The recommended belt sizes are SBS8.9 (counter belt and secondary belt) and FBM9.6 (flat drive belt). However, I found that SBS8.9 may be too tight and it too will affect rewind performance negatively by tugging too hard on one gear. You could possibly use a SBS9.2.
Tape 2 needs an SBM10.0 but, you can also use a SBS10.0.