Test: The Corratec Allroad A1 is a smooth-running gravel bike with a comfortable seating position and versatile mounting options. The equipment gives no reason for criticism and is also convincing in practice. With its excellent rolling properties, it is also very well suited as a commuter or touring bike.
Corratec Allroad A1: The facts
Frame material: Aluminium
Wheel size(s): 700c
Maximum tire clearance: 40 mm
Axle dimensions (v/h): 12 × 100/142 × 12
Mudguard Eyelets: Ja
Luggage carrier eyelets (v/h): Yes / Yes
bottle holder: down tube up, seat tube
Weight wheels v/h/total (with tires and brake discs): 1.690g / 1.814g / 3.504g
Weight complete bike without pedals (size M): 10,60kg
Price: € 1.799
Successful frame with comfortable geometry
The Allroad has been expanding the Corratec portfolio since 2018 - initially as a rather comfortable, universal racing bike, it has been clear since this model year at the latest: The Corratec Allroad is a gravel bike! It is now available with both aluminum and carbon frames. For our test, we chose the aluminum top model A1, whose frame is coated in a simple, matt cream tone and does not have a "loud" design. Instead, small accents are set, for example, with red anodized screws in the two bottle holders and the chrome-colored head badge. Cables and cables are mainly routed internally, thru-axles hold the two wheels.
Corratec specifies 40mm tire clearance - but if we look at the throughput of the installed 37mm WTB Riddler, we would claim that 42mm tires - of course depending on the manufacturer and rim - should also find space here. This is good for everyday usability, as wider tires with the mountable mudguards also fit into the frame. Additional eyelets for luggage racks - front and rear - are also available.
Corratec goes its own way with the geometry, which is a lot more comfortable on the Allroad A1 than on most of the other gravel bikes in our test. The rather long chainstays and the generous wheelbase, together with the fairly slack steering angle, also suggest that the bike runs very smoothly.
Geometry Corratec Allroad A1
|seat tube (in mm)
|Top tube horizontal (in mm)
|head tube (in mm)
|chainstay (in mm)
|Wheelbase (in mm)
|Steering angle (in °)
|Seat angle (in °)
|Stacks (in mm)
Solid equipment package
At just under 1.800 euros, the Corratec Allroad A1 is one of the more expensive entry-level models - unfortunately the weight of our test bike in size M is relatively high at 10,6 kg. The reason for this is probably to be found in the frame set, because there is not much to complain about in terms of functionality or weight.
The current Shimano gravel group is responsible for changing gears in a 1-speed setup without a front derailleur. The GRX components on the Allroad A1 come primarily from the 600 group, which is around the 105 level and also has an excellent price/performance ratio. Ergonomically, the STIs can't quite keep up with the higher quality 800 series counterparts, but this is hardly of any importance, especially on a beginner's bike. The rear derailleur comes with Shadow-Plus damping, which creates high chain tension and minimizes chain slap, especially off-road.
The 11-42 SLX cassette in the rear has a range of 379% - this is always sufficient for many riders and areas, but if you regularly want to tackle steeper climbs off the beaten track, you should think about a smaller chainring at the front, because the 42-tooth blade installed ex works demands some power in the legs even in the lightest gear.
|Allroad disc aluminum
|WTB Riddler 37mm
|Shimano GRX RX812
|Shimano GRX RX600
|Shimano GRX RX600 42t
|Shimano GRX RX600
|ZZYZX Twin Bolt
|ZZYZX SL Alloy
|ZZYZX SL Alloy
The wheels on the Corratec Gravelbike come from our own company or from the house brand Zzyzx and make a good impression both visually and technically. The weight is also right: 3.500g for the entire system, i.e. including the not very light WTB tires and the two 160mm brake discs, is a good value for beginners. With an inner width of 19mm, the rims are wide enough to hold slightly wider tires securely.
The other add-on parts also bear the Zzyzx lettering: the 27,2 mm aluminum seat post is inconspicuous, as is the saddle, the cockpit with its fairly short 70 mm stem and the classic handlebars without much flare are a good compromise. The optically successful, but very thin handlebar tape is striking.
More tests, products and background information about the Velomotion Gravel Month:
- Storck Grix Platinum Ultegra Di2 gravel bike in test: Race tourer for gravel and off-road
- GT Grade Carbon Pro in the gravel bike test: Comfortable triangle for lots of driving fun?!
- Orbea Terra M30-D in the gravel bike test: Lively bike for training and gravel tours
- NS Bikes Rag+ 2 in the gravel bike test: Convincing aluminum all-rounder
- Rondo Ruut CF 2 in the gravel bike test: Fast gravel bike with a striking look
Let's Gravel: The Corratec Allroad A1
The first time you sit on the Corratec confirms what we had suspected beforehand - you sit very comfortably, very comfortably, but also very upright on the aluminum gravel bike. Ergonomically, this is really a lot of fun and should particularly appeal to touring enthusiasts. On the other hand, if you like to sit stretched out, perhaps with the saddle raised a little, then you have to remove all the spacers under the stem to adjust the seating position accordingly – but that’s not impossible either.
Nevertheless, when driving, it quickly becomes clear that the Allroad shows its strengths, especially at moderate speeds, and exudes great smoothness when you're rolling. It's a bit more comfortable when accelerating and takes a little time to get up to speed - but as I said, once it rolls, it's easy to keep up the speed and rolls along wonderfully calmly.
However, this smooth running comes into play above all when the surface is not too rough - asphalt, gravel, forest highway - runs! However, if there are potholes, roots, coarse stones or the like, the Allroad lacks comfort at the front. The frame, in combination with the seat post, also handles heavy hits quite well, but the bike struggles on bad ground at the front. In our opinion, however, a thicker, better damping handlebar tape would also help here - the factory-fitted one is too sporty for gravel use for our taste.
With these overall characteristics, we can very well imagine the Allroad A1 as a sporty commuter bike: It is made for this terrain, the seating position is not too sporty for everyday use and thanks to the diverse mounting options, you can easily retrofit pannier racks, bags and mudguards.
Other gravel bike highlights in the test:
Test: In model year 1.0, the BH Gravel X Alu 2020 comes in a new entry-level version for just under 1.400 euros and proves to be an excellent all-rounder that knows how to please with successful geometry and well thought-out equipment. BH Gravel X Alu 1.0 2020: The facts Frame material: Aluminum Wheel size(s): 700cc Maximum tire clearance: 45mm Axle size (f/r): 12×100 / 142×12 Mudguard mounts: […]
Test: With the Checkpoint, Trek sent its first gravel bike into the race for the gravel crown last season. The top model Checkpoint SL 7 convinces in the test across the board - if you can get along with the very sporty basic orientation. Trek Checkpoint SL 7: The facts Frame material: Carbon Wheel size(s): 700c Maximum tire clearance: 45mm Axle dimension (f/r): 12×100 […]
Test: The Corratec Allroad A1 is a smooth-running gravel bike with a comfortable seating position and versatile mounting options. The equipment gives no reason for criticism and is also convincing in practice. With its excellent rolling properties, it is also very well suited as a commuter or touring bike. Corratec Allroad A1: The facts Frame material: Aluminum Wheel size(s): 700c Maximum tire clearance: 40mm […]