CLASSIC STEEL LUGGED FRAME

Made from high-quality 4130 chromoly steel using traditional lugged construction and copper brazing. This process avoids stress concentrations that occur with conventional welds, offering excellent stability, durability, and a timeless, classic aesthetic.
VERSATILE GRAVEL PERFORMANCE

The durable steel frame provides a smooth ride by dampening vibrations and offers high corrosion resistance. With 20-inch gravel tires, you can tackle both smooth asphalt and uneven terrain with maximum comfort and grip.
PRECISE DRIVELINE AND POWERFUL BRAKES

Equipped with a reliable 9-speed MicroShift Advent derailleur (supporting up to 36T) that provides flexibility on climbs. Forged and CNC machined hydraulic disc brakes guarantee strong and consistent braking power in all weather conditions.
LIGHTWEIGHT AND COMPACT WHEN FOLDED

Weighing approx. 11.7 kg, the folding bike offers an ideal balance between stiffness and mobility. It folds effortlessly and fits perfectly into a car boot or tight storage spaces – ideal for spontaneous bikepacking adventures.

ROCKBROS | SKU: 70030013604

Gravis-Steel Folding 20" Gravel Bike

Note: This product is available for pre-order. Estimated delivery time is two months.

5.510^{00 zł}

Tax included Shipping calculated at checkout.

Colour: Tytanowy

Shipping and delivery

We still offer free shipping to Germany, Austria, and Poland – delivery time is approx. 2–3 days.

Please note: Some pre-order items are shipped internationally, which may result in longer delivery times and additional shipping costs. The exact delivery time and any shipping costs will be indicated during the ordering process.

For orders over 300PLN to most other European countries, shipping fees are, as usual, waived.

For more information, please click here.

2-year warranty

The warranty covers material and manufacturing defects, ensuring you will be fully satisfied with your purchase.

Category / Part	Technical Details
Frameset
Frame	ROCKBROS 20" 4130 Chromoly Steel Folding Frame
Fork	ROCKBROS 4130 Chromoly Steel Fork
Weight
Weight	11.7 kg
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider, and luggage) of 100 kg.
Drivetrain
Shifter	MicroShift Advent M8190 9-speed
Rear derailleur	MicroShift Advent M6195S 9-speed
Crankset	Aluminum 170 mm, 44T
Cassette	11-34T, 9-speed
Brakes	PRO CNC Hydraulic Disc Brakes
Wheels
Front wheel	ROCKBROS 20-inch aluminum, 40 mm
Rear wheel	ROCKBROS 20-inch aluminum, 40 mm
Tires	CST 20" * 1.95
Components
Saddle	ROCKBROS Saddle
Seatpost	ROCKBROS Aluminum
Handlebar	ROCKBROS Aluminum

Payment & Security

Metody płatności

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Master sleeving technology (LUG)

This is not an assembly line production: we use classic lugged construction with hand-brazed copper. Beneath the noble clear coat, the golden soul of craftsmanship becomes visible – each joint is a handmade, unique piece.

4130 chromoly steel: Excellent damping and stability

Frame with a soul: Our 4130 Cr-Mo steel surpasses aluminum in strength and comfort. It absorbs road vibrations like a sponge, ensuring maximum riding smoothness. It's an extremely durable companion that convinces with its stability and direct power transfer on both asphalt and gravel (Gravel).