Check out this guide to get more rubies in Mario Kart Tour! Know how you can earn them, where you can get them, and more!
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How To Get Rubies
Initial 20 Rubies
You'll be given your first 20 rubies during the start of the game. Use them wisely and reroll until you get the kart, driver, or glider that you want.
Click Here For The Fast Reroll GuideAccepting Tour Gifts

After playing races, you can unlock Tour Gifts as you advance to the next cup. Tour Gifts require the completion of the races before them and a set amount of Grand Stars before you can accept their rewards.
Learn How To Farm Grand Stars Here!More Rewards With Gold Pass

Subscribing to the Gold Pass increases the rewards that you can get by opening a gift. Rubies are sometimes offered as extra rewards that can be acquired with a Gold Pass. You can check the additional rewards before opening a gift.
Know More About The Gold Pass Here!Level-Up To Get More
Play and complete races to get more experience to level-up. Aside from the increased Position points, leveling up also rewards you with rubies!
Placing First In A Rank-Eligible Cup

Rubies are awarded to players that have earned a place in rank-eligible cups. Get the largest amount by ranking first and getting the largest amount of points in the cup. Rewards are given after the time displayed on the top of the screen, giving you time to get more points by replaying races.
Click Here To Know How To Earn Points!Buy Them From The Store
The last option is to buy them from the game store. The more you buy, the cheaper each ruby gets.
What Are Rubies?
Use To Fire The Pipe

5 Rubies are required to fire the pipe, which then rewards the player with drivers, karts, and gliders for each time it is fired. To get more drivers and karts, you have to fire the pipe in order to get them!
Click Here For A More About Pipe / Gacha Openings!