Saint Piran Service Course
Ultegra Di2 Disc Groupsets: Up to 54% Off
Shimano’s 12-speed electronic Ultegra, built to your crank length, chainring and cassette. Pick the standard kit or step up to a power meter crank.
- 12-speed Di2 shifting with hydraulic disc brakes
- Choose your crank length, chainset and cassette
- UK delivery · spread the cost with Snap Finance
Two kits
Pick Your Groupset
Prices shown are our current online prices against Shimano’s UK RRP. Choose your exact crank, chainring and cassette on the product page.
Ultegra R8170 Di2 Disc Groupset
The full 12-speed Di2 disc groupset: STI levers with hydraulic flat-mount calipers, both derailleurs, chainset, cassette, chain, battery and charger cable.
Choose 165, 170, 172.5 or 175mm cranks, 50/34T or 52/36T chainrings, and an 11-30T or 11-34T cassette.
See the Disc Di2 kit →Ultegra Power Meter Groupset
The same Di2 disc groupset with the FC-R8100-P power meter chainset: dual-sided power with Bluetooth and ANT+.
Choose 170, 172.5 or 175mm cranks (50/34T, plus 52/36T on 172.5 and 175mm) and an 11-30T or 11-34T cassette.
See the Power Meter kit →Why Ultegra Di2
What You Get
Smooth 12-speed electronic shifting
BikeRadar praised the R8170 Di2 for superb shift quality, and road.cc called the shifting amazing. The 11-30T and 11-34T cassettes cover most road riding.
Hydraulic discs with real bite
Flat-mount hydraulic calipers with extra pad clearance, which road.cc says really helps. BikeRadar calls the braking class-leading.
Semi-wireless, tidy cockpit
The semi-wireless system drops the wires between the shifters and derailleurs, so builds are cleaner, and Bluetooth lets you tune it from your phone.
Add a power meter crank
The FC-R8100-P measures power from both sides, with Bluetooth and ANT+ and a rechargeable battery. Shimano quotes 300+ hours of ride time per charge.
In the box
What’s Included
Di2 wires, junctions, bottom bracket and rotors depend on your frame and which kit you pick. Call us on 01209 215787 if you’re not sure what you need.
Find your fit
Crank Length
| Your height | A common starting point |
|---|---|
| Under 5'3" (160cm) | 165mm |
| 5'3" to 5'8" (160-173cm) | 170mm |
| 5'8" to 6'0" (173-183cm) | 172.5mm |
| Over 6'0" (183cm) | 175mm |
This is general guidance only. A bike fit, or what you’re used to riding now, may point you somewhere different. 50/34T chainrings suit hilly roads and 52/36T suit fast, flat riding. Ask us if you’re between sizes.
Independent reviews
What the Press Say
Says the R8170 Di2 fulfils the potential of electronic shifting and adds class-leading braking. Its pros list superb shift quality, braking power and feel, and Bluetooth connectivity.
Read the reviewroad.ccShimano Ultegra R8170 Di2 Disc GroupsetScored it 10 out of 10: fast shifting and brilliant brakes, now on a level with Dura-Ace but cheaper. Notes app integration and the extra brake pad clearance as highlights.
Read the reviewThese reviews cover the R8170 Di2 disc groupset. The Power Meter kit swaps in the FC-R8100-P crank. They are independent, and we have no say in what they write.
Your options
Ways to Pay for the Ultegra Groupsets
Pay in full
Disc Di2 from £1,034.99 and Power Meter from £1,688.99, online or collect from our Mount Ambrose store. UK delivery only.
Spread the cost
Finance is available through Snap Finance. See the options and apply on our Snap Finance page.
Credit is subject to status. Terms apply.
Cycle to Work
Ask us whether this groupset can go through your Cyclescheme or Bikes for Work scheme. How Cyclescheme works
Employer not on Cyclescheme? See our Bikes for Work scheme.
Talk to us first
Not Sure What to Pick? Ask a Human.
Tell us your bike, your height and how you ride, and we’ll tell you which kit, crank length and cassette to order.
Good to know
Straight Answers
What’s the difference between the two kits?
Both are 12-speed Di2 disc groupsets. The Power Meter kit swaps the standard FC-R8100 chainset for the FC-R8100-P, which measures power at both cranks.
Is it wired or wireless?
The R8170 is semi-wireless. BikeRadar notes it does away with the wiring from the shifters to the derailleurs. The rest of the system uses Di2 wires and an internal battery.
Will it fit my bike and wheels?
You need a disc brake frame with flat-mount mounts, Di2 routing for the battery and wires, and a Shimano 12-speed cassette body. road.cc says the new cassette is backwards-compatible with 11-speed Shimano freehubs. Send us your frame details and we’ll check.
Are rotors included?
No. Neither kit includes rotors. If you’d like rotors quoted with your groupset, call us on 01209 215787 or email servicecourse@saintpiran.co.uk.
How long until it ships?
Some parts are held in supplier warehouses, so shipping times vary with stock. If you need it within 7 days of ordering, email servicecourse@saintpiran.co.uk or call 01209 215787 and we’ll check an estimated arrival before you buy.
How much is delivery, and can I spread the cost?
We deliver in the UK only. You can also collect from our Mount Ambrose store in Redruth. See our shipping policy, Snap Finance and Cycle Scheme pages for details.
Visit Our Mount Ambrose Store in Redruth
Have a chat, ask the questions, decide for yourself.