In this article, we use so-called affiliate links. With every purchase through these links, we receive a commission from the merchant. All relevant referral links are marked with . Learn more.
With the Colmaro, the Dutch rely on a frameset that is suitable for different bikes, even with different wheel sizes of 26 and 28 inches. On the gravel version of the bike, we find the only 26-inch wheels together with the widest tyres in the field. In combination with the saddle, which is positioned further back, and the slanted and two-part seat post, you sit extremely comfortably and almost luxuriously, although the frame's measurements are only average. Due to the centre of gravity on the rear wheel, the front wheel rolls more easily; this leads to slightly less control in difficult corners, but relieves the strain on the arms and torso.
Koga Colmaro Extreme: Comfortable for long distances
The posture on the Koga Colmaro Extreme is very comfortable for long distances. This is partly due to the multi-curved handlebars, which allow you to keep your hands almost 22 cm apart. This allows you to ride in a relaxed manner or move into an aerodynamic position in strong headwinds. The 2x crankset allows you to pedal at speeds of up to almost 50 km/h and there is an additional gear reduction for uphill riding.
The lack of a twelfth sprocket is hardly noticeable here. The main weight of the bike lies in its hydroformed aluminium frame with ground and corrosion-protected seams. This gives the bike high rigidity in all directions, so that the maximum system weight of 120 kilograms can be utilised without any problems. Depending on the distribution of the load, however, the straight-line stability may be slightly impaired. Overall, it is an excellent bike-packing bike.
The concept with smaller rims and thicker tyres is bold, but it works. The overall comfort is great and the components for relaxed, long rides on any surface are well chosen. However, the Colmaro lacks the sharpness and balance to be a top all-rounder.
More gravel bikes from the test
Koga Colmaro Extreme in detail
- Price: 2499 Euro >> available here
- Weight of complete wheel: 10.82 kilos
- Frame sizes: S / M / L / XL (test size greased)
- Note: 2,7
Features of the Koga Colmaro Extreme
- Brakes: Shimano GRX 810 (160/160 mm) | Grade: 1.0
- Drive/gear shift: Shimano GRX 810 (2 x 11; 46/30, 11-34 t.) | Grade: 2.5
- Tyres: WTB Venture RoadPlus TCS 47b-650c (eff.: 48 mm) | Grade: 2.0
- Impellers: DT Swiss G 1800 Spline 650B
- Impeller weights: 1750 / 2253 grams (front/rear)
Geometry of the gravel bike
- Seat/top/head tube: 555 / 575 / 182.7 millimetres
- Wheelbase/caster: 1040 / 69.5 millimetres
- Stack/Reach/STR: 619 / 377 millimetres / 1.642
- Stack+/Reach+/STR+: 657 / 537 millimetres / 1.223
Advantages and disadvantages
- Plus: good seating comfort, variable handlebars, top wheels, long warranty
- Minus: only 4 sizes, heavy frameset, few sporty positions
