Essential item for speed improvement! We have carefully selected hollow stainless steel shafts with no bends using a Φ1.97 checker! Furthermore, we have strengthened them to achieve the same hardness as black reinforced shafts! (See image) The weight is kept down to 1g compared to the 1.5g of black reinforced shafts ⭐️ By strengthening them, acceleration after landing and cornering sharpness are improved, and bouncing is also reduced ⭐️ Even with shafts that appear straight to the eye, but are bent, times can be 0.5 to 1 second slower! By strengthening even carefully selected hollow shafts, you can gain 0.2 seconds! *For better results, please also use tires and wheels with precision ⭐️ 17