Tandems solve a specific problem that no other bike can: riding together when two people have different fitness levels. A strong cyclist and a casual rider can cover the same ground at the same pace. The UK tandem market is small but dedicated — production tandems from Dawes, Orbit, and Cannondale appear used regularly. Custom frames from Mercian and Roberts are highly prized. This guide covers road, touring, and mountain bike tandems, captain/stoker sizing, pricing from £300 to £3,000+, and what to check on timing chains, brakes, and wheels.
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