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Security chain is better than cables since its not easy to cut it with common Bolt cutters.
'Lighter the Bike the Heavier the locks you Need, to Keep It'..
the German made Abus Bordo folding link locks are much easier to carry (than U locks)
because they fold in 6 links* with secure riveted pivots, and stows in a pouch that fits on your bottle
Mount bosses (or included straps)
* Mod. 6000 - 120 is 8 link for further reacharound.
./.