Chain snapped – ride over? Here’s how to get back in the saddle in 5 minutes

​We’ve all been there: the perfect day out on a bike, the winding hairpin bends of a mountain pass ahead of you, five kilometres from the nearest car park. And then this happens. A dry snap, a brief moment of weightlessness on the cranks – and the rude awakening. A broken chain. Welcome to the club of involuntary push-bike rides.

That said, the situation doesn’t necessarily have to end in disaster. If you’re prepared, you can have the bike back on the road in ten minutes.

Reasons for a broken chain

Before we get to the repair process, a quick word on the cause: a standard 11- or 12-speed chain is a precision component made from alarmingly little material. The links are paper-thin, the rivets delicate. Combine that with a worn cassette, a warped rear derailleur or a vigorous burst of power whilst overtaking on an uphill section, and a break is only a matter of time.

The most common culprits:

• Excessive wear (chain elongation of more than 0.75 per cent)
• Switching faults under load
• Damaged or poorly fitted chain rivets
• A faulty quick-link that has come undone without anyone noticing

​You’ll need this tool

This is where the wheat is separated from the chaff – or the rider with a mini-tool from the one without. You can find a selection of useful mini-tools here.

The absolute essentials for a hiking rucksack:

A chain tool (or a multi-tool with a built-in chain tool) and a quick-link to suit your chain size. This isn’t a luxury – it’s essential. Anyone who argues that this is too heavy or unnecessary may well end up having to push their bike.

Step by step: repairing a broken chain

1. Stay calm and assess the damage Where exactly has the chain broken? Has a single link snapped, a rivet come loose, or is the quick-link faulty? Wipe the chain clean – using the sleeve of your jersey or, better still, a cloth.

2. Remove damaged links Use the chain tool to remove the damaged link (or links). Never reuse an old rivet! Once the rivet has been pushed out, it is no longer fit for purpose.

3. Set up a quick link Join the two ends of the chain, attach the quick-link, give the pedals a quick turn – and let it click into place. Sounds simple, provided you’ve got the right link with you. 12-speed quick-links won’t fit on an 11-speed chain.

4. Check the chain length A shorter chain means: take care when shifting to the larger sprockets. If in doubt, stick to the small chainring and the middle cassette positions. It’s better to cycle home with a limited range of gears than with a broken chain in the rear derailleur.

​In an emergency: single-speed repairs

Forgotten your quick-link? Left your chain tool at home? Then it’s time to get creative. By removing enough links, you can shorten the chain so that it runs in a fixed gear – without a rear derailleur. Secure the derailleur with a cable tie or simply unhook it, then tension the chain on a medium-sized sprocket.

Regular maintenance is the best form of protection

A chain break is rarely an accident. It’s usually the result of something else. For too little maintenance, changing the chain too infrequently, or shifting gears too aggressively under full load. The chain is the most neglected wear part on a bike – yet it’s the only one that transfers the power from your legs to the road.

Rule of thumb: Check the chain every 1,000 to 1,500 kilometres. Replace it if it has stretched by 0.5 per cent. If you wait until it has stretched by 0.75 per cent, you’ll soon be out of pocket for a new cassette.

And: Always set off with a quick-link and a multi-tool. These are essential items – not optional. Just like a helmet.

​Checklist for the saddlebag

• Quick-link (to match the chain size!), e.g. Shimano Quick-Link 12-speed
• Multitool with chain tool, e.g. Topeak Mini PT30
• Gloves or cleaning cloths
• Cable ties (universal tool)

Do you have a better trick for this quick fix? Bring them on. The best travel tips come from the community