Special Tread Compound off-Road Black Bicycle Tyres for 26X2.125 Quality Management System Certified Spot Adequate Road Tires Mountain Bike Tires - China Bicycle Tires, High Quality Tyres | Made-in-China.com
Fincci 26 x 2.125 inch Foldable Slick Hybrid Bike Tyre 54-559 for Cycle Road Mountain MTB Bicycle with 26x2.125 Tyres : Amazon.co.uk: Sports & Outdoors
Bike tyre sizes explained: in-depth guide to road, MTB & hybrid tyres - BikeRadar