H&H
H&H 7 Speed Thumb Shifter for Brompton Bicycle
Non-original brake levers and H&H brake levers can also be installed using the H&H shifter adapter mount

Shifter Options
1. Dual Tap
An upgraded design based on the previous Double Tap system. It is lighter, slimmer, and features an improved internal ratchet for greater stability.
Constructed entirely from aluminum alloy.
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Operation:
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Light press (downward): shifts up 1 → 2 → 3 → 4 → 5…
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Firm press (downward): shifts down 7 → 6 → 5 → 4…
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One firm press can downshift two gears at once
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Weight: 65 g
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Supports: 7-speed
2. SQT Tap
SQT stands for Sequential, meaning it operates in the same sequential shifting logic as the original shifter.
It allows faster multi-gear downshifts compared to the stock system and is housed in a durable plastic casing.
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Operation:
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Push lever: shifts up 1 → 2 → 3 → 4 → 5…
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Press lever down: shifts down 7 → 6 → 5 → 4…
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One firm press can downshift up to three gears at once
(The original shifter can only downshift one gear at a time.)
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Weight: 85 g
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Supports: Up to 11-speed
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Compatibility: Suitable for all types of bicycles
Mounting & Compatibility
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Brake lever–mounted design
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Can be installed directly on original Brompton brake levers or H&H brake levers
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Offers clean integration and is lighter than lockring-mounted shifters