Bike configurator

Kolos No.4 GR

Gravel Bike

Open in configurator
Kolos No.4 - touring and expedition bike

Fast bike for poor roads

Gravel Bike with butted chrom-molybden frame is the right choice for everyone who wants an elegant, all-purpose, durable and fast bike which can be used with bikepacking equipment for longer journeys as well as with fully loaded racks for expeditions.

Custom bikes - tailored to your requirements in the online Kolos configurator.

Frame height, colour, various fittings and a wide range of accessories by renowned producers such as Schwalbe, Ortlieb, Brooks – which you can configurate.

Reliability and durability. 3-year warranty. Free warranty service.

We will build you a bike you can always rely on. We provide an extended warranty and take full care of your bike during the warranty and post-warranty service. We take care, you ride!

Recommended configuration:
from € 1,584 VAT included



The frame is made from CrMo chrom-molybden steel with butted tubes. Frame tubes size: Top tube - 0,9/0,6/0,9 mm, down and seat tube 1,2/0,9/1,2 mm. Headtube 1 1,8“, seatpost diameter 27,2 mm. CrMo fork. Cables fully covered with bowden, recessed nuts for a bottle wire basket, rear and front Low Rider rack, mudguard fittings.

Frame drawing with dimensions here:
frame 54 cm frame 58 cm frame 62 cm


Front and rear hub PROFIL disc, 36 hole, 6 bolt disc brake rotor
Cranks: Shimano Deore LX FC-T671, 170MM HOLLOWTECH 2, 44X32X24T.
Derailleur: Shimano Deore LX RD-T671
Front derailleur: Shimano Deore LX FD-T671
Cassette: Shimano CS-HG62-10, 10-SPEED 11-12-14-16-18-20-22-25-28-32T
Chain: Shimano CN-HG95
Shifter set: Shimano Dura Ace 7900, 3x10 speed bar end


Dual aluminium rims 28“ riveted, designed for disc brake, stainless steel spokes, black 2 mm, Schwalbe Smart Sam 42x622 tyres with puncture protection.


Mechanical disc brakes AVID BB7 Road
Rotors AVID 160 mm, 6 screws


Pedals – Wellgo M111
Seatpost – Humpert Ergotech, aluminium
Stem – adjustable Humpert Ergotech Octopus, A-head post, 3 pads - height 6 cm
Handlebar – Road 440mm, bar end shift levers, black leather look tape
Saddle – leather black Kolos
Headset – Humpert Ergotech Cartridge

Extended 3-year warranty!

Kolos No.4 bikes will not disappoint you in any form. Whether a cross bike, or a more equipped trekking bike or a fully assembled expedition bike. All our models will be a reliable support on your journeys. Kolos No. 4 bikes are sold with an extended 3-year warranty.

Colossally up hill and down dale!

Kolos No.4 Gravel Bike corresponds to the current trend of robust “road bikes” for extremes, but moreover, offers a wide range of an individual specification.

The core is the light yet robust chrome-molybdenum (CrMo) frame which comes in three sizes, just for your figure. It is sturdy and flexible – especially designed for strenuous cycling.

We offer Kolos No.4 Gravel Bike in a recommended configuration, as it appeals to us. However, this doesn’t mean that its design is definitive. For example, this bike goes perfectly with the set of backpacking Ortlieb bags: Frame-Pack, Seat-Pack and Handlebar-Pack which can be selected in the Configurator.

If you take a close look at the Configurator, you'll see that the bike can be modified in a fundamental way using options from the wide range of fittings towards a simpler fitness bike, a more demanding adventure bike or a fully equipped bike for long-distance expeditions.

It's only up to you what adventure you want to experience with your Kolos bike and what's your financial budget.

If you don't find exactly what you need in our Configurator, please contact us and we'll prepare an individual quotation after we verify the compatibility, availability and price of the parts preferred.

The result will always be a completely individual product – the bike that's been designed for you and your adventures only.