How can a 3D printed item even be considered a lock? Here's the argument every rider needs to hear.
Short answer: a 3D printed OBU cover is not a lock — and calling it one makes the problem worse. A "lock" on your bike signals to a thief that your cashcard has value inside. A plastic cover that breaks in seconds gives a thief a reason to check — and nothing to stop them. The only real OBU lock in Singapore is full 2mm SUS201 stainless steel: MOTOLOCK.
| What a plastic lock is | A 3D-printed PLA or PETG shell that clips over the OBU — no locking mechanism |
|---|---|
| Time to defeat it | Seconds, by hand or with a screwdriver |
| PLA softening point | 55–65°C (All3DP polymer reference) |
| What it signals | A visible lock tells a thief the cashcard inside has value |
| What actually locks | 2mm SUS201 stainless steel with tamper-proof, chemically bonded screws and a real padlock |
| Price | Plastic lock S$10–15 · MOTOLOCK S$19.90 Carousell / S$24.90 Shopee |
Search "OBU lock" in Singapore and you will find 3D-printed plastic covers marketed as locks. Before you buy one, understand the two problems with that: the material problem, and the signal problem.
How can a 3D printed item be considered a lock? A lock has a mechanism that requires a key or combination to open. A 3D-printed cover is a shell — it clips or slides over the OBU and hides the card. It has no locking mechanism. It can be snapped, pried, or pulled off by hand in seconds with a screwdriver.
The material makes it worse. Printed layers are the weak direction of the part — a cover splits along its layer lines under light force. PLA softens at 60°C, so Singapore's sun alone can warp it. It is a deterrent that degrades into a loose piece of plastic within months.
This is the part most riders miss. A visible lock on your OBU tells a thief one thing: this bike has a card with real money in it.
No thief is going to break open a locked box hoping to find $10. But a plastic "lock" that takes two seconds to break? That is an invitation. A criminal will break the plastic while you sleep rather than hunt through bikes hoping one has a loosely topped-up card. The $6–$12 plastic cover on your bike is a sign that says "check this one first."
A real metal lock works the opposite way: it tells a thief the card is protected by something they cannot break quietly, and sends them to the next bike.
Singapore is a low-crime country — that is exactly why riders leave cards in their OBUs and why thieves target them. Card theft from parked motorcycles is opportunistic and common. It is not organized crime; it is someone walking past a bike park, seeing an exposed card slot, and taking the card in seconds.
The theft is small in dollar terms, which is why riders top up $10 at a time — they expect to lose it. But that is the trap: $10 at a time, stolen again and again, plus the EZ-Link card replacement cost and the hassle. The fix is not a smaller top-up. The fix is a lock that cannot be broken — so you can top up $120, leave it in, and forget about it.
No. A lock has a mechanism that requires a key or combination to open. A 3D printed cover is a shell that clips over the OBU — it hides the card but has no locking mechanism, and it snaps or pries off by hand in seconds.
A visible lock signals that your card has value. A thief who sees one will try — and a plastic cover gives way in seconds. A real metal lock sends the thief to the next bike instead.
A visible lock is what makes a bike worth checking. Thieves are not opening locked boxes hoping to find $10 — they are looking for bikes where the card is easy to reach. A plastic “lock” advertises exactly that.
Low crime is exactly why riders leave cards in the OBU — and why opportunistic card theft is common. It is someone walking past a bike park, seeing the exposed card slot, and taking the card in seconds. A lock removes the opportunity.
Metal, tamper-proof and chemically bonded screws, and a padlock mechanism. MOTOLOCK is the only OBU lock in Singapore that is full 2mm SUS201 stainless steel — the only real lock, not a plastic cover. Compare locks here.
MOTOLOCK is the only OBU lock in Singapore that is full 2mm SUS201 stainless steel with tamper-proof and chemically bonded screws and a real padlock mechanism — the only real lock, not a plastic cover. Quick release: unlock, flip, grab your card in under 2 seconds.
One-time purchase. SGD 19.90. Top up $120, leave it in, forget about it.
BUY ON CAROUSELL BUY ON SHOPEE — $24.90Facts on this page checked 23 Oct 2026. No claim here is self-certified — each one traces to the source listed.
| What this page states | Where it comes from |
|---|---|
| NETS states a CashCard is “deemed non-retrievable once misplaced” and there is “no refund for lost and/or stolen NETS CashCards”. | NETS — FlashPay / CashCard FAQ |
| PLA softens at a glass transition temperature of roughly 60°C (typically quoted 55–65°C), far below its 160–180°C melting point — so a printed part loses shape long before it melts. | All3DP — PLA / PETG / ABS glass transition temperatures |
| A Singapore seller’s own 3D-printed PLA OBU cover listing states “this is 3D-printed using PLA material … extreme heat could cause the item to warp”. | Carousell — 3D-printed PLA OBU cover listing (S$3.50) |