Carbon Fiber Hollow Oversized Pulley Cage

Driven by a built-in 800mAh rechargeable battery at 8.4V, the EDS TX rear derailleur shifts instantly on a button press — zero cable lag, zero stretch over time. It ships already configured to 11-speed, dialed in for the cassette included in this bundle. The 12-tooth oversized pulley wheels are carbon fiber hollow construction (more on why that matters below). Charges through a magnetic Pogopin connector — snap it on, no port covers, no corrosion.

Pre-Matched to This Bundle's 11-Speed Cassette

No app setup required for speed count — just pair the derailleur to the WHEELTOP app for calibration and you're ready to ride.

Why Oversized? The Chain Wrap Angle Difference.

At 12 teeth, the oversized pulleys are physically larger than a conventional jockey wheel — letting the chain bend through a gentler arc at each engagement. Less arc per revolution means less per-link articulation friction across every pedal stroke, and the hollow carbon fiber construction keeps the added size from adding meaningful weight.

Carbon Fiber Body. Rim Brake Compatible.

The TX shift lever unifies electronic gear control with a mechanical rim brake in one ergonomic lever body. Shift up or down with a button press — the derailleur responds with zero cable lag. The lever pairs with the MEROCA calipers included in this bundle via standard caliper cable pull — no hydraulic lines to bleed, just cleaner cockpit routing and instant gear response.

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.

SUMC SX11 — 116-Link 11-Speed Chain

A dedicated 11-speed chain built with SUMC's double-X outer plate profile for smoother shifts under load and a slight friction reduction over a generic chain. Supplied at 116 links (standard length, trim to fit your frame during installation) and finished in silver to match the rest of the drivetrain hardware.

11-28T

11-12-13-14-15-17-19-21-23-25-28T · 307.6g

Tight steps between gears for flat-to-rolling roads where you want to hold a precise cadence.

11-32T

11-12-13-15-17-19-21-23-25-28-32T · 365g

A well-rounded middle ground — enough range for rolling terrain without giving up too much on the flats.

11-34T

11-12-13-15-17-19-21-23-25-28-34T · 377g

A genuine bail-out gear for hillier routes or riders who'd rather spin than grind — the natural pick for a 1X single-chainring build.

Aluminum Alloy Body. Dual-Pivot Balance.

The BR-R7000 caliper body is aluminum alloy, lightweight with high rigidity — the arm doesn't flex or deform under hard braking, so lever force translates directly into stopping power. A dual-pivot balanced structure keeps both brake arms applying force in sync, transmitting braking power evenly with no fishtailing under a hard stop and no fade on long descents.

High-Rebound Return Spring

A high-rebound spring keeps lever response and return fast for a direct, controlled feel — fine-tune brake force to reduce lock-up and rim-rub risk on technical descents.

Adjustable Pads. Anti-Squeal Compound.

Each brake pad is adjustable — 47mm of range at the top, 70mm at the bottom — for precise alignment to the rim's braking surface and easy compensation as the pads wear. The pad compound itself is a low-noise, wear-resistant formula with a widened mud/sand channel, cutting down on the high-frequency resonance that causes brake squeal.

Per-Gear Fine Adjustment

Dial in every sprocket individually. If one gear feels off, adjust it directly in the app without touching the bike — a precision that cable systems simply can't match.