm spacer, and a 4.5mm spacer) to take up the difference. Threading directly into a standard threaded shell also avoids the creaking that press-fit bottom brackets are known for.

Is Your Frame Compatible?

As long as your frame's bottom bracket shell is BSA (English thread) between 68mm and 73mm wide, this bottom bracket installs without any issue. It is not a press-fit design.

Fully Hollow Plates. Flat-Top Profile.

The CHOHO Z12-DSL is a dedicated 12-speed chain with fully hollowed-out plates and a flat-top profile, cutting weight without giving up strength. The inner and outer plates are chrome-treated for wear resistance and finished in silver, and the chain comes pre-lubricated with FUCHS grease. Supplied at 120 links with the 11-45T cassette, or 128 links with the 11-50T cassette for the extra length a 50T cog needs — trim to fit your frame during installation.

Ceramic Pistons. Unibody CNC Body.

The RA7800 caliper body is machined from a single aluminum block — no seams, no flex under hard braking. Twin 21mm ceramic pistons deliver excellent heat resistance and a consistent bite point across long descents. A unidirectional oil circuit ensures smooth, progressive lever feel from light modulation through to full stop. Compatible with 140mm and 160mm rotors.

Shimano Pad Compatible

Compatible with Shimano L04C, L05A, L04A, BR-RX810, and IIPRO-GLYS brake pads — widely available worldwide and easy to source at any bike shop.

Flat Mount. Pre-Bled. Ready to Ride.

Flat mount only — the standard on modern road and gravel disc frames. Hoses are pre-cut and pre-bled from the factory: 900mm for the front, 1,550mm for the rear. Unbox, install, ride. The mineral oil system is non-corrosive and easy to maintain at home.

Pair Your Components

Three Components, One Clean View

Rear derailleur, left brake-shifter, and right brake-shifter — all three show live charge level on the same home screen before every ride.

Cassette Speed — Pre-Set, Adjustable Anytime

Not Locked to One Speed Count

Unlike a mechanical derailleur built for one fixed speed, EDS GeX is fully configurable — reconfigure it for a different speed count whenever your setup changes.

Run Initial Calibration

Guided On-Screen Alignment

No guesswork — use the on-screen +R / −L controls to nudge the guide pulley until it sits precisely under the smallest sprocket, then tap Finish.

Fine-Tune Every Gear

Need to Go Further?

Open Rear Derailleur Gear Parameters to view or manually edit the exact position value for any gear, then save — a level of precision cable systems simply can't match.

Set It Once, Ride Your Way

Reassign either lever's buttons to trigger whichever shift function feels natural, or tap Factory restore to reset instantly.

Live Stats While You Ride

Tap GO in the bottom bar to switch into the ride screen, where elapsed time, calories, pace, average heart rate, cumulative shifts, and climb update in real time alongside turn-by-turn map navigation.

Stay Current, Wirelessly

Tap Update now, then watch the transfer progress on screen — just make sure the component has enough charge before you start.