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Title: climbing block
Review: the climbing block is the one accessory I would recommend to anyone buying an indoor trainer. It stabilizes your front wheel for those really intense workouts and the height of one is just enough to add a little something to your workout. My only dislike is that I wish the three grooves were differing heights, but then this is also a stackable item so I should stop being cheap and buy another one if I want more height.
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