You will need to invest in some good tools.
For mounting & dismounting:
A bead breaker (preferably hydraulic.)
A J-hook to pull the bead over the rim (or spoons.)
Tire band (preferably welded and sized rings.)
Good compressor (the portable will do, but you will need high psi to bead the tires out.)
I would think that you would have everything else you need to flip tires at the track.
For resurfacing:
A belt sander (with multiple grit belts) or angle grinder.
Coolant (I use Windex non-ammoniated.)
Something to turn the tire (preferably a refinishing stand from JesusFreak or similar.)
For many in our sport, it's cheaper to pay someone else to do this for you until you are fully invested in the sport for the long term - at which point you will need all of these items anyway. Tools are always wise investments and hold their value very well when it comes time for resale.
As far as compressors go:
If you are mounting several tires, you'll need volume. If you're just doing a set at a time, one of the little Chi-Com noisemakers from HF will do just fine - as long as the pressure is high enough. The one I use is 175psi max. Volume is always helpful, but as long as you don't mind hearing that little compressor scream, they'll mount any tire we use in karting.
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Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cut
z
www.CarlsonMotorsports.com
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34 years of service to the karting industry ~ 1Cor 9:24
Linden, IN
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bcarlson@CarlsonMotorsports.com