SUITABLE FOR MANY PUSHCHAIR / PRAMS / STROLLERS. THESE TYRES ARE SUITABLE FOR BUGGYS/ STROLLERS WITH. 2 x Easy fit Bent Valve Tubes. 12 1/2 x 2 1/4 (will also fit rim 1.75-2.125). Tube should be installed with care, ensure it is not trapped between the tyre and wheel rim, No sharp tools should be used.