Alta Safety Washer Hub - Heavy Duty Front Wheel Retaining Clip for Trucks & Trailers | Secure Wheel Attachment for Off-Road & Towing Applications

I noticed that one of my bicycle’s had a regular washer On the front. I also remember one if my guests going on a bike ride, and having the front wheel cone off while riding. Luckily no injuries,But these washers keep the wheel in place.Highly recommend.