Belt drive vs chain — which one for Iceland?
If you're buying an e-bike to ride through an Icelandic winter, the drivetrain question matters more than it does in milder climates. Here's the honest comparison — including where the chain wins.
What's the actual difference?
Both drivetrains do the same job — transfer power from the pedals (or motor) to the rear wheel — but in different ways.
- Chain — metal links running over toothed sprockets. The standard in cycling since 1885. Pairs with derailleurs, repairable with simple tools.
- Belt — a single carbon-reinforced rubber loop running over toothed cogs. The same technology as on motorcycles, increasingly common on better e-bikes. Pairs with an internal gear hub.
Why it matters extra in Iceland
Three things make Iceland harder on chains than most countries:
- Salt — Reykjavík's streets are salted from October through April. Chain lubricant breaks down and the chain rusts. A salt-soaked chain usually needs replacing within 18 months.
- Temperature swings — frequent freeze-thaw cycles. Water gets into the links and freezes there, accelerating wear.
- Long storage — many bikes sit unused over winter. A belt doesn't care; chains corrode standing still wherever damp air reaches them.
Belt drive avoids all of it.
Typical 5-year cost (CGO600 Pro vs comparable chain version)*
| Item | Chain | Belt |
|---|---|---|
| Drivetrain parts over 5 years | 2× chain (~12,000 kr.), 1× cassette (~14,000 kr.) | 1× belt (~14,900 kr.) — usually lasts over 30,000 km |
| Lubricant + degreaser | ~2,500 kr./yr | 0 kr. |
| Workshop labour (annual service) | ~20,000 kr./yr | ~5,000 kr./yr |
| 5-year drivetrain total | ~138,500 kr. | ~39,900 kr. |
Time saved too: roughly 4–6 hrs/yr of chain maintenance vs 30–60 min/yr for a belt.
* Typical estimated cost, not a quote. Based on year-round riding (~3,000 km/yr) in salted urban areas, current t2 parts prices and standard workshop rates. Actual cost depends on use, conditions and care.
Where the chain wins
An honest list:
- Roadside repair. Belts rarely fail, but when they do you can't fix it with chain tools. A chain you can often patch to get home.
- Gear range. Internal gear hubs (paired with a belt) usually offer 250–400% range; the best derailleur systems reach 450%+. Mountain riding, steep climbs or heavy cargo bikes may want the wider range.
- Price difference. Belt-drive bikes usually cost 20,000–40,000 kr. more than the same bike with a chain.
- Time to replace. A worn chain is a 20-minute home job. A worn belt is a workshop job and takes longer.
What we carry at t2.is
We carry seven belt-drive bikes across three categories:
City — CGO600 Pro · CGO800S (open frame)
Trekking — AGO T · AGO AIR Belt Drive · AGO Performance
Cargo — LONGTAIL DUO · CARGO ONE
Our honest advice
- If you ride year-round in Reykjavík or another salt-treated town: choose belt. The salt-on-chain burden is real.
- If you ride mainly off-road or in summer and enjoy tinkering yourself: a chain is fine. You save up front and the 5-year difference is smaller.
- Cargo and family bikes: belt every time. Low maintenance isn't optional when the kids are on the bike twice a day.