Thank you for viewing. This is a finished product of Pera tires (never run). Tires: Low friction, black Wheels: X-chassis carbon dish Quantity: 8 pieces (for 2 cars) Tire diameter: 23.0 mm (surface tire) Tire width: 8 mm Bonus 4 pieces of 72 mm hollow stainless steel shafts Manufacturing process 1. 1.7mm wheel penetration (1.8mm penetration does not provide accuracy with Eagle's setter) 2. Hexagonal hole shaping of the wheel 3. Wheel selection (only good ones are used) 4. Wheel rim small diameter processing (using a setter) 5. Wheel circular processing (using a setter) 6. Rough tire cutting with a Veracru cutter set at 22.5 mm (using 24 mm narrow tires) 7. Tire installation on low height wheels with Hirogelunder (fixed with double-sided tape) 8. Check for tire wobble with a work machine 9. Tire processing with a tire setter 10. Tire edge chamfering We have spent time and effort creating this with precision using Eagle's tire setter, P Model Lab's penetration jig, Veracru cutter, and Hirogelunder. However, since this is a product made by an amateur, please refrain from purchasing if you are sensitive to details. As a bonus, we will include 4 pieces of 72 mm hollow stainless steel shafts that have been straightened to some extent. The case is also a bonus. Photo 5 ☆How to use ① Carefully attach the bonus shafts to the running machine so as not to bend them. ② Turn on the switch and rotate the tires, and lightly and evenly contact the left and right tires with a flat metal grinding stone of about 600 to 1000 grit until you no longer feel any vibration. (Finishing cut) At this time, never press down hard. ③ Wipe off the tire surface shavings with lighter oil. ④ If you lightly touch the rotating tire surface with your finger and it feels like it's sticking, it's OK. If you still feel vibration, shave again evenly, but be careful not to over-shave. ※ We recommend using a jig for inserting and removing the wheels. You can insert and remove them by hand, but you may bend the shaft if you are not careful. ☆Caution If you perform the above procedure using new shafts, you may damage the Pera tires because you will be shaving the tires in a state where vibration occurs, so please avoid this. We try to ship the same day, so thank you. Thank you.