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NEW.GTRO 3:SPEED INTERNAL GEARBOX CHAIN.SET
£425.00
- Compact, front‑mounted gear unit designed to replace a traditional triple chainring setup with a cleaner, more robust drivetrain. Built in the UK, this gearbox delivers direct‑drive first gear plus two incremental ratios (1:1, 1:1.43, 1:1.79) for smooth transitions under load or from a standing start. By centralising gearing at the crankset and maintaining a straight chainline, the need for a front derailleur is eliminated, chain‑skew and drops are prevented, and maintenance demands are dramatically reduced. Whether you’re riding a city commuter, folding bike, hybrid, or e‑bike, the NEW‑GTRO lets you shift reliably, precisely, and without fuss, all while preserving compatibility with standard rear transmission systems.
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- New, updated version, produced in the UK
- Gloss black as standard
- Perfect for trekking, hybrid, urban, single speed, city, and folding bikes, as well as for off-road non-competition bikes, e-bikes, and trikes
- Can shift to first gear from a standstill, like in a car, or under load
- Immediate gear change, quicker and easier than a front derailleur
- No chain-skewing and chain-dropping, even when paired with a rear derailleur
- Reduced maintenance, no lubrication necessary
- Heavily tested (on-road, off-road, laboratory, and winter tests)
- 1:1 / 1:1.43 / 1:1.79 ratios
- Direct-drive 1st gear, second and third are incremental
- 5-bolt spider for 130bcd chainrings
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- Not suitable for competition MTB, downhill, or dirt applications
- The easiest front gearbox to install
- No frame modifications necessary
- Compatible with most bicycle frames, using English threaded BSA bottom bracket shell
- Shell diameter cannot exceed 45.6 mm
- Trigger or twist-grip shifter
- Compatible with any rear transmission (derailleur, geared hub, single speed hub, rear motor) except fixed wheel. For internal geared hub, please check the manufacturer’s specs for the smallest front chainring allowed
- Also available for Brompton and other folding bikes
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- Get in touch for more details or to discuss specific requirements
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- Follow us on socials for recurring promo codes
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- Sales outside the UK will incur local duties.
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- 1/2 weeks lead times
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- - nFIXED London - #L35515M0R3
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