Positive Reviews Summary: Customers rave about Grey Matter Family Bicycle Shop's friendly and knowledgeable staff, wide selection of new and used bikes and gear, and excellent customer service. Visitors appreciate the welcoming atmosphere and personal touch that makes them feel like part of the family. The shop's commitment to supporting brain cancer research at Barrow Neurological Institute adds to its appeal, making it a go-to destination for all things cycling in PHX. Unique Facts about GMF Bicycle Shop: 1. Founded by a brain cancer survivor with a passion for bikes. 2. Nonprofit shop that donates a percentage of profits to Barrow Neurological Institute. 3. Offers cruiser rental in addition to selling new and used parts and bicycles. Business Specialty: GMF Bicycle Shop stands out for its dedication to funding brain cancer research through the sale of bikes and gear. With a focus on giving back and making a positive impact on the community, customers can feel good about supporting a shop with a cause.