89.00mm Four Stroke Ring Set 1.0 x 1.2 x 2.5mm

So, the rings are amazing. They’re thick but flexible, seem super super strong, but there’s a caveat. I personally have a KTM 373cc engine from 2016, and the oil expander ring set included in the kit doesn’t fit in the oil expander slot in my piston. This is probably just a KTM issue, as the duke’s factory expander set is an incredibly unorthodox setup, but just verify with the piston out of your engine that that it will work with a traditional 3 piece, two wiper one expander oil ring set. Other than that, 5 stars I’m just docking one off for the fact that it said it’d work with my bike but I had to reuse the oil ring.