But Arsenal are now confident, following this deal, that the stadium money will be in place by the end of September, allowing work to restart and putting an end to all the rumours.
Arsenal's current deal with Nike is worth £5.7m a year. But the new deal has increased this figure by £7.8m each season.
It is the second huge deal that Nike has struck with an English club. Two years ago it announced a £303m deal with Manchester United for 13 years.
In that deal it took over United's entire merchandising and licensing operation and the right to sell United kit.
Arsenal, however, will keep some of these lucrative rights.