Great Frame
ERA 3.5" Mini O4 Frame Kit
ERA 3.5" Mini O4 Frame Kit
Regular price
$90.00 USD
Regular price
Sale price
$90.00 USD
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⚠️ Before you order - read this +
Frame kit only: Electronics, ELRS antenna holder, and action cam mounts are not included.
O4 Pro version: This version fits the stock DJI O4 Pro plastic housing only.
⚠️ CNC Kit owners: If you've converted your O4 Pro to standard form factor with our 7075 CNC Conversion Kit, you need the standard ERA 3.5" Frame Kit, not this one.
Motor mounting: 12x12mm (M2). Not compatible with 9x9mm motors.
Action cam: The frame supports action cams but adds significant weight at 3.5". For action cam use, we recommend our extended 4" arm set.
🇺🇸 US: Ships DDP. All duties and taxes included in shipping.
🌍 Non-EU: Price excludes VAT/tax. Import duties may apply.
The World Opens Up
A basketball hoop. On a 5-inch, you fly around it. At 3.5 inches, you fly through it. FPV feels different when you're this small and this durable. Every gap becomes a line. Every line becomes possible.
This is the O4 Pro Version. Same ERA Mini. Same durability. Built specifically for the DJI O4 Pro camera with stock plastic housing. The larger O4 Pro camera required a redesigned cage and extended bottom plate front. Everything else stays the same.
Full ERA, Compressed
This isn't a stripped-down mini version. It's the complete ERA design philosophy: proven camera protection, compressed X geometry, split deck construction. Scaled to 3.5 inches with zero compromises. Everything that made ERA work, tightened up.
The Cage: Why Injection-Molded Nylon?
The visual signature of the ERA is also its functional core. We don't use aluminum (too rigid) or 3D printing (too weak) for our camera protection. We invested in high-pressure injection molding because our testing proved it superior to every other method. 3D printing creates layers, microscopic weak points where cracks eventually start. Injection molding creates a solid, uniform polymer structure with equal strength in all directions.
Why nylon? It's the same polymer family used in downhill mountain bike pedals and high-end snowboard bindings. Parts that survive thousands of vibration cycles and high-velocity impacts without snapping. TPU is more elastic, carbon is stiffer and can chip on sharp impacts. Nylon sits in between: structural memory to take a hit and keep your camera exactly where you set it. It absorbs impact energy, flexes, and bounces back. It sacrifices itself so your electronics don't have to.
Beyond protection, this solid cage acts as a structural bridge. Combined with our split deck construction, the entire chassis becomes one unified, stiff block that withstands abuse.
The worst cage we've ever seen. One year of bashing by team pilot @scarce_fpv. Still functional.
Action Camera Mounting System
We fly 20°. That's why it's the stock angle. Five mounts available from 10° to 30° in 5° steps. One M3 screw out, swap the mount, done. The cage stays untouched.
Your FPV camera is separate and fully adjustable from 0° to roughly 40°.
The cage supports action cams, but at 3.5" the extra weight changes the flight characteristics significantly. If you want to fly with an action cam, we recommend our extended 4" arm set for better balance and more thrust.
Built Like a Shrunken 5-Inch
Around 300g AUW fully built. Light enough for precision, heavy enough for momentum. The compressed X geometry that made ERA responsive feels even tighter at this scale. Same authority, smaller package.
Bonus: With arms this short, zero props in frame on O4 Pro. Clean footage, every flight.
Hardware You'd Spec Yourself
We build what we fly. That means T700/T800 carbon mix. 12.9 hardened YFS screws that won't strip. 7075 aluminum standoffs that won't bend. 22mm deck height (up from ERA's 20mm) for easier installation without sacrificing rigidity.
Small detail that matters: TPU strap holder locks your battery straps in place between packs. No more loose straps slipping during swaps.
Construction
Arms lock into the frame with a form fit. No slop, no play. The bottom plate is under tension from the center screw, adding stiffness without weight.
Need to access your stack? Leave the camera attached. Four screws out, top plate off, full access. Nothing to realign when you're done.
Every cage is checked by hand. Heat inserts installed with specialized equipment. No batch leaves without personal QA.
Choose Your Version
- ERA 3.5" Mini Frame Kit - Analog and DJI V1/O3/O4 Pro CNC Kit
- ERA 3.5" Mini Frame Kit O4 - DJI O4 Pro with standard camera housing
The 3.5-Inch Standard
We didn't just build a frame. We worked with T-Motor and Gemfan to make 3.5-inch freestyle work the way 5-inch works.
Proven bell design with a brand new 3mm shaft. The scaled-down equivalent of a proper 5-inch motor. Lighter than 1604 designs with oversized shafts, more durable than T-mount alternatives. No C-clip. One small M2 screw to swap the bell. Prop swaps feel like 5-inch again.
Purpose-built for this motor standard. Native 3mm bore, M3 nut, no adapter. Screw on, hex out, fly.
We hope other manufacturers adopt these specs so 3.5-inch freestyle becomes the standard it should have been from the start.
What's Different on the O4 Version
- O4 Nylon Camera Cage: Redesigned for the larger DJI O4 Pro camera. Same injection molding process, same durability.
- Extended Bottom Plate Front O4: Longer carbon plate to match the O4 cage dimensions.
- Updated 3D Prints: O4 VTX Dual Antenna Holder, new TPU camera inserts.
What You're Getting
A frame that won't break in normal freestyle. Camera protection that actually protects. Hardware that won't strip, bend, or fail. A build experience that doesn't fight you. A quad that flies like it should.
Developed by pilots who crash, rebuild, and fly the next day. Every detail comes from real sessions, real crashes, real frustration with how things used to work.
What's in the box +
Every part available as a spare in our store.
Injection-molded
Carbon fiber
3D printed
All 3D printed parts available as free STL downloads on the product pages.
Hardware
Full screw list +
11x 8mm M3 Buttonhead 12.9
16x 7mm M2 Buttonhead 12.9
4x 20mm M3 Countersunk 12.9
4x 14mm M2 Countersunk 12.9
1x 22mm M3 Countersunk 12.9
5x M3 Pressnut
4x M3 Lock nut V2A
4x 18mm M2 Caphead 12.9
4x 7mm M2 Caphead 12.9
4x 6mm M2 Caphead 12.9
4x 4mm M2 Caphead 12.9
4x Lock nut M2 Aluminium
4x 9mm M1.6 Caphead 12.9
3x 6mm M2 Countersunk
Miscellaneous
Specs
What's inside.
Standoffs
7075 Aluminum
Frame geometry
Compressed X | 168mm wheelbase
Hardware
12.9 hardened steel
Prop clearance
Fits up to 3.6" props
Stack mounting
M2 25.5x25.5mm | M3/M2 20x20mm
Motor mounting
M2 12x12mm
Camera mounting
Up to 20x20mm
VTX mounting
20x20mm | 25.5x25.5mm
Frame
What makes ERA durable.
Carbon
T700/T800 | Up to 55% stronger than typical FPV frames
Camera cage
Injection-molded nylon | Impact absorbing
Battery straps
Nylon-kevlar | Won't snap on impact
LiPo pad
Super sticky | Keeps battery in place
Action camera angle
Fixed 20° (adjustable via mounts 10-30°) | One M3 screw
Bell protection
Three point motor bell protection
Skids
FDM printed | Protects arms on landing
Arm swap
One screw arm swap
Action cam swap
One screw action camera swap
Vastly more compact
ERA Mini opens up a new library of flight spots that are physically inaccessible or too dangerous for a full-sized rig. At this scale, the physics of flight change in your favor. By dropping the hazardous weight and volume, you remove the 'threat factor.' This allows for stress-free proximity flying in sensitive areas where a full-sized rig would be a liability.
Yet, unlike lighter micros, ERA Mini retains enough mass to carry momentum through the air. It avoids the floaty feeling of smaller copters, offering the locked-in trajectory of a big rig, just condensed. Every gap becomes wider, and every line becomes possible.
Action Camera Mounts
Available separately for the nylon camera cage.
Available in 10-30° angles.
- GoPro 9,10,11,12,13
- GoPro 11 Mini
- DJI Action 2
- DJI Action 5 Pro
- DJI Osmo Nano
If you have a 3D printer, you can download the mounts from the 3D Printed Hardware page for free.
Accessories
Need some extra chooch?
3D printed acessories available separately for the ERA frame, downloadable for free.
Customer Reviews
Overall rating: 5.0 / 5 from 55 reviews.
Die Qualität des Frames ist richtig, gut. Deshalb hab ich mich auch für den Mini und den Großen entschieden 👍🏼
Tolles Frame! Fliegt auch schon mit Standard PIDs und den neuen 1604.5 Motoren mit den Gemfan Props super!
Flies great
Lets Go Build this nice Drone ! Yeahhh THX 👌❤️
Awesome frame, it was so much fun to build. Built to take a beating for sure.
Einfach der beste Frame...
Taking it out for it's maiden flight. Can't wait. Built like a little tank. The 04 pro camera looks really secure and safe
Hi. Heute habe ich die gebaut mit den neuen It‘s 1604.5 Motoren und den passenden neuen Gemfan. Wenn die so fliegt wie die 5“ dann wird das geil. Ich freue mich auf den ersten Flug. Top Qualität wie immer. Gruß Henry
Awesome frame. This thing is a rocket and it flys really smooth. Built with size 2006 2550kv motors powered by a 1350mah 6S.
Love it!
Love it
Best Frame ever 👌👌
Great. Just pertect!
Good frame. But little hard to fit in the the flywoo stack and o4 vtx on the frame
Einfach Klasse Frame und das Team dahinter ist auch Klasse!!
Erster Testflug gemacht! Fliegt super . 👍
It was a pleasure to build and even more of a pleasure to fly.
Super geiles Teil und einfach top Qualität!
👍👍👍👍👍
My first 3" 😍
Great frame, havent' had a chance to fly it yet though. Poor weather.. Very much looking forward to trying it out..
Still building and waiting for parts from other suppliers. So far, really impressive and one of my favourites to build!
Perfect quads, German engineering never disappoints
Mega Frame gibt nichts besseres in der Größe
Best quad!
I'm in love with how the Era Mini looks! It's like the little brother of the Era 5". Can't wait to fly this beast!
The best FPV frames with unlimited possibilities. I’m a fan for life!
Ein Traum. Der maiden kann kommen.
the mini version is really cute - and flies great! almost no prop wash. building this was also easy - a very good frame!
Great quality!
Einfach nur Super!
Absolut griles Teil
Top
Perfect, easy build just like the 5" love it!!!
Ready for Maiden 😎
leider habe ich den frame noch nicht genutzt weil ich durch einen schweren unfall nicht so fit bin und möchte im Herbst alles zusammenbauen. ich freue mich schon sehr und der super nette kontakt und service hat die Vorfreude auf jeden fall noch erhöht.
Top frame einfach Klasse das Teil.
Good Frame. As for the available colors: Purple is missing! ;)
Awsome frames. Will do business again.