If you've got any Ultra trim, you can fine tune your setup by changing the reduction nozzle ring.
The rings come in sizes: 88mm, 89mm, 90mm, 91mm, 92mm, 93mm, 94mm, 95mm.
We recommend getting multiple.
To order multiple rings, you have to select a (one) ring size and add it to the cart. Then repeat that process until you have all desired rings in the cart (you can't select and add multiple to the cart at once).
Why Bore Rings Matter
As a rule of thumb: larger bores improve acceleration, while smaller bores favour top speed. Swapping bore sizes also helps optimise performance for different engines and riding conditions. Read more about our trims and bore rings here.
With these different rings you are easily able to play around with different setups and find the perfect sweet-spot - without needing to bore any nozzles, going back and forth between different setups and testing.