Originally Posted by pfy50
ps. Isn't a IRC GP1 a copy of the Kenda 270?
If anything, the Kenda K270 is a copy of the IRC GP1.
A cheap copy.
I was using IRC GP1s on my 1990 Yamaha DT-200R back in the day, and they were/are awesome tires for smooth running on the street with casual off-road use, and that's the reason I mounded the IRCs for a trip up to Mt. Washington from CT. back then.
The wheels were balanced after the tires were mounted (with an old-fashioned static balancer), and the bike was as smooth as glass for the trip up and back.
Myself, I'd recheck the balancing job with another wheel balancer.
You may be surprised.