130BCD 5 arm chain 9 10 11 12 speed, support crankset SRAM red rotor quad dynamometer Shimano 5700 6700 Optimized tooth design, low noise, anti-drop. Self-clean from muddy soil USA aluminum 7075, high rigidity - high precision CNC machined, 7075 T651 aluminum provided by USA Aleris/Alcoa. Built to last. HB150 Superior stiffness, 4 mm thick, anodized black Lightweight - Cut-off inside but stiff design lightweight, weight 46-163g. Treatment: Anodized, 4 bolts included Choice of many professional track riders in Europe, lifespan 20,000 km

Stone Round Chainring 130BCD Narrow Wide Chainring This is a 130BCD 4 arm chainring support 9-12 speed chain. Support Red Rotor Quad 5700 6700 Road Folding Bike Made of high quality USA aluminum 7075 and precision full CNC process. At State Design Art from the Stone Company. We provide the best quality and riding experience. Features 130BCD, 5 arms, chain 9/10/11/12 speed, support crankset red rotor QUARQ 5700 6700, optimized tooth design, low noise, anti-drop for Brompton 3Sixty folding bike. Self-clean aluminum 7075 from muddy soil, high rigidity - high precision CNC machined, 7075 T651 aluminum provided by USA Aleris/Alcoa. Built to last. HB150 Superior Stiffness, 4 mm Thick, Anodized Black Lightweight - Light and rigid design with cut-out inside, weight 77-176 g. Processing: Anodized, 4 bolts included.Chosen by many professional track riders in Europe, lifespan 20,000 km Tooth maximum diameter (mm) Weight (g) 38 T, 162 mm, 49 g40 T, 170 mm, 61 g42 T, 178 mm, 70 g44 T, 186 mm, 74 g46 T, 194 mm, 79 g48 T, 202 mm, 84 g50 T, 210 mm, 97 g52 T, 219 mm, 104 g54 T, 226 mm, 111 g56 T About , 235 mm, 119 G58 T, 242 mm, 127 G60 T, 250 mm, 136 G stones We provide high quality and innovative design CNC machined chainrings to clients all over the world, especially loved by European race teams. A stone (STONE) design company specializing in providing. We offer customized rings regarding tooth quantity and style, add your team logo or name base on the stone logo. Material is the basis of everything and the aluminum 7075-T651 offered by Aleris and Alcoa USA is the top aluminum supplier in the world and Aleris is a supplier to many aircraft manufacturers. Taiwan CNC machine provides process accuracy of 0.03mm. We are not only a factory, but also a chainring designer with cutting edge and innovative designs. We want to provide our customers with stiff, lightweight, low noise, drop-stop, and durable chainrings. Stone products meet the requirements of all heavy duty cycling sports, downhill, CX, gravel, traction, etc. Make sure all chainrings have a lifespan of 20,000 km.


Size: ‎(38 teeth)
Battery included or built-in: ‎No
Package size: ‎25 x 25 x 1 cm; 200 g