Folding Bikes Blog

Octagon – Tool Free Handlebar Height Adjustment Now Available

Octagon adjustable steerer extenderFor more than 20 years Montague has been dedicated to making cycling more accessible by creating folding bikes that performed as well or better than a non-folding bike and could also be transported easily to give the rider maximum flexibility.

That drive has led to several innovations including our Folding Integrated Technology, the CLIX quick release system used on the wheel and frame of our folding bikes, the Vibration Reduction Curve on our line of pavement bikes, and the Power Angle which gives our folding bikes such a stiff and responsive ride.

One of the most popular innovations, which has been on Montague Bikes for several years, is the Octagon height adjustable steering system.  Octagon lets the rider adjust the height of the bikes handlebars without tools using a quick release. This lets adjustments be made on the fly depending on the height of the person riding the bike or how aggressive a position the rider desires.  For example, biking to work the rider may lower the handlebars for a more aggressive riding position but raise them on the way home for a more relaxed ride. Octagon also makes it easy for different height riders to ride the same bike.

Up until now, Octagon has only been available on a few of Montague’s pavement bikes. We are proud to announce that Octagon is now available as an aftermarket component that can be installed on any bike with the industry standard 1 1/8″ steel steerer tube and is available from your favorite independent bike shop.

For more information on Octagon visit or give us a call at 800-736-5348.

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  1. Pär Lidén
    Posted April 30, 2014 at 2:34 pm | Permalink

    The Octagon seems really nifty. Which stems are possible to use with it? Suppose I want a shorter/ longer stem than the one you supply, can I switch the stock stem for any other of my choice?

  2. Posted April 30, 2014 at 4:15 pm | Permalink

    Hey Pär,
    The aftermarket Octagon can use any stem that normally clamps on a 1 and 1/8″ threadless steerer tube. The clamp diameter on the top of the Octagon is the same as the steerer tube.

  3. Pär Lidén
    Posted May 3, 2014 at 11:30 am | Permalink

    Ok, thanks for your reply, I will go and let install an Octagon on my bike as soon as I have the money for it!

  4. Adam Pellegrini
    Posted September 19, 2014 at 9:52 pm | Permalink

    Will this work on the standard Paratrooper?

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