The first thing I did was to go to DYN_team and edit fkIDequipment_marques_roue to a number that appeared regularly (80). I noted that Trek Factory Racing (amongst others) also had 80 in this column.

On going into STA_EQUIPMENT_MODEL, I checked all the brands until I found Trek listed under Bontrager. I did as you suggested and manually added my team to Bontrager's wheels in STA_EQUIPMENT_MODEL, but in the game, Roval was still my supplier and there were no models listed.

Finally, I went into DYN_brand_contract and changed my supplier to Bontrager and that fixed it.