Those 22 give good clearance wot front sprocket Wud u use to put gearing like I've got 20 inch tyres
Let me help you with translation: "what front sprocket would you use", leave the text talk for your phone please
http://www.blasterforum.com/general-support-17/i-made-blaster-specific-gearing-calculator-40628/
Consider getting some tires and wheels and hubs off ebay or CL, get 9 or 10" rims for your racing tires and put your 22" on stock rims I:I
If your going mudding I would go with 22s ...blasters are way to low the way they are...I have 22s and they are fine if you arent so crazy about low end power..