You are in the Trial and Biketrial 18 inches tires corner.
Comas tire in size 18 inches x 2.25. Brand mounted in Comas R1 740mm bicycle. Suitable for front and rear wheel. Compatible with other 18 inches brands and wheels. Special squared design to get the best grip in any ground. Black colour. Weight 698 grams.
Kenda front tire in size 18" x 1.75. Special design to get the best grip in any ground. Black colour. Weight 453 grams.