What is the point of 10 inch reels?

My dreams of owning a 10.5 inch capable deck finally came true! Pioneer RT-1020L, 80 dollars with hub adapters and two metal reels. : r/ReelToReel

1/4 10 Inch Empty Tape Reel Aluminum Alloy Reel Tape Recorder Accessory Empt GDS

Specification:, Item Type: 1/4 10 Inch Empty Tape Reel, Material: Aluminum Alloy, Applicable Tape: 1/4 Inch, Reel Diameter: 10 Inch, Application

1/4 10 Inch Empty Tape Reel Aluminum Alloy Reel Tape Recorder Accessory Empty Disc Opening Machine Parts For Nab, Tape Reel To Reel Recorder

What is R2R tape and what's so great about it? – Dave Denyer: The Reel-to- Reel Rambler

Back to My Reel-to-Reel Roots: Noodge and Ye Shall Receive, Part Two – PS Audio

Diamond Welding Lead Reel - 10 Inch Fixed Base Triple FBT10BLK – Canada Welding Supply Inc.

Nab Reel Hub Adaptors for 10 Inch Reel to Reel Tape Recorders 1 Pair Reel to Reel Tape Recorder Accessories Aluminium for StuderReVox for Akai for Teac etc Black

Akai GX-630DB 10-inch Reel to Reel Tape Deck - Working!

Is 10.5 inch worth it? : r/ReelToReel

Specification:, Item Type: Empty Reel, Material: Aluminum Alloy, Color: Red, Applicable Tape: 1/4in, Reel Diameter: 10 Inches, Applicability

Metal Takeup Reel, 6 Hole Low Noise 1/4 10 Inch Empty Reel For Reel To Reel Tape Recorder