Last time, there is no major change in terms of appearance, but the riding comfort varies greatly.Cog"and"> Chain"I introduced" Chain Ring ", which is the most important point when you want to change the speed more smoothly! First of all, I will introduce the Spanish Madrid chain ring that has just arrived. "ROTOR" with an impact that combines design and accuracy. ROTOR NO-Q Track Chainring ¥ 18,000 (+Tax) This brand is famous for using Dosnoventa. It is comparable to the accuracy of Made in Japan, including SHIMANO and SUGINO !!! Next is "SUGINO", which is MADE IN JAPAN, which has recognized parts accuracy not only in Japan but also overseas. Sugino Zen 144 Chainring BK 44-46T ¥ 12,000- (+Tax) 47-50T ¥ 17,200- (+tax) 51-52T ¥ 18,900- (+tax) 53-55T ¥ 22,500-(+tax) Polish 44-46T ¥ 10,900- (+tax) 47-50T ¥ 16,100- (+tax) 51-52T ¥ 17,800- (+tax) 53-55T ¥ 21,500- (+tax) NJS -certified parts that are also used by many overseas riders and are also used in the Olympics. Not only the accuracy of teeth and aluminum is good, but also the lightweight disk shape on the back side with CNC has high rigidity and aero effect. SUGINO SSG144 CHAINRING BK 44-46T ¥ 12,000- (+tax) 47-50T ¥ 13,300- (+Tax) 51-52T ¥ 13,900- (+Tax) 53-54T ¥ 14,600- (+tax) POLISH 44-46T ¥ 10,900- (+tax) 47-50T ¥ 12,200- (+tax) 51-52T ¥ 12,800- (+Tax) 53-54T ¥ 13,500- (+tax) This is also a popular product like Zen. The weight is almost the same as Zen, and it emphasizes cost performance compared to Zen. This is also a NJS certified part, and the accuracy is as well as Zen, and we recommend here if you have a little kanji called "Zen" !!! SUGINO MC144 Chainring BK 47-50T ¥ 17,200- (+Tax) POLISH 47-50T ¥ 16,100- (+tax) 51-52T ¥ 17,800- (+tax) 53-55T ¥ 20,000- (+tax) An excellent design that combines classics and newness well, and is well -elized from old chromoly frames to aero aluminum frames and carbon frames. There are many flesh -removed parts, so we succeeded in reducing weight. * All are PCD144. This is the chain ring in the Osaka store right now. Drive line (cog, chain ring, chain, crank) is the most important in the heart for fixie bikes. I also want to change the crank, cog and chain to speed up faster. I want to polish the smoothness. Why don't you customize the chain ring that suits your car!? U-KI.