Spec / Color
Size：Small (for 31.8mm diameter or smaller), Large (for 31.8mm diameter or bigger)
Common on European utility bikes, a front wheel stabilizer makes loading front racks simpler. It is a spring connecting the fork to the down tube. It adds a subtle self centering action to the front wheel, making loading and unloading of a bike with a basket, or say, Velo Orange Porteur Rack much easier. The spring also offers some resistance to steering, so it counteracts deflections from hitting potholes and road debris.
Small size for 31.8mm or smaller, Large size for 31.8mm or bigger.