Specifications
Full technical breakdown of the OX 2.0 wireless electronic shifter/derailleur and the matched 4-piston hydraulic disc brake set.
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.
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.
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.
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.
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
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.
Thank you for visiting our listing. If you have any questions before purchasing, please send us a message through eBay and we'll respond within 24 hours.







