DESCRIPTION
Ultegra R8101 - Leave Time Behind
When developing the Ultegra R8101 series, Shimano took a holistic and 100 % performance-oriented approach, because great speed means great responsibility. Faster than ever before, the 12-speed road groupset scores with unparalleled control and comfort anytime and anywhere - whether in an everyman race, on the hunt for a personal best time or on a companionable ride.
As with the Dura Ace R9200, not only does Hyperglide+ make its way into the Ultegra's components, also its Di2 parts rely on Wireless technology to simplify operation and ensure smooth shifting.
Shimano Ultegra CS-R8101-12 cassette
The Shimano Ultegra CS-R8101 cassette is characterised by seamless shifting processes that not only ensure quiet cruising, but also allow the rider to devote their full concentration to climbs and sprints. This is made possible by the
Hyperglide+ technology which has already been able to convince in the MTB segment with smooth shifting processes in both directions across the entire gear range.
Even under maximum effort or in a direct duel with the opponent, smooth upshifting and downshifting can be realised, while larger teeth maintain maximum efficiency. And the 12-speed cassette is even compatible with Shimano's previous 11-speed freewheel bodies.
Sprocket ratios:
- 11-12-13-14-15-16-17-19-21-24-27-30 teeth
- 11-12-13-14-15-17-19-21-24-27-30-34 teeth
Hyperglide+
The conventional Hyperglide technology ensures smooth shifting upwards thanks to small shifting ramps, which guide the chain towards the next larger sprocket. Also Hyperglide+ uses this functionality but applies it in the opposite direction, too, preventing the chain from falling down when shifting downwards. The result is a smooth and consistent shifting in both directions, free of vibrations and without disrupting the cadence.
Material:
sprockets: steel (nickel plated)
spiders: aluminium (anodized / painted)
PLU: 65373
SIZE INFORMATION

SHIPPING & DELIVERY
Free Shipping
We offer free shipping on orders over $99 NZD*. Orders under this threshold incur a flat rate of $7.20**
*Excludes large or bulky items, which are charged between $25.00 and $100.00, depending on size, weight, and delivery location. Shipping is calculated at checkout.
**Rural delivery surcharge: An additional $6.00 is applied to rural addresses.
Click & Collect
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Delivery Time Frames
In-Stock Items:
Orders for items in stock at our store are dispatched within 1–2 business days (weekdays) of payment. Orders placed after 3 pm will be processed the following business day. Please allow an additional 2 days for rural delivery.
From Supplier
Items shipped directly from our suppliers are usually dispatched within 2–4 business days. Some may take up to 8 business days, depending on the supplier. Estimated delivery times are shown on each product page. Rural deliveries may take an extra 2 days.
Tracking Information
You'll receive a tracking number by email as soon as your order has been dispatched. If you haven’t received tracking details within your expected delivery window, please contact us to confirm.
Shipping Bikes
- Giant, LIV, and Norco bikes are not eligible for shipping due to brand warranty and dealer policies. These must be collected in-store, fully assembled.
- Electric bikes cannot be shipped due to Dangerous Goods restrictions (lithium batteries). These are available for Click & Collect only.
- Other bikes can be shipped with the following rates:
- Kids bikes: $25.00
- Standard bikes: $75.00
Shipping rates are automatically calculated at checkout. If your bike falls outside this standard pricing (e.g., large-size mountain bikes or freight to remote areas), we may adjust the shipping cost. If you're unsure, feel free to contact us before ordering.
Processing of bikes can take up to 7 days if they are needing to be shipped from our suppliers.
Returns and Warranty
For information about returning a product or submitting a warranty claim, please see our Returns and Warranty Policy here.
Questions
If you're unsure about shipping rates or have any questions, get in touch with us with any questions.
REVIEWS & QUESTIONS
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