The Cube AMS Zero99 C:68 SLX 29 is a true classic amongst race bikes. Whilst other brands, such as Canyon, Orbea, Scott and Specialized, have in some cases only just unveiled new cross-country machines in the last few days, Cube has so far held off on an update. With its relatively short suspension travel and classic race geometry, the AMS Zero99 strikes a conservative note, but enters the race with top-of-the-range spec and a light weight. Particularly amongst die-hard racers, these are the traditional values that have always been held in high regard. Will the Cube AMS Zero99 C:68 SLX 29 still be able to keep up in the 2026 season?
The Cube AMS Zero99 C:68 SLX 29 in detail
- Intended use: Cross-country / Marathon
- Suspension travel: 110/110 mm
- Wheel size: 29”
- Frame material: carbon
- Frame weight: from 1600 g (manufacturer’s specification)
- Weight of complete bike: 10.0 kg (BIKE measurement, size M, excluding pedals)
- Price: 6,199 euros
- Special features: Steering angle adjustment via headset cups
Facilities
- Front fork / Rear shock: Fox 34 / Float SL Factory
- Drivetrain: SRAM X0 / GX Eagle AXS transmission (1x12), 32; 10–52
- Brakes: Magura MT8 SL, 180/160 mm
- Seatpost: Fox Transfer SL Factory SL, 150 mm
- Wheels: Newmen Phase 30 light/light
- Tyres: Schwalbe Racing Ray / Ralph, Super Race, Addix Speed, 29 x 2.35
Quick and easy
Light and quick acceleration is considered a key strength in race bikes. The Cube AMS Zero99 C:68 SLX 29 secures a significant advantage here thanks to its fast Schwalbe tyres and a lightweight carbon wheelset from Newmen. The narrow tyres, made from a hard Super Race compound, promise brisk acceleration. Based on BIKE tests, we can confirm that the Newmen wheelsets have low inertia. This means the Cube should shoot forward from the starting line like a bolt of lightning.
The rest of the spec is also very impressive. Prospective buyers should just not let themselves be too dazzled by the drivetrain. The SRAM X0 Eagle AXS rear derailleur changes gears reliably even under load via wireless command, but the wear parts for the cassette and chain are from the significantly cheaper GX range. Although Cube has opted against a flex pivot and in favour of an additional rear bottom bracket – contrary to the current standard in this class – the weight of the complete bike (relative to its price) is still at a good level.
When it comes to the riding position, the Cube AMS Zero99 C:68 SLX 29 is fairly traditional. It’s clear at this point, if not before, that the last geometry update dates back to summer 2021. Compared to the latest race bikes on the market, the seat angle is flat and the top tube length is compact. A long, flat cockpit ensures an extended riding position, which can be ideal for long, undulating routes. On very steep climbs, the long chainstays help with the ascent. A three-position handlebar remote for the suspension lockout can be used during sprints. However, based on our test experience, its position on the right-hand side, well above the grip, is unfortunately not necessarily ergonomic.
A killjoy on the downhill
It’s no secret that cross-country bikes have evolved in recent years, primarily to improve downhill performance. The Cube AMS Zero 99 also aims to keep pace in this regard, with a 66.1 flat head angle. Using the headset cups, this angle can be increased by 0.6 degrees for even more direct steering. Unfortunately, that’s where the Cube race bike’s modernity ends. The reach is very short and the seat tube is high. On challenging terrain, this combination results in stilted handling, particularly at high speeds. Unfortunately, this bears no resemblance to the trail-riding confidence of the latest generation of cross-country full-suspension bikes. The 110-millimetre suspension travel and the rather narrow tyres also reach their limits sooner than those of the competition. Although changing direction is easy thanks to the lightweight wheels, the long rear end and the long stem put a damper on the fun. The Cube AMS 29 is more about winning races uphill than nimbly and safely whizzing along the trail.
Conclusion
When it comes to the right course profile, the Cube AMS Zero 99 is an oldie but a goldie. Lightweight wheels and a classic, race-oriented riding position make this bike ideal for sprints. Cube offers excellent value for money. However, on the demanding terrain of a modern cross-country race course, the five-year-old geometry no longer holds up, and the AMS Zero 99 falls behind the competition. - Jan Timmermann, BIKE editor
Pro
- lightweight, fast bikes with excellent acceleration
- good value for money
Cons
- Conservative geometry slows you down on steep, challenging terrain
- fewer reserves than its modern racing bike rivals
- Cockpit ergonomics that could be improved
Jan Timmermann
Editor
