Montague Octagon

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Montague Octagon quick release height adjustable steerer extenders. Montague Octagon quick release height adjustable steerer extenders. Fast, easy handlebar height adjustment witho ut tools Clamps to top of steerer, original stem clamps to top of Octagon device Due to variations in aluminum steerer tube wall thickness, the manufacturer specifies usage only with 1-1/8" threadless steel steerer tubes Octagonal shape keeps steering engaged while raising and lowering the stem Show more