With 36" tall tires, standard gear ratios will be EXTREMELY high.

It'd be fun to recalculate gearing.

At 7,000rpm the 26" bike goes 36.7mph. That's @ 14.76:1 gear ratio with a 36t rear sprocket.

To get the same results, the 36" bike would need a 50t rear sprocket to be at 14.76:1 gear ratio.

With 18.75:1 gearing on a 26" bike, at 7,000rpm the bike goes 28.9mph.

You would need 25.98:1 on a 36" bike to get the same results.