Group: Ultegra R8100 Model: FC-R8100 Gradation: 50-34T Q-factor: 146mm Threaded BB shell width: 68 / 70mm Gear front: 2-speed Gear rear: 12-speed Construction: Hollowtech II Compatible chain: CN-M8100 HG 12-speed PCD: 110mm Chain line: 43.5mm Material Crank arm: Aluminum Anodized Crank axle: Steel Plated Large Chainring: Aluminum Anodized / CFRP Small Chainring: Aluminum Anodized Features - Shimano ULTEGRA FC-R8100 12-speed Crank 50/34 Technologies HOLLOWGLIDE - Hollow technology on outer chainring High rigidity hollow structure cuts down on weight yet maintains strength. Better power transfer and quicker and more precise front shifting. HOLLOWTECH II crankset Optimum power transfer Best balance for lighter weight and efficiency New designed crank arm Maintains high rigidity and reduces weight 4-arm construction crankset Iconic design "🔥Pre order 5 to 7 working days Deliver to Malaysia, SG, Brunei, Worldwide Accept Ewallet Boost TouchnGo Etc.. & Credit card How to Order 1.Product Option: 2.Quantity: 3.Color: 4.Name: 5.Address: 6.Contact number: Send to ☎FB http://m.me/icebikeheaven ☎ http://www.wasap.my/60174204398 Sales, Order, Customer service ☎ http://www.wasap.my/60195272398 After sales/ Warranty FOLLOW US ✔ https://www.ebay.com/str/icebikeheaven37 ✔ https://shopee.com.my/icebikeheaven?tab=shop ✔ http://www.lazada.com.my/ice-bike-heaven/ ✔ https://fb.me/icebikeheaven ✔ https://www.instagram.com/icebikeheaven37/ Buy from Us! 🚴🏻💯% POSITIVE FEEDBACK 🚴🏻💯% Warranty & After Sale Service 🚴🏻💯% PARCEL ARRIVAL GUARANTEED 🚴🏻💯% ❌hidden charges 🚴🏻 7️⃣ days size exchange 🆗 🚴🏻 7️⃣ days 100% 💲💲 Guarantee back ☄ Prompt response 🥇♞ SSM Registered company- Icebikeheaven 🥇 7 Years of experience "