Shimano Ultegra R8100 Di2 Mini Group

description

The core of a Shimano Ultegra R8100 Di2 12-speed disc-brake road group: wireless Di2 shifters with hydraulic calipers, Di2 front and rear derailleurs, the internal battery and charger. Use it to upgrade a bike that already has a compatible crankset, cassette, chain and rotors. The price is the sum of each component's US retail price.

What's included

• ST-R8170 Di2 dual control lever + BR-R8170 hydraulic disc caliper, left/front – $585.00
• ST-R8170 Di2 dual control lever + BR-R8170 hydraulic disc caliper, right/rear – $585.00
• FD-R8150 Di2 front derailleur (braze-on) – $295.00
• RD-R8150 Di2 rear derailleur – $470.00
• BT-DN300 internal Di2 battery – $220.00
• EW-EC300 Di2 charging cable – $64.00
• Total: $2,219.00

Specifications

• Series: Ultegra R8100, 2x12-speed
• Shifting: Di2 electronic; wireless shifters (coin-cell powered), wired derailleurs
• Brakes: Hydraulic disc, flat mount
• Not included: Crankset, cassette, chain, rotors, bottom bracket and E-TUBE wires (wire lengths depend on your frame; we'll quote them with your order)

Specs and photos are from Shimano's website (bike.shimano.com). Shimano does not publish US prices on its site, so each component is priced at the highest regular (non-sale) price advertised by authorized US retailers (Trek, Performance Bicycle, Bike Tires Direct, REI), checked October 2026. Manufacturers can change specs without notice; ask us to confirm compatibility before you order.

How ordering works

• In-store pickup. Orders are picked up at Narrow Path Cycles, 980 Rowland Street, Clarkston, GA. If you need your order delivered somewhere else, contact us first; any shipping you arrange is at your own cost.
• Subject to availability. Parts are ordered from the manufacturer or distributor, and every order is subject to availability. Items can be delayed, backordered or discontinued. We'll contact you after you order to confirm availability and timing.
• Installation. Ask us about installation and compatibility with your bike; installation is quoted separately.
• Restocking fee. Returns are subject to a restocking fee, depending on what the manufacturer allows us to return. Special-order items may not be returnable.
• Pickup verification. Bring a photo ID and the card used for your order when you pick up.