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Paul Smith Edition Integrated Aero Barstem

Limited Edition Paul Smith version of the Integrated Aero Barstem for road and gravel, combining leading aerodynamics with refined ergonomics and a feathery weight. Its progressive shape, with drops flared by 30mm, boosts control and slashes the drag of the combined bike and rider, while increasing wrist clearance and comfort.

£745.00

Available to order

Aero

The Integrated Aero Barstem achieves its speed in two ways: 1, it enables the rider to achieve a much more aero position; 2, it slices the air more efficiently. Both the rider and the bike’s handlebar meet undisturbed airflow at the front of the bike, so these are big opportunities to reduce drag.

You can achieve a more aero position on the Integrated Aero Barstem thanks to the narrower hoods. This is now a popular feature across aero road bikes with good reason – it works. With your hands on the horns of the levers and your forearms flat, your frontal area is reduced and you go faster.

The mid-depth profile of the top section was selected to compliment the OSTRO VAM and to balance aero against weight and the need for the tops to be comfortable. Following extensive research and development, a 40mm profile depth was chosen. Variations were assessed in CFD (computational fluid dynamics software) first and then prototypes of the best shapes were tested in a wind tunnel. When we returned to the tunnel with the final version to run it against the best rival products, we were so shocked at the results that we repeated the tests. The outcome was the same – the Integrated Aero Barstem decimates the competition.

Ergonomics

Every aspect of the Integrated Aero Barstem is refined to maximise comfort and confidence. The tops sweep back at 3 degrees for a more natural wrist angle, the chamfered corners add wrist clearance when sprinting, and the mid-depth aero profile fits naturally when climbing on the tops even for smaller hands. The upper radius of the drop is tightened to bring the brake lever approximately 5mm closer to the drop to account for the greater length of the latest Shimano and SRAM shifter bodies. This is the attention to detail that makes the difference.

The drops flare out at 7 degrees and measure 29mm wider than the shifter. This carefully judged angle provides a narrow position on the hoods in typical road sizes and, for gravel use in a wider size, it gives confident control in the wider drops while keeping the shifters at an optimal angle.

 

 

Sizing for gravel and road use

The perfectly judged 7-degree flare, placing the drops 29mm wider than the hoods, is how the Integrated Aero Barstem can pull double-duty as both a road and a gravel bar. For the road, size your bar at the drops and benefit from narrower hoods placing you in a more aero position; for gravel use, size your bar at the hoods and enjoy the added control of wider drops when the terrain demands it.

Compatibility and cable routing

Fully internal cable routing is supported for electronic and disc brake groupsets only.

Computer and accessory mounting

The Aero Integrated Barstem features a GoPro-style computer mount, adding angle adjustment and a more supported second mount for a light or action camera. A computer mount is included.

Weight
398 g (42 cm x 110 mm)
Material
Carbon Fiber
Angle
-6 degrees
Drop
120 mm
Reach
80 mm
Stack
39 mm
Flare (drop section)
7 degrees
Backsweep (top section)
3 degrees
Steerer diameter
1-1/8"
Finish
UD matte and glossy
Internal Cable Routing
Electronic and Disc Brake systems only
External Cable Routing
n/a
Accessories included
Black Inc Computer Mount (V10)

Aero

The Integrated Aero Barstem achieves its speed in two ways: 1, it enables the rider to achieve a much more aero position; 2, it slices the air more efficiently. Both the rider and the bike’s handlebar meet undisturbed airflow at the front of the bike, so these are big opportunities to reduce drag.

You can achieve a more aero position on the Integrated Aero Barstem thanks to the narrower hoods. This is now a popular feature across aero road bikes with good reason – it works. With your hands on the horns of the levers and your forearms flat, your frontal area is reduced and you go faster.

The mid-depth profile of the top section was selected to compliment the OSTRO VAM and to balance aero against weight and the need for the tops to be comfortable. Following extensive research and development, a 40mm profile depth was chosen. Variations were assessed in CFD (computational fluid dynamics software) first and then prototypes of the best shapes were tested in a wind tunnel. When we returned to the tunnel with the final version to run it against the best rival products, we were so shocked at the results that we repeated the tests. The outcome was the same – the Integrated Aero Barstem decimates the competition.

Ergonomics

Every aspect of the Integrated Aero Barstem is refined to maximise comfort and confidence. The tops sweep back at 3 degrees for a more natural wrist angle, the chamfered corners add wrist clearance when sprinting, and the mid-depth aero profile fits naturally when climbing on the tops even for smaller hands. The upper radius of the drop is tightened to bring the brake lever approximately 5mm closer to the drop to account for the greater length of the latest Shimano and SRAM shifter bodies. This is the attention to detail that makes the difference.

The drops flare out at 7 degrees and measure 29mm wider than the shifter. This carefully judged angle provides a narrow position on the hoods in typical road sizes and, for gravel use in a wider size, it gives confident control in the wider drops while keeping the shifters at an optimal angle.

 

 

Sizing for gravel and road use

The perfectly judged 7-degree flare, placing the drops 29mm wider than the hoods, is how the Integrated Aero Barstem can pull double-duty as both a road and a gravel bar. For the road, size your bar at the drops and benefit from narrower hoods placing you in a more aero position; for gravel use, size your bar at the hoods and enjoy the added control of wider drops when the terrain demands it.

Compatibility and cable routing

Fully internal cable routing is supported for electronic and disc brake groupsets only.

Computer and accessory mounting

The Aero Integrated Barstem features a GoPro-style computer mount, adding angle adjustment and a more supported second mount for a light or action camera. A computer mount is included.

Weight
398 g (42 cm x 110 mm)
Material
Carbon Fiber
Angle
-6 degrees
Drop
120 mm
Reach
80 mm
Stack
39 mm
Flare (drop section)
7 degrees
Backsweep (top section)
3 degrees
Steerer diameter
1-1/8"
Finish
UD matte and glossy
Internal Cable Routing
Electronic and Disc Brake systems only
External Cable Routing
n/a
Accessories included
Black Inc Computer Mount (V10)

AW1 Hood-to-hood (mm)
360

BW2 Drop-to-drop (mm)
389

CR1 Reach (mm)
92

DR2 Reach (mm)
80

ED1 Drop (mm)
120

FF1 Drop flare

GB1 Backsweep

HA1 Angle
-6°

IS1 Stack (mm)
39

JL1 Length (mm)
80 / 90 / 100 / 110 / 120 / 130 / 140

AW1 Hood-to-hood (mm)
380

BW2 Drop-to-drop (mm)
409

CR1 Reach (mm)
92

DR2 Reach (mm)
80

ED1 Drop (mm)
120

FF1 Drop flare

GB1 Backsweep

HA1 Angle
-6°

IS1 Stack (mm)
39

JL1 Length (mm)

AW1 Hood-to-hood (mm)
400

BW2 Drop-to-drop (mm)
429

CR1 Reach (mm)
92

DR2 Reach (mm)
80

ED1 Drop (mm)
120

FF1 Drop flare

GB1 Backsweep

HA1 Angle
-6°

IS1 Stack (mm)
39

JL1 Length (mm)

AW1 Hood-to-hood (mm)
420

BW2 Drop-to-drop (mm)
449

CR1 Reach (mm)
92

DR2 Reach (mm)
80

ED1 Drop (mm)
120

FF1 Drop flare

GB1 Backsweep

HA1 Angle
-6°

IS1 Stack (mm)
39

JL1 Length (mm)

Specification and Geometry

36
38
40
42
AW1 Hood-to-hood (mm)
360
380
400
420
BW2 Drop-to-drop (mm)
389
409
429
449
CR1 Reach (mm)
92
92
92
92
DR2 Reach (mm)
80
80
80
80
ED1 Drop (mm)
120
120
120
120
FF1 Drop flare
GB1 Backsweep
HA1 Angle
-6°
-6°
-6°
-6°
IS1 Stack (mm)
39
39
39
39
JL1 Length (mm)
80 / 90 / 100 / 110 / 120 / 130 / 140