FIXED GEAR Bike, 1/2" x 1/8" CHAIN - fit for 1x track bike, fixie ,BMX , 144mm BCD
Alu7075 from USA, HIGH STIFFNESS - High precision CNC machined 7075 T651 Aluminum supplied by USA Aleris / Alcoa. Long-lasting lifespan. HB150 excellent stiffness, 4mm thickness, anodized black
LIGHTWEIGHT - Lightweight with inner side cut off but stiffness design, 42T 77g(2.72oz),50T 133g(4.69oz),55T 155g(5.47oz),60T 188g(6.63oz),65T 262g(9.24oz),68T 295g(10.41oz)
Chose by lots of professional track riders in EU and USA, lifespan 20,000 km(12,427 miles)
Package Content - Chainring Comes with 5 Cr-Mo alloy high strength steel bolts