KTM Macina Aera FS: suspension setup & specs
The KTM Macina Aera FS is an e-MTB for trail and touring with 100 mm of fork travel and 100 mm at the rear. It is powered by Bosch PERFORMANCE CX BDU3840. Here you will find all 2 current builds with fork, shock and shock size, plus matching SAG and tyre pressure starting values.
Calculate the setup for your KTM Macina Aera FS →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: 27.5.
| Build | Fork | Shock | Shock size | Rear travel | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|---|
| Elite Lfc | Suntour XCR34 Air (100 mm) | Suntour EDGE-X R | 190x45 | 100 mm | Bosch PERFORMANCE CX BDU3840 800 Wh | 29.5 kg | – | Setup → |
| Prime Lfc Di2 | FOX 34E FLOAT (100 mm) | Suntour EDGE-EVO 2CR-Lockout | 190x45 | 100 mm | Bosch PERFORMANCE CX BDU3840 800 Wh | 28.9 kg | – | Setup → |
How it compares
With 100 mm of fork travel, the KTM Macina Aera FS is on the shorter side; the median of the 101 comparable bikes in the “e-MTB for trail and touring” category is 150 mm. Travel is the same front and rear at 100 mm each. Within KTM’s e-mountain bikes, it sits between the KTM Macina Aera and the KTM Macina Team on travel. KTM builds the frame from carbon.
At a minimum of 28.9 kg (Prime Lfc Di2 build), the KTM Macina Aera FS is heavier than its category median of 23.4 kg – 5.5 kg more. There are 0.6 kg between the lightest and the heaviest build. For suspension, KTM combines components from FOX and SR Suntour. In total, 2 different forks are used, from the Suntour XCR34 Air to the FOX 34E FLOAT. Drive comes from Bosch PERFORMANCE CX BDU3840, paired with 800 Wh of battery capacity. Worth knowing for heavier riders: the maximum system weight is 139 kg – after about 30 kg of bike, that leaves around 109 kg including kit.
Setup notes for this spec
- Fork (FOX 34E FLOAT): air goes in through the valve on top of the left leg. After every change, compress the fork firmly a few times before measuring SAG.
- Rebound: on FOX suspension the rebound adjuster is red. Always count clicks from fully closed (clockwise to the stop) so you can return to any setting.
- Shock (Suntour EDGE-X R): get on the bike in your normal riding position, step off carefully and read the O-ring. Always cycle the shock a few times after pumping.
- e-MTB: because of the extra weight, start with slightly more tyre pressure – the surcharge is already built into the table below.
Target SAG for the KTM Macina Aera FS
The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If KTM specifies its own target SAG for your model, that takes priority.
100 mm fork, 45.0 mm shock stroke (all builds)
| Riding style | Fork SAG | Shock SAG |
|---|---|---|
| XC / touring | 17 % = 17 mm | 24 % = 10.8 mm on the shock shaft |
| Trail | 20 % = 20 mm | 28 % = 12.6 mm on the shock shaft |
| Enduro / rough | 22 % = 22 mm | 30 % = 13.5 mm on the shock shaft |
| Bike park | 20 % = 20 mm | 27 % = 12.2 mm on the shock shaft |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
The values apply to 2.36″ wide tubeless tyres with a trail casing, including the e-MTB surcharge. With an inner tube add about 0.2 bar (2.9 psi), with an insert take off about 0.1 bar (1.5 psi). Stock tyres: Schwalbe Johnny Watts Perf. Folding 60-584 DD Reflex / Schwalbe Johnny Watts Perf. Folding 60-584 DD Reflex.
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.48 bar (21 psi) | 1.68 bar (24 psi) |
| 70 kg | 1.60 bar (23 psi) | 1.80 bar (26 psi) |
| 80 kg | 1.72 bar (25 psi) | 1.92 bar (28 psi) |
| 90 kg | 1.84 bar (27 psi) | 2.04 bar (30 psi) |
| 100 kg | 1.96 bar (28 psi) | 2.16 bar (31 psi) |
| 110 kg | 2.08 bar (30 psi) | 2.28 bar (33 psi) |
| 120 kg | 2.20 bar (32 psi) | 2.40 bar (35 psi) |
Air pressure in the fork and shock
You will find a guide value for air pressure on the fork sticker (or on the shock) or in the suspension makers’ charts. Our calculator also takes riding style and rebound into account. In the end, measured SAG is what counts.