Shimano Ultegra R8100 Di2 12-Speed TT Groupset (Disc Brake)

Shimano
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Regular price £1,49900
Regular price Sale price £1,49900
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The Shimano Ultegra R8100 Di2 TT groupset is a complete 12-speed time trial and triathlon package with hydraulic disc brakes. It uses the Ultegra R8100 Di2 drivetrain with Shimano's dedicated TT controls. Shimano's only hydraulic disc TT lever is the Dura-Ace ST-R9180, so it's included as standard, along with SW-R9160 extension shifters for changing gear from the aero position. Choose a standard or FC-R8100-P power meter chainset at checkout.

Ultegra R8100 Di2 TT at a glance

  • Shift from both positions – extension shifters for the aero tuck, base bar levers for climbs and corners.
  • 12-speed Di2 – the same fast shifting and E-TUBE features as Dura-Ace, at a lower price.
  • Synchronized Shift – optional automatic front shifting, popular on TT bikes; set it up in the E-TUBE app.
  • Hydraulic disc brakes – Dura-Ace BR-R9270 calipers with RT-CL800 rotors.
  • Power meter option – the FC-R8100-P chainset measures left and right power.

What's in the box

Component Model Notes
TT hydraulic levers (pair) ST-R9180 (Dura-Ace) Di2 shift / hydraulic disc brake levers for the base bar
Extension shifters (pair) SW-R9160 Di2 bar-end shifters
Disc brake calipers (front & rear) BR-R9270 (Dura-Ace) Hydraulic, flat mount, with SM-BH90 hoses
Disc rotors (front & rear) RT-CL800 Centre Lock; 160/160, 160/140 or 140/140 mm
Rear derailleur RD-R8150 12-speed Di2
Front derailleur FD-R8150 12-speed Di2
Chainset FC-R8100 or FC-R8100-P 52/36 or 50/34T; 160–175 mm
Cassette CS-R8100 12-speed, 11-34T
Chain CN-M8100 12-speed
Battery BT-DN300 Internal Di2 battery
Charger EW-EC300 USB charging cable

Not included: the Di2 wiring loom (junction box and E-TUBE wires), bottom bracket (see our bottom bracket range) and fitting. The TT levers and extension shifters are wired, and the wire lengths depend on your frame and cockpit, so we supply the loom separately. Contact us and we'll help you choose the right parts.

Compatibility

  • Frame: needs internal Di2 routing, flat-mount disc brakes and space for the internal battery.
  • Cockpit: needs a TT base bar and extensions that accept bar-end shifters.
  • Wheels: the 11-34T cassette fits a standard Shimano HG road freehub.
  • Want the lightest option? See the Dura-Ace R9200 Di2 TT groupset. For a drop-bar bike, see the Ultegra R8170 Di2 groupset.

Frequently asked questions

Why are the TT levers Dura-Ace?

Shimano doesn't make an Ultegra hydraulic disc TT lever, so the Dura-Ace ST-R9180 is the correct lever for a disc-brake Ultegra TT build.

Is the wiring included?

No. The TT controls are wired, and the wire lengths depend on your frame and cockpit, so the junction box and E-TUBE wires are sold separately. Contact us before ordering and we'll help.

Do I have to use Synchronized Shift?

No. Many TT riders use it so one pair of buttons controls both derailleurs, but you can set manual, Semi-Synchronized or Synchronized Shift in the E-TUBE app.

How long does delivery take?

Groupsets are normally dispatched within 5 working days. Standard UK delivery is free on orders over £200. Contact us before ordering if you need it by a race date.

Why buy from Eminence Cycle Co.

  • Genuine Shimano components
  • UK-based support from riders who build and race on Di2
  • Free UK delivery over £200 and 14-day returns
Shipping information

SHIPPING POLICY

Shipping Overview

At Eminence Cycle Co., we are committed to providing fast and reliable shipping for all our products. All orders are shipped from the United Kingdom and are subject to the following shipping policies.

Processing & Dispatch Times

• Components, Accessories & Framesets: Dispatched within 5 working days.

• Complete Bikes (Pre-Owned & New): Dispatch may take up to 14 working days to ensure proper assembly and quality checks.

International Shipping & Customs

• Orders shipped outside the UK may be subject to import duties and taxes, which vary by country. These charges are the responsibility of the buyer.

• Eminence Cycle Co. will not be liable for delays or returns due to customs clearance.

• If an item is returned due to customs refusal, a reshipping fee will be applied and sent to the customer prior to resending the item.

Damaged Shipments & Claims

• If a package arrives damaged, it must be reported immediately in writing to info@eminencecycleco.com upon receipt with clear photos and a damage report to initiate a claim.

• Eminence Cycle Co. reserves the right to refuse claims if damages are not reported immediately upon receipt.

For any shipping-related inquiries, please contact our support team before placing your order.

Thank you for choosing Eminence Cycle Co.!

RETURNS

We have a 14-day return policy, which means you have 14 days after receiving your item to request a return. 

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. 

To start a return, you can contact us at jmcyclesltd@gmail.com. 

If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

You can always contact us for any return question at jmcycles@gmail.com

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, like special orders—including custom-built bicycles, non-stock components, and any items specifically ordered at a customer’s request—are non-refundable and non-returnable unless deemed faulty or defective upon arrival.

By placing a special order, you acknowledge and agree that:

• No cancellations, refunds, or exchanges will be accepted once the order has been confirmed and processed.

• Special order items are procured specifically for you and cannot be resold as standard inventory.

• If a special order item arrives damaged or defective, you must notify us immediately, providing clear photographic evidence. We will work with the manufacturer to determine an appropriate resolution, which may include repair or replacement at our discretion.

• Certain Special Order items may be sourced from outside country of purchase and may be shipped directly to client - these items may be subject to import duties which shall be borne by the buyer

This policy does not affect your statutory rights under consumer law.

If you have any questions regarding special orders, please contact us before making a purchase.

We do not accept returns for Pre Owned Bicycles and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item. 

Unfortunately, we cannot accept returns on sale items or gift cards.

Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at jmcyclesltd@gmail.com

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