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BH Aerolight vs Ventum NS1
Pick up to 4 bikes. Rows line up component by component. Highlighted rows differ, and green marks the best value where lower or higher is clearly better.
Key differences
- Our verdict scores the Ventum NS1 higher overall: 83/100 vs 76/100.
- Tire clearance: up to 32 mm on the BH Aerolight vs 35 mm on the Ventum NS1.
- The BH Aerolight comes in 5 sizes, the Ventum NS1 in 6.
BH Aerolight
Ventum NS1
| BHAerolight | VentumNS1 | |
|---|---|---|
| Overview | ||
| Brand | BH | Ventum |
| Build | Aerolight 6.0 | NS1 Dura-Ace Di2 |
| Build notes | Model code LA606. BH showed it discounted to €3,909.90 (Spain) and £3,554.40 (UK) in October 2026. | Colours Onyx, Aerochrome, Limoncello and Bordeaux. Crank length and CR2 cockpit size can be changed at order (cockpit swap $75). |
| Price (MSRP) | €4,600€4,600£4,200 | $11,299$11,299$11,299 |
| Model year | 2026 | 2026 |
| Generation | Aerolight (2022 model year) | Third generation |
| Launched | 2021-10 | 2026-02 |
| Discipline | Aero road | Aero road |
| UCI legal | Yes | Yes |
| Verdict (out of 100) | ||
| Overall score | 76 | 83 |
| Aero | 74 | 78 |
| Frame | 84 | 86 |
| Components | 76 | 80 |
| Fit | 70 | 88 |
| Practicality | 62 | 80 |
| Price | 89 | 86 |
| Frame & fork | ||
| Frame material | Carbon (Aerolight Disc ACR monocoque, made with BH's HCIM hollow-core internal moulding) | Carbon (higher-modulus fibre than the previous NS1) |
| Fork material | Carbon (Aerolight 'Air Bow' fork, integrated tapered 1.5 in steerer) | Carbon, tapered carbon steerer |
| Frame weight | 950 g33.5 oz | 852 g30.1 oz |
| Weight measured on | BH claim; BH's page gives no size (ROADBIKE quotes BH's figure as size MD) | Frame, size M/L |
| Frame sizes | XS, SM, MD, LA, XL | XS, S, M, M/L, L, XL |
| Colours | — | Onyx, Aerochrome, Limoncello, Bordeaux (Bordeaux on the Dura-Ace, Red AXS and frameset only) |
| UCI frame approval | Approved 4 Oct 2021 as 'AEROLIGHT ROAD' (frame and fork), sizes XS - XL (5), code BHB-AERO (UCI list version 2026.10.02) | Approved 10 Oct 2025 as 'NS1' (frame and fork), sizes XS-XL (6), code VENTUM-003 (UCI list version 2026.10.02) |
| Compatibility & standards | ||
| Brake type | Hydraulic disc | Hydraulic disc, flat mount |
| Max rotor size | 160 mm | — |
| Wheel size | 700c | — |
| Max tire width | 32 mm | 35 mm |
| Bottom bracket standard | BB386 (86.5 mm wide shell, 46 mm bore) | T47 threaded |
| Front axle | 12x100 thru-axle (M12x1.0), BH Quick Lever | — |
| Rear axle | 12x142 thru-axle (M12x1.0), BH Quick Lever | — |
| Drivetrain compatibility | Electronic groupsets only: Shimano, SRAM and Campagnolo EPS | Builds use 2x12 electronic Shimano Di2 and SRAM AXS |
| Mechanical shifting possible | No | — |
| Max chainring | 55T | — |
| Cable routing | Fully internal (ACR system) | Internal |
| Fit & adjustability | ||
| Cockpit | Integrated bar and stem with ACR internal routing (BH EVO SL Monocoque ACR; Vision Metron 5D ACR on the 9.0) | One-piece carbon bar and stem (Ventum CR2) on most builds; the Rival AXS build has a separate Zipp stem and bar |
| Standard stem and bar possible | — | Yes |
| Seatpost type | BH Aerolight aero seatpost, clamped inside the seat tube by an integrated rear clamp | Ventum carbon seatpost, 10 mm offset |
| Fit notes | Bar width and stem length are matched to frame size on the stock builds (400-440 mm bars, 90-110 mm stems). Up to 40 mm of headset spacers (2x15 + 1x10 mm) can go under the stem. | 6 sizes with more stack and reach than the previous NS1, especially on larger sizes. The CR2 one-piece cockpit comes in 16 sizes (38-44 cm wide, 90-120 mm stems) and crank lengths of 165-172.5 mm can be chosen at order. |
| Aerodynamics | ||
| Manufacturer aero claims | 15.9% less drag than BH's previous G8, about 5 W at high speed (BH) | Ventum publishes no drag figures. The front end, inspired by the Tempus TT bike, extends the leading edge ahead of the steerer and uses an hourglass head tube to cut frontal area; the fork legs are deeper. |
| Tube profile | Kamm-tail tube shapes; the 'Air Bow' fork and seat stays leave a wide gap to the wheels | — |
| Travel, maintenance & warranty | ||
| Headset bearings | FSA ACR (integrated, tapered to 1.5 in) | — |
| Derailleur hanger | BH frame-specific hanger (part numbers in BH's Aerolight manual) | UDH (SRAM Universal Derailleur Hanger) |
| Proprietary parts | Integrated ACR bar and stem, Aerolight seatpost and integrated clamp, frame-specific derailleur hanger, Quick Lever thru-axles | — |
| Frame warranty | Lifetime frame warranty for the original buyer when registered online within 30 days and bought from an authorised BH dealer; excludes the fork and paint | Lifetime on frame, fork and seatpost for the original owner (register within 30 days); paint and decals 1 year; crash replacement offer for 5 years |
| Sold via | BH retailers, and online at bhbikes.com in some countries | Direct from Ventum (ride-ready shipping in the lower 48 US states) and through dealers |
| Drivetrain | ||
| Groupset | Shimano 105 Di2 R7100 | Shimano Dura-Ace Di2 R9200 |
| Launched | 2022 · current generation | 2021 · current generation |
| Speeds | 12-speed | 12-speed |
| Electronic | Yes | Yes |
| Drivetrain | 2x | 2x |
| Shifters | Shimano 105 Di2 ST-R7170 | Shimano Dura-Ace Di2 |
| Notes | Combined shift and hydraulic brake levers | Combined shift and hydraulic brake levers |
| Crankset | Shimano 105 R7100 | Shimano Dura-Ace |
| Chainrings | 52/36 | 52/36 |
| Crank lengths available | 165 mm (XS-SM), 170 mm (MD), 172.5 mm (LA-XL) | 170 mm (XS-M/L), 172.5 mm (L-XL) |
| Bottom bracket | — | Shimano T47 Outboard |
| Standard | — | T47 threaded |
| Front derailleur | Shimano 105 Di2 R7150 | Shimano Dura-Ace Di2 |
| Rear derailleur | Shimano 105 Di2 R7150 | Shimano Dura-Ace Di2 |
| Cassette | Shimano 105 R7100 | Shimano Dura-Ace R9200 |
| Range | 11-34 | 11-30 |
| Speeds | 12-speed | 12-speed |
| Chain | Shimano 105 | Shimano CN-M9100 |
| Brakes | ||
| Brake calipers | Shimano 105 hydraulic disc | Shimano Dura-Ace |
| Type | Hydraulic disc | Hydraulic disc, flat mount |
| Rotors | — | Shimano Dura-Ace RT-MT900 |
| Front rotor | — | 160 mm |
| Rear rotor | — | 140 mm |
| Mount | — | Center Lock |
| Wheels & tires | ||
| Wheelset | Vision Team35 | Zipp 454 NSW |
| Material | — | Carbon |
| Tubeless ready | — | Yes |
| Freehub options | — | Shimano HG |
| Notes | — | Integrated TyreWiz |
| Tires | Hutchinson Nitro | Schwalbe One |
| Tire width | 28 mm | 30 mm |
| Notes | — | Performance RaceGuard |
| Cockpit | ||
| Handlebar | BH EVO SL Monocoque ACR | Ventum CR2 |
| Type | Integrated bar and stem | One-piece carbon bar and stem |
| Integrated stem | Yes | Yes |
| Widths available | 400 mm (XS), 420 mm (SM-MD), 440 mm (LA-XL) | 380, 400, 420 or 440 mm with 90-120 mm stems (16 sizes) |
| Material | Carbon | Carbon |
| Notes | BH lists the bar and stem as one model, with stem length by size: 90 mm (XS), 100 mm (SM-MD), 110 mm (LA-XL) | Stock size by frame: 400 x 90 (XS-S), 420 x 90 (M-M/L), 420 x 100 (L), 440 x 100 (XL); any other size for $75 at order. Integrated computer mount sold separately. |
| Headset | FSA ACR | — |
| Saddle & seatpost | ||
| Saddle | Prologo Dimension | Fizik Vento Argo R5 |
| Saddle width | — | 140 mm |
| Seatpost | BH Aerolight | Ventum Carbon seatpost |
| Offset / setback | — | 10 mm |
| Material | — | Carbon |
| Notes | Clamped by BH's integrated aero seat clamp | — |
| Bar tape | — | FSA Powertouch |
| Geometry (smallest – largest size) | ||
| Sizes | XS, SM, MD, LA, XL | XS, S, M, M/L, L, XL |
| Stack | 510–576 mm20.1–22.7″ | 493–615 mm19.4–24.2″ |
| Reach | 368–399 mm14.5–15.7″ | 370–413 mm14.6–16.3″ |
| Seat tube angle | 73–74.5° | 73–73.5° |
| Head tube angle | 71.3–73° | 71–73° |
| Head tube length | 110–175 mm4.3–6.9″ | 90–211 mm3.5–8.3″ |
| Effective top tube | 510–575 mm20.1–22.6″ | 516–601 mm20.3–23.7″ |
| Seat tube length | 555–627 mm21.9–24.7″ | 439–543 mm17.3–21.4″ |
| Chainstay | 410 mm16.1″ | 410 mm16.1″ |
| Wheelbase | 973.7–1,005.5 mm38.3–39.6″ | 968–1,031 mm38.1–40.6″ |
| BB drop | 68–72 mm2.7–2.8″ | 69 mm2.7″ |
| Fork length | 370 mm14.6″ | 373 mm14.7″ |
| Fork offset | — | 45 mm1.8″ |
| Trail | — | 58.1–70.9 mm2.3–2.8″ |
| Front centre | 575–605 mm22.6–23.8″ | 568–631 mm22.4–24.8″ |
| Standover | — | 730–840 mm28.7–33.1″ |
| Saddle height min | 680–750 mm26.8–29.5″ | — |
| Saddle height max | 758–830 mm29.8–32.7″ | — |
| Wheel size | 700c | — |
| Crank length | 165–172.5 mm6.5–6.8″ | 170–172.5 mm6.7–6.8″ |
| Stem length | 90–110 mm3.5–4.3″ | 90–100 mm3.5–3.9″ |
| Handlebar width | 400–440 mm15.7–17.3″ | 400–440 mm15.7–17.3″ |
Geometry overlay
Pick a size for each bike to see frames and arm-pad ranges on top of each other.
Drawn to scale (how to read it).