Yup, the SunRace freewheels are remarkably smooth operating for the money. No idea how long the guts will last, haven't ridden one long enough. But the 13-25 SunRace 7-speed I've used on my Ironman shifts more smoothly than the original 13-24 Suntour. I just didn't care for the gear spacing of the 13-25 combined with the 52/39 chain ring, but I might try again with a 38T smaller chain ring.