Trek Knock Block (with Cam McCaul!)

Trek Bicycle via YouTube

Shop Trek Mountain Bikes: http://bit.ly/2R4wRnJ

Knock Block’s headset-integrated frame defense solution stops spinning fork crowns and handlebars from damaging your frame.

But how?

Cam McCaul gives us the lowdown.

Find your local Trek retailer: http://bit.ly/2Ncoi9t

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