NickAndMore made a list of shows that would air new episodes, new series for not just Nickelodeon, but for Disney, Cartoon, Disney XD, Netflix
But I would list those only for Nick premieres only with dates revealed:
Dude Perfect Show (season 2) - Jul 15
Kids Choice Sports 2017 - July 16
JoJo Siwa: My World - Aug 12
Sunny Day - Aug 21
It seems that Canada Breakthrough Entertainment has already in the past produced Max and Shred and Ride. So since the same production is working on new series, that may hint that Ride is not going to be renewed for another season.
It's an amazing feat for TTM to have hit 100 episodes! Geez, I forgot how many episodes have been ordered total as of now, but considering Nick's last 100+ sitcom was the all-time No. 1 kids show iCarly and that Nick went on a cancel spree with a couple dozen sitcoms that were poorly treated and cancelled after a season over the last few years... definitely eye-brow raising TTM thrived.
In fact, TTM (HD and NRDD for that matter) was initially weak by Nick standards (at the time) in the ratings when they first started. So for Nick to have allowed these three shows to grow and for them to rally behind them has been nice to see. The three, along with GS and SoR have been a nice crop of shows. Glad Nick hasn't ordered many more sitcoms that would inundate the network with too many sitcoms.