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Shimano Ultegra CS-R8101 12-Speed Cassette
Free Worldwide Shipping & Duties Paid.
$65.00
$122.00
Size: Size Guide
Default 11-30T 11-34T One Size (55-61cm)
XXS (Chest 76–80cm)
XS (Chest 80–84cm)
S (Chest 84–88cm)
M (Chest 88–94cm)
L (Chest 94–100cm)
XL (Chest 100–106cm)
XXL (Chest 106–111cm)
3XL (Chest 111–116cm)
XXS (Waist 24 inch)
XS (Waist 25 inch)
S (Waist 26 inch)
M (Waist 28 inch)
L (Waist 30 inch)
XL (Waist 32 inch)
XXL (Waist 34 inch)
XL (Waist 36 inch)
XXL (Waist 38 inch)
3XL (Waist 40 inch)
US5 / EU35 / 22cm
US5.5 / EU36 / 22.5cm
US6.5 / EU37 / 23cm
US7.5 / EU38 / 24cm
US8 / EU39 / 24.5cm
US8.5 / EU40 / 25cm
US9.5 / EU41 / 26cm
US10 / EU42 / 26.5cm
US10.5 / EU43 / 27.5cm
US11 / EU44 / 28cm
US11.5 / EU45 / 29cm
US12 / EU46 / 30cm
US13 / EU47 / 31cm
Main Features & Information
Shimano Ultegra CS-R8101 12-Speed Cassette
The Shimano Ultegra CS-R8101 12-Speed Cassette delivers smooth, precise shifting with a refined gear range for everything from all-out sprints to grueling climbs. Designed with Hyperglide+ technology, it ensures seamless transitions between gears, keeping your cadence dialed and your power steady. Lightweight, durable, and race-ready, this cassette is built to take your road performance to the next level.
Men US EU UK CM 5 37.5 4.5 23 5.5 38 5 23.5 6 38.5 5.5 24 6.5 39 6 24.5 7 40 6 25 7.5 40.5 6.5 25.5 8 41 7 26 8.5 42 7.5 26.5 9 42.5 8 27 9.5 43 8.5 27.5 10 44 9 28 10.5 44.5 9.5 28.5 11 45 10 29 11.5 45.5 10.5 29.5 12 46 11 30 13 47.5 12 30.5 14 48.5 13 31 15 49.5 14 31.5 16 50.5 15 32 17 51.5 16 32.5 18 52.5 17 33
Clothing XS S M L XL XXL UK 34 36 38-40 42-44 46-48 50-52 IT 44 46 48-50 52-54 56-58 60-62 France 28 30 32-34 36-38 40-42 44-46
Jeans XS S M L XL XXL UK 28 30 32-34 36-38 40-42 44-46 IT 44 46 48-50 52-54 56-57 58-59 France 36 38 40-42 44-46 48-50 52-54
Women US EU UK CM 5 35.5 2.5 22 5.5 36 3 22.4 6 36.5 3.5 22.9 6.5 37.5 4 23.3 7 38 4.5 23.7 7.5 38.5 5 24.1 8 39 5.5 24.5 8.5 40 6 25 9 40.5 6.5 25.4 9.5 41 7 25.8 10 42 7.5 26.2 10.5 42.5 8 26.7 11 43 8.5 27.1 12 44.5 9.5 27.9
Clothing XXS XS S M L XL XXL UK 4-6 6-8 8-10 10-12 12-14 14-16 16-18 France 34 34-36 36-38 38-40 40-42 42-44 44-46 Italy 36-38 38-40 40-42 42-44 44-46 46-48 48-50 US 2 2-4 4-6 6-8 8-10 10-12 12-14
Jeans Waist 23 24 25 26 27 28 29 30 31 32 33 34 35 36 UK 4-6 6 6-8 8 8-10 10 10-12 12 12-14 14 14-16 16 16-18 18§
Kids US EU UK CM 9C 26 8.5 17 10C 27 9.5 17.5 11C 28 10.5 18 12C 29.5 11.5 18.5 12.5C 30 12 19 13C 31 12.5 19.5 1Y 32 13.5 20 1.5Y 33 1 20.5 2Y 33.5 1.5 21 2.5Y 34 2 21.5 3Y 35 2.5 22 3.5Y 35.5 3 22.5 4Y 36 3.5 23 4.5Y 36.5 4 23.5 5Y 37.5 4.5 24 5.5Y 38 5 24.5 6Y 38.5 5.5 25 6.5Y 39 6 25.5 7Y 40 6 26
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