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- 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 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 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
- follow us on socials for recurring promo-codes
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- * sales outside the UK will incur local VAT and import duties
- * 1/2 weeks lead times
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