LTWOO RX 2x12 Groupset Review: What a Budget 12-Speed Groupset Gets You

Introduction

The LTWOO RX 2x12 is a twelve-speed road groupset that arrives as a loose bundle of parts rather than a boxed retail kit. The set covered here was ordered as a complete 2x12 package for around £200, with shifters, front and rear derailleurs, a cassette, a chain and a pair of brake calipers included. A crankset was not part of this particular order.

That price sits in unusual territory for twelve-speed gearing. The RX exists because it leans on proven lever and derailleur layouts rather than inventing a new control scheme, so the shapes and the shifting logic feel immediately familiar in the hand. The listing itself came from a store with a long trading history and a strong positive feedback rating, which matters when a purchase crosses borders.

Everything is cable operated. Gear changes run through mechanical cables, and the brakes use cable-actuated hydraulic calipers rather than a fully hydraulic system. For riders who maintain their own bikes, that combination keeps installation and bleeding-free setup approachable while still giving hydraulic braking at the caliper.

Who This Product Is For

This groupset makes most sense for riders assembling a bike from a frame or modernising an older machine that still has a good crankset. If you already own a twelve-speed compatible chainset, the RX covers the majority of what a drivetrain needs in a single order.

It is less suited to riders who want a single-brand, fully hydraulic system with matching documentation and retail packaging. The RX is a component bundle, and it should be judged as one.

What Comes in the Box

The parts arrive wrapped in layers of bubble wrap and protective bags, with no official retail packaging. Inside were the left and right shifters, a double front derailleur, a long-cage rear derailleur, an 11-34 cassette, a twelve-speed chain, and a pair of brake calipers.

Those calipers are a different brand from the rest of the groupset, which is common in bundles assembled by third-party sellers. They are cable-actuated hydraulic units, meaning a brake cable pulls a hydraulic piston inside the caliper body. They can also be bought separately and are offered with a range of rotor colours and sizes; this set was ordered in black with 160mm rotors front and rear.

Main Strengths: Shifting, Braking and Build Quality

The shifters are the most distinctive part of the set. Gears move with a small paddle positioned beneath the brake lever, while a button on the body clicks the shift the other way, and the outer lever operates the brake. The hoods carry a textured, grippy pattern and feel slightly larger in the hand than other budget levers, which tends to suit riders who prefer a fuller grip.

The rear derailleur uses a long cage with a carbon fibre cage plate and jockey wheels that spin smoothly. Limit and adjustment screws arrive with a small amount of thread-locking compound already applied, a small detail that points to some care at assembly. The front derailleur is a standard double setup finished in a shiny alloy with a carbon-look surface treatment. An “11” moulded into the back of the body suggests it is shared with the brand’s eleven-speed groupsets, though it handles a twelve-speed chain without complaint.

Weight, Cassette and Chain Choices

Measured part by part, the chain comes in at 255g, the front derailleur at 98g, the rear derailleur at 219g, the right shifter at 209g, the left shifter at 212g, the calipers at 323g, and the cassette at 387g including its lock ring.

The cassette is the heaviest single item and the most obvious place to look for an upgrade. It is an 11-34 unit whose machining differs only slightly from other budget cassettes, and it arrives coated in grease. The chain is a twelve-speed item that also ships with packing grease on it, and the number of links is not marked on the packaging.

Things to Consider Before Buying

• No crankset is included, so factor one in unless you already have a compatible twelve-speed chainset.
• The shifters use a carbon-look finish; the lever body material is alloy.
• The cassette is heavy at 387g with the lock ring, and the chain arrives pre-greased, which matters if you wax your chains.
• The bundle ships without official retail packaging, in bubble wrap and protective bags.
• Braking is cable actuated at the lever, with the hydraulic element contained inside the caliper.

Buying Advice

For a self-built bike or an older frame being brought up to twelve speeds, the RX 2x12 covers the expensive parts of the drivetrain in one order. The shifting and braking hardware is the strongest part of the package; the cassette and chain are the components most riders will want to replace or upgrade later, and better options are not far away in price.

If you already own a suitable crankset, this set is close to a complete drivetrain. If you do not, add that cost to the total before committing. It is also worth deciding on rotor size and colour at the point of purchase, since the calipers are offered in several configurations.

Conclusion

The LTWOO RX 2x12 delivers a working twelve-speed, cable-operated groupset for around £200, with well-finished derailleurs and levers that feel considered in the hand. The compromises are concentrated in the cassette weight, the grease on the chain and the missing crankset. For riders who understand those trade-offs, it is a practical route into twelve-speed gearing.