Have you tried inflating the tube within the tyre, while thy're both off the rim? It stretches the tyre just a tiny amount, and that could make the difference.
Also, talcum powder works very well at getting a tight tyre to slip more easily onto a rim. But I'm sure you've tried this one already. Apols.
Have you tried inflating the tube within the tyre, while thy're both off the rim? It stretches the tyre just a tiny amount, and that could make the difference.
Also, talcum powder works very well at getting a tight tyre to slip more easily onto a rim. But I'm sure you've tried this one already. Apols.