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The uninterrupted shifting experience of the ULTEGRA R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change.
The uninterrupted shifting experience of the ULTEGRA R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change.
Shimano

Shimano CS-R8101 Ultegra Hyperglide+ 12-speed Cassette in Silver

$117.99
Size Guide
Preorder

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritized (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or dispatch to you — it often never even hits the stock room shelves!

Prelaunch

With Prelaunch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Preorders.

So, instead, you can submit your email address for the item you are interested in, and we will email you as soon as stock arrives in the system.

Estimated Shipping & Collection Dates

Estimated Shipping & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indicative purposes only and can change at any time without notice.

The dates we provide are based on information given by our suppliers. Whenever we get updated information from our suppliers we will endeavor to update the Estimated Shipping & Collection Dates provided on product pages.

We estimate this will be ready for dispatch to you or collection via Click & Collect on Undetermined

Hassle free returns

Returns and Shipping

SHIPPING (Continental U.S.)

  • Once placed, most online orders ship within one to two business day. Bike purchases that require shipment will take an additonal two to four days for processing and packaging. Orders placed after 12pm CST on Fridays through Sundays will process on the following Monday.
  • Please note that some items may be subject to additional shipping and handling charges because of size or weight.
  • We do not ship outside of the Continental U.S.

IN-STORE PICKUP

Most orders will be ready within one business day. Please keep in mind that some items may require additional processing time to assemble. We will call, text or email you once your order is ready for pickup. If you need an item right away we ask that you call us to confirm that the product is available before heading over to our store. Unless special arrangements are made in advance, orders must be picked up within 30 days, after which time the items will be returned to the shop and in-store credit issued under the purchaser's name.

BACKORDERS

Occasionally, some items are unexpectedly out of stock or unavailable and may be backordered. If this should occur, we will only bill your credit card for merchandise that is actually shipped. The total shipping charge for orders split into multiple shipments will not exceed the amount quoted on original order.

RETURNS

We hope you love your purchase from Pete's Garage, but if you don't we'll make every effort to exchange or refund your purchase. Please see below for details of our return policy:

  • All bicycle sales are FINAL.
  • Full priced items are eligible for exchage or refund within 30 days of the purchase. Eligible items must remain in new, unused condition with all original packaging intact. Proof of purchase required.
  • Sale items are eligable for in-store credit or exchange only. Proof of purchase required.
  • Closeout items or clearance items (defined as any items marked below 50% of MSRP) are FINAL SALE.
  • Specail order items are subject to a 20% restocking fee upon return.

For orders placed online, please contact us to initiate return or exchange your item. Web orders may be brought to the store or sent to:

Pete's Garage
Attn: Website Returns
142 N. Broadway
Green Bay, WI 54303

Return shipping costs are the purchasers responsibility and will not be provided by Pete's Garage.

SPECIAL ORDERS

Payment in full is required before special orders will be placed. Returns on special order items will be subject to a 20% restocking fee.

WARRANTY CLAIMS

Warranty claims will be addressed in a manner consistent with the manufacturer's guidelines and only on items purchased at Pete's Garage. In instances where the manufacturer does not cover labor, charges will apply to execute warranty repairs.

PRICES AND INFORMATION

This website is intended to help you. We make every effort to maintain current, accurate prices in our on-line catalog. And we strive for similar accuracy and timeliness with the other information we offer here. We appreciate your understanding should any of the prices or other information provided be incorrect and regret any inconvenience such mistakes may create. All prices are subject to change at any time, and unfortunately we cannot honor any previous pricing once a change is made. Please bring any errors you may find to our attention on your next visit or by calling or sending us an e-mail.

Shimano CS-R8101 Ultegra Hyperglide+ 12-speed Cassette in Silver

Season:2025

Brand:Shimano

Code:192790849881

The uninterrupted shifting experience of the ULTEGRA R8100 12-speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change.

Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed FREEHUB bodies.

HYPERGLIDE+ cassettes revolutionized off-road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift.

In any gear, Shimano ULTEGRA R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing HYPERGLIDE FREEHUB bodies. All this while increasing to 12-gears, ULTEGRA CS-R8100 cassettes are the new paradigm in road shifting.

Features:

  • Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation
  • Faster, smoother shifts under maximum pedaling force
  • Compatible with new 12-speed and road 11-speed FREEHUB body
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