I attempted the duct tape method and it only works for maybe 1-2 speed runs, I've grown to appreciate the belted radials from Sweep where GT8 tires have proven to me the best speed run tire on the market if you want long term stability to get the most out of your investment ;)
+1 to belted tires, in fact 1/8 GT tires are going to be the best route.
I would look into getting 17mm hex adapters and consider Sweep EXP50 Belted Radials:
https://www.sweepracingusa.com/8th-GT-Belted-Treaded-EXP-50deg-Medium-2pc-tire-set-with-Pre-Glued-options_p_266.html
If you're doing...