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MATERIAL:Bicycle Brake Disc Made Of Metal ,Is Not Easily Deformed, no rust, stable braking, not afraid of mud and sand, without special cleaning. APPROPRIATE HEAT DISSIPATION:Bicycle Brake Disc Has The Correct Hole Spacing To Provide Good Heat Dissipation Performance, Which Can Effectively Dissipate Heat While Riding. MORE CHOICES:Different Types For You To Choose, So You Can Choose One You Like, Meeting Your Different Needs. WIDELY COMPATIBLE: Our Bicycle Brake Discs Are Suitable For Road Bike, Mountain Bike Etc. SERVE:Any Problems You Have, Please No Hesitate To Contact Us, We’Re Always Here To Help You And Response To You Within 24 Hours. *Bicycle Brake Disc Practical To Use,Beautiful, Abrasion,Quick Ventilation, And Good Heat Dispersion,Easy To Use And Install,Good Compatibility,For Elelctric Bicycle,Road Bike,Mountain Bikes Etc.