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WHEELTOP EDS OX 2.0 MTB Wireless Electronic Groupset 4-Piston Disc Brake 3-14s

Wireless Electronic MTB Groupset + Hydraulic Disc Brake Kit

WHEELTOP EDS OX 2.0 Rear Derailleur & Shifter + 4-Piston Hydraulic Disc Brake Bundle

Everything you need to convert your mountain bike to wireless electronic shifting and powerful hydraulic braking in one order. This kit pairs the WHEELTOP OX 2.0 wireless electronic rear derailleur and shifter with a matched WHEELTOP EDS 4-piston hydraulic disc brake set — caliper, lever, hose, and Post Mount hardware included. One supplier, one box, two systems that are built to work together.

What's Inside the Kit — Shifting

Rear Derailleur & Shifter — Built for the Trail

Wheeltop OX2.0 rear derailleur

New OX2.0 Electronic Rear Derailleur

Equipped with a high-capacity integrated battery, the OX2.0 delivers exceptional endurance - capable of executing up to 24,000 gear shifts on a single charge. The magnetic snap-on charging connector makes top-ups effortless. A windowed protective cover shields the motor from all angles, while the IP67-rated sealed housing keeps dirt and water out, ride after ride.

Adjustable Chain Stabilizer

A precision-tensioned chain stabilizer suppresses chain slap and prevents dropped chains on rough terrain. The full aluminum alloy construction keeps the body rigid under load - reliable whether you're cruising fire roads or hammering technical singletrack.

Button-Style Shifter

Clean, minimal design with a satisfying mechanical-keyboard-style click. Shift up or down instantly - the derailleur responds with zero perceptible delay. IP67-rated dust and water resistance means it handles rain rides and post-ride washdowns without a second thought.

Feel

Mechanical Click

Crisp, tactile feedback on every press

Response

Zero Lag

Instant derailleur actuation, no cable pull

Weather

IP67 Sealed

Rain-proof, wash-proof, mud-proof

Battery

CR2032

Tool-free coin cell swap, years of life

Wheeltop OX2.0 shifter mounted on flat handlebar close-up

CR2032 Battery — Replaced in Seconds, No Tools Required.

The battery compartment cover sits on the back of the shifter body. To swap a cell, simply take a fresh CR2032, press it flat against the cover, and rotate — the cap threads off cleanly with nothing but finger pressure. No screwdriver, no coin, no dedicated tool. Drop in the new cell, twist the cover back on, and the shifter responds immediately. Standard CR2032 cells are available at any supermarket, gas station, or electronics shop worldwide.

The New Battery Is the Only Tool You Need.

No coin slot, no Phillips head, no prying. Press the fresh CR2032 flat against the cap and twist — it comes off with finger pressure alone. Your replacement part doubles as the removal tool.

Wheeltop OX2.0 shifter battery compartment cover back detail
Long-Term Maintenance

Serviceable 800mAh Main Battery

Wheeltop OX2.0 derailleur battery compartment and label detail

Detachable, User-Replaceable Main Battery.

The main battery isn't fixed in place for good — it's held to the derailleur body by 4 screws. Undo them, and a fresh battery drops straight in. One charge gets you 20,000+ shifts.

800mAh 7.4V 2A 5.92Wh

How Long Does a Charge Last?

A pro rider covering 200km a day can expect around 10 days per charge. An average rider doing 20km a day can go over a month. Actual runtime depends on shift frequency and riding conditions.

Use a Precision 2mm Hex Key.

These are small screws. A loose or low-quality hex key can strip them — a precision 2mm hex key (the kind used for RC/hobby models) fits cleanly and keeps the screw heads intact.

Smart Control

Full Control from Your Phone

Download the WHEELTOP app to pair, tune, and monitor your drivetrain - all from your handlebars.

WHEELTOP app main screen

Everything You Need, Right in the App

Install the WHEELTOP app on iOS or Android. Connect over Bluetooth, and you have instant access to gear position, battery level, riding data, firmware updates, and full after-sales support - all in one place.

Live Riding Data

Speed, cadence, heart rate, mileage, and ride time displayed in real time

Battery & Shift Count

See remaining charge and total shift cycles at a glance

OTA Firmware Updates

Push updates wirelessly - performance improvements without cables or tools

WHEELTOP app Standard and Racing Mode

Two Riding Modes. One Tap to Switch.

Switch between Standard and Racing mode directly in the app. Each mode is tuned for a different riding style - no tools, no hassle.

Standard Mode

Auto-sleep when idle. Lower power draw, longer battery life. Perfect for long days in the saddle.

Racing Mode

Always-on, maximum responsiveness. Boosted signal power for noise-resistant shifting under pressure.

WHEELTOP app calibration screen

Pair, Calibrate, Fine-Tune - All in the App

Use the WHEELTOP app to pair your derailleur, run initial position calibration, and micro-adjust each individual gear. No limit screws to guess at - just tap and confirm.

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.

What's Inside the Kit — Braking

WHEELTOP EDS 4-Piston Hydraulic Disc Brake

WHEELTOP EDS 4-piston hydraulic disc brake full kit flat lay
WHEELTOP BR-MA3000 4-piston caliper with cooling fins

BR-MA3000 Caliper — 4-Piston, Dual-Side Braking

CNC-machined from a single billet of 6061 aluminum alloy, the BR-MA3000 caliper drives four opposed pistons — two per side — for strong, even clamping force. Integrated cooling fins pull heat away from the pads on long descents, keeping braking consistent instead of fading. Runs on mineral oil and is compatible with 140/160/180/203mm rotors from 1.8mm to 2.2mm thick.

Tested to 120°C / -20°C, 100,000 Cycles

Each caliper passes fatigue testing across temperature extremes and 100,000 braking cycles before it ships — built to hold up through summer heat and winter cold alike.

Design

CNC One-Piece

Machined from a single billet, no welded seams

Weight

125 ± 5g

Light for a 4-piston caliper

Cooling

Finned Body

Reduces heat fade on long descents

Fluid

Mineral Oil

Stable performance, easier maintenance

BL-MA3000 Lever — Left/Right Interchangeable

A vertical reservoir design routes the hose internally for a clean cockpit and compact footprint on the bar. The 2-finger lever body and bearing-connected pivot give a smooth, consistent pull. Both levers in the kit are identical — mount either one on the left or right, whichever suits your setup.

Grip

2-Finger

Short-throw lever blade

Clamp

Φ22+0.2mm

Standard MTB handlebar diameter

Weight

92 ± 5g Each

High-strength aluminum alloy body

Cross-Compatible

BR-M3000 / RA7000 Series

Also works with BR-RA7800/7801/7900 calipers

WHEELTOP BL-MA3000 brake lever swivel hose joint detail

Swivel Joint — Not a Loose Screw

The hose connects to the lever through a rotating swivel joint, letting you fine-tune the hose routing angle to match your frame and hand position. If it feels like it can turn, that's the design working as intended — do not try to tighten it with a screwdriver. Forcing it can damage the joint and is not covered under warranty.

Fitment

Hose Length & Mount Type

Confirm your frame's caliper mount type before ordering — this brake is built for direct-mount (Post Mount) MTB frames only.

WHEELTOP BL-MA3000 brake lever pair with hydraulic hose attached
Front Hose

90cm

Pre-cut length for standard MTB front-fork routing.

Rear Hose

160cm

Pre-cut length to reach the rear caliper along the frame.

✓ Direct-Mount (Post Mount) Frames

This is what mountain bike frames and forks use. The included 180FP-M Post Mount adapters (stamped with a 9N·m torque spec) bolt straight to these tabs.

✕ Flat Mount Frames

Common on road/gravel frames. This caliper does not fit Flat Mount tabs — do not order this kit if your frame uses Flat Mount.

Wireless IP67 Waterproof Built-in Battery App Control 4-Piston Hydraulic Mineral Oil Post Mount CNC Aluminum OTA Firmware Update
IP67
Derailleur dust-tight · 1m submersion
24,000
Shifts per full charge
4-Piston
Dual-side caliper design
100K
Brake fatigue-cycle rating
Technical Details

Specifications

Full technical breakdown of the OX 2.0 wireless electronic shifter/derailleur and the matched 4-piston hydraulic disc brake set.

Brand
WHEELTOP
Kit Contents
EDS OX 2.0 Wireless Electronic Shifter/Derailleur + WHEELTOP EDS 4-Piston Hydraulic Disc Brake Set
Application
Mountain Bikes with Post Mount (direct-mount) disc brake tabs
Speed Range
3-14 Speed (configurable in app)
Cassette Compatibility
10-52T (93mm Long Cage)
Derailleur Material
Aluminum Alloy
Wireless Protocol
BLE + ANT+  pairs with cycling computers, displays gear and battery
Derailleur Battery
800mAh built-in lithium · 7.4V · 5.92Wh
Shifter Battery
CR2032 coin cell
Shifter/Derailleur Protection
IP67 - dust-tight, 1m submersion up to 30 min
Shifter/Derailleur Weight
Rear Derailleur 397.5g · Shifter 70g
Cage Version
93mm (Long) — fixed, this listing does not include other cage lengths
Brake Model
Caliper BR-MA3000 · Lever BL-MA3000
Brake Type
4-Piston Hydraulic Disc Brake, dual-side (2 pistons per side)
Brake Fluid
Mineral Oil
Rotor Compatibility
140mm / 160mm / 180mm / 203mm, 1.8mm-2.2mm thickness
Caliper Material
6061 Aluminum Alloy, CNC one-piece machined
Caliper Weight
125 ± 5g
Lever Clamp Diameter
Φ22+0.2mm
Lever Weight
92 ± 5g each
Mount Type
Post Mount (direct-mount MTB frames only) — not compatible with Flat Mount
Adapter Torque Spec
180FP-M Post Mount adapter, 9N·m (marked on part)
Hose Length
Front 90cm · Rear 160cm (pre-cut, shipped unassembled)
Brake Fatigue Rating
Tested at 120°C / -20°C, 100,000 use cycles
Modular Design

Replaceable Derailleur Cage

The cage plate is secured by hex socket screws — swap it in minutes with a 3 mm hex key. Use a professional-grade precision hex key (RC / model aircraft type recommended) — a cheap or worn key will strip the small screws instantly. Change cage length, replace a damaged cage after a crash, or upgrade when new cage options become available.

OX 2.0 replaceable derailleur cage

Trail Crashworthy

Bent cage after a rock strike? Replace just the cage — not the whole derailleur. Far more cost-effective than replacing the entire unit.

Fixed Configuration

This listing ships the 93mm long cage as standard — no selection needed at checkout.

Fixed Configuration

93mm Long Cage — Built for Mountain Bike Cassettes

This listing has no variants — every order ships as one bundle (derailleur + shifter + 4-piston hydraulic disc brake set) with the 93mm long cage, ready for wide-range mountain bike cassettes up to 52T. No selection needed at checkout.

OX 2.0 93mm long cage rear derailleur for mountain bikes
93mm Long Cage

10 – 52T

Cassette Compatibility

Built for mountain bikes running single-chainring, wide-range cassettes. Handles up to 52T with confident chain wrap and tension.

Confirm your largest sprocket is 52T or smaller before ordering. This listing does not include the 75mm or 58mm cage versions.

Package Contents

What's in the Box

Shifting

×1

OX 2.0 Wireless Electronic Rear Derailleur

×1

Wireless Button-Style Shifter

×1

Magnetic Charging Cable

×1

Type-C Adapter

×1

Special Tailhook Backup Washer

×1

User Manual / Quick-Start Guide

Braking

×1 Pair

BR-MA3000 4-Piston Calipers (front + rear)

×2

BL-MA3000 Hydraulic Brake Levers (left + right, interchangeable)

Pre-Installed

Cooling-Fin Brake Pads

×2

180FP-M Post Mount Adapters

×3

Brass Hose Olives

×3

Insert Pins

×3

Hose Compression Fitting Bolts

×4

Caliper Mounting Bolts

Before You Order

Compatibility & Buyer Notes

Please review the following before purchasing to ensure correct fitment.

UDH Frames: Mounts on the Existing Hanger, No Extra Parts

This is a standard hanger-mount derailleur, not a hangerless direct-mount like SRAM Transmission — so if your frame uses a UDH hanger, leave it in place and bolt the derailleur straight onto it, no adapter needed. WHEELTOP lists UDH frames as "partially compatible" because on a small number of frames, the derailleur body can lightly interfere with the frame near the smallest cog. After installing the chain, shift to the smallest cog and check by hand for any rubbing before fine-tuning limits in the app.

1x Drivetrain Only

Designed for single-chainring setups. Not compatible with double or triple chainring systems due to direct-mount structure.

Post Mount Frames Only

This caliper is designed for direct-mount (Post Mount) mountain bike frames and forks. It does not fit Flat Mount road/gravel frames — confirm your mount type before ordering.

Ships as Separate Components

The brake lever and hose ship unassembled from the caliper. Routing the hose and connecting the fitting is a specialized process — we recommend having it installed and bled by a professional bike shop.

Brake Pads Are a Wear Item

The brake set carries a 1-year warranty; brake pads are a consumable wear part and are not covered. Check pad wear regularly, and check for low fluid or air in the line — top up mineral oil as needed.

App-Based Setup Required

Initial derailleur calibration must be performed via the WHEELTOP app (free on iOS and Android) after installation.

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