Hello! I was wondering if this: Earth Leone R145SD, was good as a stamina bey. A full coverage of my parts are 
Metal Wheels: Cosmic, Earth, Flame, Storm, Beat, and Gravity
Clear Wheels: Destroyer, Leone, Peasus ll, Lyre, Wolf, and Orion
Tracks: 100, W105, 130, R145, M145, TR145 and AD145
Performance Tips: SD, W2D, Q and HF
PLease Help, Im going for stamina and it would be nice if any people who are more experienced in beyblades would tell me what my best bet for Stamina is, and also Attack and Defense, but im focusing on stamina. Also I have only plastic Face Bolts so thats why I didn't mention them. Thanks!

To be honest, you don't have much competitive parts. But still, Earth Leone AD145SD would work for you.

What can beat syth cronos with the wide spin track and ms, I don' know the part names so sorry

I would avoid R145 for stamina completely. Too recoily and the friction it produces, and according to some people, and from using it myself, it isn't the greatest for balance, especially when it's Four sided Earth vs heavy three sided R145.

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My Cho-Z Reaper Deathscyther .12.Cr concept render, click below to see!

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No I don't plan on doing more yet.

I should probably go back to making fan custom Zero G beyblade concepts again