BH SL1 4.5 vs Sunn Asphalt S1

SL1 4.5

Sunn

Asphalt S1

High endEnduranceCarbon700c2026

Close on the specs and the list price: here are their 12 differences, line by line.

BHBH SL1 4.5

SunnSunn Asphalt S1

At a glance

Differences only

BH SL1 4.5 has the higher-range groupset: Shimano Ultegra Di2, against Shimano 105 Di2.

Key specs4 differences

List price £3,636 –

Model year 2026 2026

Frame Carbon

As printed

Toray T400 Carbon with HCIM (Hollow Core Internal Molding)

Carbon

As printed

Carbone monobloc

Wheelset 700c · Vision Team TC30 i23

As printed

Wheelset: Vision Team TC30 i23

700c · Brute One Carbon R32

As printed

Brute One Carbon R32, disc-compatible, tubeless

Drivetrain 2×12 2×12

Groupset Shimano Ultegra Di2 Higher range

As printed

Shimano Ultegra DI2 shift levers

Shimano 105 Di2

As printed

Shimano 105 Di2 RD-R7150 (12-speed) / ST-7170 (2x12)

Brake model Shimano Ultegra hydraulic

As printed

Front/rear brake: Shimano Ultegra hydraulic

Hydraulic Disc ^{°Value not published by the brand}

Seatpost BH Lite 27,2 ASPHALT CARBONE

Weight– 8.1 kg

Prices

Each model's retailers, delivered to your country, and their prices over time.

BH SL1 4.5

Sunn Asphalt S1

Affiliate links: no extra cost for you ♥

Character

The bike at a glance: the ground it is made for, how it handles, its gears and its equipment, beside the other bikes of its kind.

SL1 4.5 · Road bike made for very smooth ground, very nimble, rather high equipment.
Asphalt S1 · Road bike made for very smooth ground, very nimble, average gearing, rather high equipment.

Terrain

EasyDemanding

Handling

NimbleStable

Gearing

Speed in the lowest and the highest gear at 90 rpm: lower on the left climbs easier, higher on the right goes faster.

Sunn Asphalt S112 km/h - 53 km/h

Easiest gear (climbing)Hardest gear (descending)

BH SL1 4.5Sunn Asphalt S1other endurance road bikes

Components and specs

Every spec line by line; the higher range of a component is marked. The technical groups are folded.

Ride type

Ride type Endurance

As printed

Designed for those who seek long distances

Endurance

As printed

Endurance: Notre vélo d'endurance conçu pour enchaîner les kilomètres

Frame and fork

Fork Carbon

As printed

SL1 Disc Full Integrated Tapered, Full Carbon 1.5"

Carbon

As printed

Carbone, durite de frein intégrée

Max tyre clearance 32 mm –

Axles Thru-axles

As printed

12 mm Thru Axle, hidden and tool-free

Thru-axles

Bottom bracket BB386EVO

As printed

BB386EVO system

–

Cable routing– Fully integrated

Seatpost diameter 27.2 mm –

Drivetrain3 differences

Groupset brand Shimano

As printed

Shimano Ultegra DI2 shift levers

Shimano

As printed

Shimano 105 Di2 RD-R7150 (12-speed)

Shifting Electronic, wired

As printed

Shimano Ultegra DI2 shift levers

Electronic, wired

As printed

Shimano 105 Di2 ST-7170 (2x12)

Chainrings 2 ^{°Value not published by the brand} 2

Gears at the back 12 12

Chainring teeth Shimano Ultegra 52/36 Higher range

As printed

Crank set: Shimano Ultegra 52/36

Shimano 105 FC-R7100 50-34

Cassette Shimano 105 11/34

As printed

Cassette: Shimano 105 11/34

Shimano 105 CS-R7101 11-34

As printed

Shimano 105 CS-R7101, 12-speed, 11-34T

Rear derailleur Shimano Ultegra DI2 12sp ^{°Value not published by the brand}Higher range SHIMANO 105 DI2 RD-R7150 12V ^{°Value not published by the brand}

Shifters Shimano Ultegra DI2 ^{°Value not published by the brand}–

Brakes

Brakes Hydraulic disc

As printed

Shimano Ultegra hydraulic (SL1 Disc frame)

Hydraulic disc ^{°Value not published by the brand}

As printed

Disque hydraulique

Wheels and tyres3 differences

Wheel size 700c / 29"

As printed

Hutchinson Nitro 700x28

700c / 29"

Rims Aluminium ^{°Value not published by the brand} Carbon

As printed

Brute One Carbon R32

Tubeless ready– yes

Tyres Hutchinson Nitro 700x28

As printed

Tyres: Hutchinson Nitro 700x28

Michelin Power Cup 700x30

As printed

Michelin Power Cup, tubeless, 700x30

Tyre width fitted 28 mm 30 mm +2 mm

Cockpit and seatpost3 differences

Handlebar FSA Energy ACR ^{°Value not published by the brand} BRUTE ALUMINIUM 90MM (S/M) ^{°Value not published by the brand}

Stem BH SL ^{°Value not published by the brand} BRUTE ALUMINIUM 90MM (S/M) ^{°Value not published by the brand}

Seatpost model BH Lite 27,2 ^{°Value not published by the brand} ASPHALT CARBONE ^{°Value not published by the brand}

° Value not published by the brand

Geometry

A size per bike (the nearest to the first one's at first), the differences measured from the reference bike.

Size of SL1 4.5

Differences measured from

SL1 4.5 · M

Stack and reach

SL1 4.5 · M SL1 4.5 · M — Reach (mm) 384 · Stack (mm) 549

Geometry

Size M –

Reach 384 mm –

Stack 549 mm –

Top tube (effective) 557 mm –

Seat tube 463 mm –

Head tube 150 mm –

Head angle 73° –

Seat angle 72.5° –

Chainstays 410 mm –

Wheelbase 982 mm –

Front centre 580 mm –

BB drop 65 mm –

BB height 271 mm –

Fork offset 43 mm –

Trail 58 mm –

Where to buy them

BH SL1 4.5
List price £3,636
Its full spec sheet Compare the whole BH SL1 range
Sunn Asphalt S1
Its full spec sheet

Compare the whole BH SL1 range

Frequently asked questions

What groupset do BH SL1 4.5 and Sunn Asphalt S1 come with?

BH SL1 4.5: Shimano Ultegra Di2. Sunn Asphalt S1: Shimano 105 Di2.

Compare other models

Scott Addict 30 105 Di2 vs Sunn Asphalt S1

BH SL1 4.5 vs Sunn Asphalt S1

At a glance

Prices

Character

Gearing

Components and specs

Geometry

Stack and reach

Where to buy them

Frequently asked questions

Other comparisons