Grey Matter Family Bicycle Shop


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From the business


Full Service Bicycle Shop
Lifetime Tubes: free flats for life
New/Used Bicycles and Parts
Bicycle Accessories
Wheel Building
Fork Servicing


Established in 2014.

This Bicycle Shop was started by Kyle Claffey, who was fighting brain cancer. It was his dream the have his own bicycle shop. He lost his fight after 5 years in May of 2014, just a month before opening GMF Bicycle Shop. GMF (Grey Matter Family) Bicycle Shop is Non-Profit and provides funding for Barrow Neurological Institute to help brain cancer research. The shop is run by Kyle's twin brother David and their father, Michael. GMF is a full service shop, from flats to complete overhauls with a complete selection or accessories and parts. We also sell new and used bikes. Our used bikes come from donations that we refurbish. We are always looking for donated bikes. If you have a bike or know someone who would like to give their bike a new home, bring it by or call us and we can come pick it up. We look forward to meeting you!

Meet the Business Owner

David C.
David C.
Business Owner

David is the President of GMF Bicycle Shop. After his twin brother, Kyle, passed away from Brain Cancer, he continued to run the shop in honor of him. David previously worked at a bicycle shop in Central Phoenix since he was 15 years old. David is an avid cyclist from road to mountain bikes, you will see him out there pedaling!