Name: 2025 Boardman SLR 8.9 Disc Di2
Brand: Boardman
Rating: 4.392 (2 reviews)

Front: Shimano 105 Hydraulic Disc Brake - 160mm Rotor, Rear: Shimano 105 Hydraulic Disc Brake - 160mm Rotor

C8 Endurance Carbon Disc with tapered steerer

Formula 100mm x12mm Front / 142mmx12mm Rear

Boardman Alloy, 31.8mm clamp, 70mm reach, 120mm drop

FSA Orbit C-40 ACB, 1 1/8” - 1.5” Tapered, Integrated.

Double Butted Stainless Steel, Radial front, 2X rear

Vittoria Rubino Pro G2.0 folding, 700x28c

Overview
With a new C8 Carbon Endurance layup and 12 speed wireless shifting, the SLR 8.9 Disc Di2 adds two technologies previously reserved for our 9 Series bikes into our renowned for value 8 Series package.
Building on the already low weight and aerodynamically efficient SLR 8.9 Disc frame, we've developed a brand new C8 Endurance carbon layup. It not only shaves over 150g from the frame and fork, but also adds a big increase in vibration damping through the frame and fork, making the SLR 8.9 Disc Di2 a surprisingly comfortable place to rack up miles.
By dissipating more of the fatiguing road buzz being passed into the rider's body, muscle fatigue is reduced, enabling greater power output for longer. And we haven't sacrificed any pedalling stiffness in the frame either - power transfer is maintained. The frame uses the same tube profiles developed in CFD and the Wind Tunnel as our 9 Series bikes to keep aerodynamic drag to the minimum. This means going faster for the same effort, what’s not to like?
Shimano’s 105 Di2 groupset offers pro level shifting across a huge range of gears, without big jumps between them thanks to a closer spaced 11-34 tooth 12 speed cassette. With a 50-34 chainset up front, there's more than enough range for super-steep climbs and fast descents alike. Those descents are where the hydraulic disc brakes come into their own, with much greater braking power and control vs a rim braked bike. Tyres are also vitally important for control, and 28mm Vittoria Rubino Pro tyres with Graphene 2.0 compound offer great grip and puncture resistance while rolling quickly too.
Working with Chris Boardman, data from hundreds of bike fits and insight from bike fit experts, we have made simple changes to the contact points of the SLR range. Using advanced pressure mapping and real-world testing we’ve shown that the Boardman SLR saddle will provide long-ride comfort for the majority of people. Bar width and crank length are also reduced vs previous bikes to make sure they are suited to the fit needs of real cyclists, not just based on old traditions. These changes also reduce the rider’s frontal area, which has been wind tunnel tested to reduce drag, meaning less effort required for the same speed.New C8 Endurance Carbon frame - 1000g frame & 420g fork
Shimano 105 Di2 12 speed Groupset with Hydraulic Disc Brakes Shimano 105 compact 50/34t chainset with 11-34t cassette
28mm Vittoria Rubino Pro Graphene 2.0 tyres
Hidden mudguard mounts make the SLR 8.9 Disc practical all year round

Boardman SLR 8.9 Disc Di2

A carbon frame race bike with upper mid-range components and shimano 105 hydraulic disc brakes.

The new Boardman SLR 9.4 Ltd is one of the best-value bikes we’ve seen in 2025.

BikeRadar

Boardman SLR 9.4 Ltd review: without doubt 2025’s best-value performance endurance bike | BikeRadar

Not the most exciting ride, but great for travelling fast in comfort

Weight	19.6 lbs
Frame	Carbon
Fork	Carbon
Wheels	700c Aluminum
Drivetrain	2 × 12 Electronic
Groupset	105 Di2
Brakes	Shimano 105 Hydraulic Disc

Frame	C8 Endurance Carbon - Aero-Optimised BB Standard: BB86/BB92, Press Fit
Fork	C8 Endurance Carbon Disc with tapered steerer
Bottom Bracket	Shimano Press Fit
Headset	FSA Orbit C-40 ACB, 1 1/8” - 1.5” Tapered, Integrated.
Stem	Boardman Alloy, 31.8mm clamp
Handlebar	Boardman Alloy, 31.8mm clamp, 70mm reach, 120mm drop
Saddle	Boardman SLR
Seatpost	Boardman Alloy, 27.2mm Type: Rigid
Pedals	Toe strap road, 9/16”

Rear Derailleur	Shimano 105 Di2 R7170 12 speed
Front Derailleur	Shimano 105 Di2 braze- on
Crank	Shimano 105 R7100 50-34
Shifters	Shimano 105 Di2 2x12
Cassette	Shimano CS-R7100 12 speed, 11-34
Chain	Shimano CN-M6100
Brakes	Front: Shimano 105 Hydraulic Disc Brake - 160mm Rotor, Rear: Shimano 105 Hydraulic Disc Brake - 160mm Rotor Type: Shimano 105 Hydraulic Disc

Rims	Boardman Tubeless Ready 28h front & rear
Spokes	Double Butted Stainless Steel, Radial front, 2X rear
Front Hub	Formula 100mm x12mm Front / 142mmx12mm Rear
Rear Hub	Formula 100mm x12mm Front / 142mmx12mm Rear
Tires	Vittoria Rubino Pro G2.0 folding, 700x28c

2025 BoardmanSLR 8.9 Disc Di2

2025 Boardman
SLR 8.9 Disc Di2