SHIMANO Center Ultegra R8100 170mm 52/36z. 12-k.HTII without bearing

Optimal balance of stiffness, strength, weight and rotational performance. HOLLOWGLIDE chainring structure reduces weight but maintains strength for better power transfer and faster and more precise shifting.
Recommended bottom bracket: SM-BBR60, SM-BB7241B
Technologies used: Hollowtech II, Hollowglide

Type: ROAD, Total package weight: 1400g, Crank length: 170 mm, 12 speed, Number of teeth: 52/36 teeth, Hollowtech II, 68/70mm, black, without cover, Chainring material: aluminum (upper), aluminum (lower), Chainring spacing: 110mm/110mm

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Manufacturer details
Shimano INC
3-77 Oimatsu-cho, Sakai-ku, Sakai City, Osaka 590-8577, Japan
Phone number: +81-72-223-3210 / FAX:+81-72-223-3258
WEB: shimano.com
Email: contactshimano@shimano-eu.com

EU representative:
Shimano Europe BV
High Tech Campus 92, 5656 AG Eindhoven, the Netherlands
Tel: +31-40-2612222
WEB: shimano.com
Email: contactshimano@shimano-eu.com
EU contact: https://bike.shimano.com/information/distributors-list.html