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Zefal Lock 'N' Roll Seat Post Security Quick Release Clamp

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Questions & Answers (1) Q & A
Award winning innovative new protection for your bike! The Lock 'N' Roll security clamp system from Zefal is as astoundingly simple as a strong deterrent and security proposition.

The trick with Lock 'N' Roll is, when your bike is the right way up, wheels on the ground and saddle upwards, this clamp cannot be opened once locked over.

To unlock it, you must invert the bike so it's resting on saddle and bards with the wheels upwards.

If your bike is securely locked upright to a post or rack, Lock 'N' Roll cannot be opened and your wheels and seat cannot be stolen, yet you retain the practicality and ease of use of quick release skewers in the event of a puncture, mechanical problem or need to store or transport your bike with the wheels and seat off.
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Questions & Answers (1)
What Diameter Is The Bolt For This Clamp?
26 Aug 2015
SJS Customer Service:

The bolt for this clamp is 6mm in diameter.