18mm internal (These ) - Veloflex indicate their tyres work as per the ETRTO chart, so the 28s should go up to 19 internal. My impression is that the tube might bunch up inside as they feel incredibly snug - this was with bigger tubes for 28-32mm tyres, so maybe downsizing tubes for 20-25 range might help? 🤔
18mm internal (These ) - Veloflex indicate their tyres work as per the ETRTO chart, so the 28s should go up to 19 internal. My impression is that the tube might bunch up inside as they feel incredibly snug - this was with bigger tubes for 28-32mm tyres, so maybe downsizing tubes for 20-25 range might help? 🤔
@miro_o did a lol 😂