Desperate measures - use something to tie the tyre in place at one end just where it’s on the rim, an old toe clip strap is perfect, or a tie-wrap.
Then work round the tyre pushing it towards the other side hanging off to get more slack Then it’s just working the tyre onto the rim towards the tie-down side
Desperate measures - use something to tie the tyre in place at one end just where it’s on the rim, an old toe clip strap is perfect, or a tie-wrap.
Then work round the tyre pushing it towards the other side hanging off to get more slack Then it’s just working the tyre onto the rim towards the tie-down side
Not sure if any of that makes sense though...