The anti-theft bike light that's more secure than most relationships , a sub-6kg Specialized Tarmac SL8 build, lush Leadville bikes, watt-saving chainrings + more of the week's top tech news

A dazzling light that acts as your bike's own security guard? A sub-6kg Specialized Tarmac SL8 build? Aldi telling us to measure our cassettes with digital calipers? It's all in our weekly tech round-up

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