That's a smart move. The Detroit is the spiritual reference, but the Omera needs its own visual identity. A seat tube cutout is a strong signature — instantly recognizable and signals "this is a track-bred frame" without copying Dosnoventa's exact look.
| Feature | Detroit | Omera |
|---|---|---|
| Seat tube | Standard round | Cutout wrapping rear wheel ✅ |
| Down tube | Columbus Airplane ovalized | 50mm round (battery inside) |
| Drive | Chain | Gates CDX belt (visible difference) |
| Brakes | None (track) or rim | Hydraulic disc |
| Rear dropout | 120mm track | 135mm horizontal/sliding |
| Motor | None | Bafang G020 (stealth hub) |
The cutout + belt drive + disc brakes together give the Omera a completely different silhouette from the Detroit while keeping the same aggressive 74°/76° pursuit geometry. Someone who knows bikes would clock it immediately as its own thing. ppl-ai-file-upload.s3.amazonaws
One thing to flag for the frame builder — the Omera has 135mm rear spacing (not 120mm track), so the seat tube cutout needs to be wider than a typical track frame cutout. The wheel sits in the same plane but the hub flanges and disc rotor are wider. Make sure the cutout clears:
- Tire (700×25c) + 3mm each side minimum
- Disc rotor on the non-drive side
- Belt on the drive side
This is doable but the frame builder needs to know upfront. Want me to add this to the frame fabrication brief?
You're right — Omera is aluminium, not steel. Noted permanently.
The stiffness argument still holds for alu: the tall oval orientation gives high rigidity in the frame plane (braking and vertical loads), while the narrow 43 mm width keeps the profile slim between your knees. Aluminium is already stiffer than steel for a given tube size, so the lateral compliance from the narrow axis won't make it feel noodly — it's a net positive for comfort without sacrificing structural integrity. bikeforums