Essential item for speed improvement! We have carefully selected hollow stainless steel shafts with no bends using a Φ1.97 checker! Furthermore, we have reinforced them to achieve the same hardness as black reinforced shafts! (See image) The weight is kept down to 1g, compared to 1.5g for black reinforced shafts ⭐️ By reinforcing them, acceleration after landing and cornering sharpness are improved, and bouncing is also reduced ⭐️ Even bent shafts that cannot be seen with the naked eye can cause a time loss of about 0.5 to 1 second! By reinforcing the carefully selected hollow shafts, you can gain 0.2 seconds! *Please use tires and wheels with precision for better results ⭐️