Compare
Basso SV vs Trek Madone SLR Gen 8
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
- The Basso SV starts €200 cheaper (€7,799 vs €7,999 for the Trek Madone SLR Gen 8).
- Our verdict scores both 82/100 overall.
- The Trek Madone SLR Gen 8's lightest build is 0.30 kg lighter (6.4 kg vs 6.7 kg).
- Tire clearance: up to 35 mm on the Basso SV vs 32 mm on the Trek Madone SLR Gen 8.
- The Basso SV comes in 7 sizes, the Trek Madone SLR Gen 8 in 6.
Basso SV
Trek Madone SLR Gen 8
| BassoSV | TrekMadone SLR Gen 8 | |
|---|---|---|
| Overview | ||
| Brand | Basso | Trek |
| Build | SV Shimano Dura-Ace Di2 (Fulcrum Wind 57) | Madone SLR 9 AXS Gen 8 |
| Build notes | Configured to order: frame size, colour, crank length, chainrings, Fuga or Levita cockpit size and seatpost setback are chosen in Basso's configurator at no extra cost (Rosso Vivo paint and the silver Fuga cost extra). Basso doesn't list brakes, rotors, tyres or saddle for the builds. | Claimed weight with TLR sealant, no tubes, no bottles or cages. Trek also sells this build in limited 'The First 50 ICON' and 'No. 76 ICON' paint editions (US$15,999.99, €14,399, £12,680). |
| Price (MSRP) | €10,599$13,495€10,599 | €11,999$13,500£10,500 |
| Bike weight | — | 7 kg15.4 lb |
| Weight measured on size | — | ML |
| Model year | 2025 | 2027 |
| Generation | 2025 Sempre Veloce | Gen 8 |
| Launched | 2025-01 | 2024-06 |
| Discipline | Aero road | Aero road |
| UCI legal | Yes | Not stated |
| Verdict (out of 100) | ||
| Overall score | 82 | 82 |
| Aero | 80 | 84 |
| Frame | 86 | 88 |
| Components | 88 | 88 |
| Fit | 90 | 76 |
| Practicality | 64 | 68 |
| Price | 68 | 67 |
| Weight | 100 | 100 |
| Frame & fork | ||
| Frame material | Carbon (Toray T1100 and T1000 fibres) | 900 Series OCLV Carbon |
| Fork material | Carbon | Carbon (Madone Gen 8 one-piece fork, tapered carbon steerer) |
| Frame weight | 780 g27.5 oz | 796 g28.1 oz |
| Fork weight | 370 g13.1 oz | 350 g12.3 oz |
| Weight measured on | Frame size 53, unpainted, without hardware (Basso); fork size not stated | Size ML, painted (frame only and fork only), as stated by Trek |
| Max system weight | — | 125 kg275.6 lb |
| Frame sizes | 45, 48, 51, 53, 56, 58, 61 | XS, S, M, ML, L, XL |
| Colours | Zenith White, Supernova, Élan White, Rosso Vivo (surcharge), Viola Galaxy, Pure Black | — |
| Also available as | — | Madone SL Gen 8 (500 Series OCLV carbon); Project One custom SLR builds; limited 'The First 50 ICON' and 'No. 76 ICON' editions of the SLR 9 AXS |
| UCI frame approval | Approved 17 Apr 2026 as 'SV' (frame and fork), sizes 42-61 (8), code BASSO-014 (UCI list version 2026.10.02) | — |
| Compatibility & standards | ||
| Brake type | — | Hydraulic disc, flat mount |
| Max rotor size | — | 180 mm |
| Wheel size | — | 700c |
| Max tire width | 35 mm | 32 mm |
| Bottom bracket standard | 86.5 mm wide bottom bracket shell (type not stated by Basso; the launch press release says 85.6 mm) | T47 threaded |
| Front axle | — | 12x100 mm chamfered thru-axle (Bontrager Switch) |
| Rear axle | — | 12x142 mm thru-axle (Bontrager Switch, removable lever) |
| Drivetrain compatibility | Basso builds it with electronic groupsets only: Shimano Dura-Ace and Ultegra Di2, SRAM Red and Force AXS, and Campagnolo Record 13 (13-speed), all 2x | Electronic-only routing; 1x and 2x |
| Mechanical shifting possible | — | No |
| 1x compatible | — | Yes |
| Max chainring | — | 56T |
| Front derailleur mount | — | Braze-on; removable aero chainkeeper |
| Cable routing | — | Fully internal through the RCS Headset System |
| Fit & adjustability | ||
| Cockpit | One-piece carbon bar and stem: Basso Fuga (aero, narrow) or Levita (traditional bend with round tops) | One-piece bar and stem (Trek Aero RSL Road) on SLR builds |
| Seatpost type | Basso carbon seatpost, 380 mm long, 15 mm or 0 mm setback, clamped by the hidden 3B Clamp System Gen II | Madone aero carbon seatpost, 0 mm offset, with IsoFlow seat tube; short and tall seat masts |
| Fit notes | 7 frame sizes with a high stack and a seat tube 25 mm shorter than Basso's traditional geometry. 18 one-piece cockpit sizes across the two designs (Basso's tech page says 16): Fuga 370 mm wide with 80-130 mm stems and 65 mm reach, Levita 400-440 mm with 90-130 mm stems and 76.7 mm reach. Six 5 mm split spacers are included. | Trek's Race Fit geometry. Stock bar width and stem length change with frame size (35/38 cm and 80 mm on XS up to 41/44 cm and 110 mm on XL); all sizes have 80 mm reach and 124 mm drop. Trek lists saddle rail height ranges for both the short and the tall seat mast. |
| Aerodynamics | ||
| Manufacturer aero claims | Frontal area 16% lower than the Diamante SV (24,993 mm² vs 29,754 mm²); the down tube is shaped around the front wheel, optimised for 28-35 mm tyres. | Trek says the Gen 8 is about as fast as the Madone Gen 7 when fitted with its RSL Aero bottles (0.1 W faster at 35 km/h in its tunnel table) and 11.3 W faster than the Émonda as sold, with most of the gain over Gen 7 at low yaw. The RSL Aero bottles save 1.8 W at 35 km/h against standard 21 oz bottles. |
| Testing method | Basso quotes frontal area only; it publishes no wind-tunnel drag figures. TOUR notes it didn't wind-tunnel test the bike for its ride test. | Wind tunnel with a pedalling mannequin at 35 km/h (and up to 64 km/h for team simulations), plus CFD and race-scenario simulations; bikes tested in as-sold SLR configuration |
| Tube profile | Truncated airfoil (Kamm tail) on every tube | Full System Foil (replaces Kammtail Virtual Foil) |
| Travel, maintenance & warranty | ||
| Headset bearings | Microtech Solid Oil headset bearings with Basso's 34 g Ultra Torque expander | RCS Headset System |
| Derailleur hanger | — | UDH (SRAM Universal Derailleur Hanger) |
| Proprietary parts | Fuga/Levita one-piece cockpit, seatpost and 3B clamp, thru axles (front 30 g, rear 38 g), headset expander | One-piece Aero RSL bar and stem, RCS headset system, Madone aero seatpost and seat mast, aero chainkeeper, RSL Aero bottle cages |
| Frame warranty | 5 years on the carbon frame when the bike is registered (frames from 16 Jan 2025) | — |
| Sold via | Built to order through Basso dealers or ordered on bassobikes.com | Trek retailers and trekbikes.com; custom builds through Project One |
| Drivetrain | ||
| Groupset | Shimano Dura-Ace Di2 | SRAM Red AXS E1 |
| Launched | — | 2024 · current generation |
| Speeds | — | 12-speed |
| Electronic | Yes | Yes |
| Wireless | — | Yes |
| Drivetrain | 2x | 2x |
| Shifters | Shimano Dura-Ace Di2 | SRAM Red AXS E1 |
| Notes | Combined shift and hydraulic brake levers | — |
| Crankset | Shimano Dura-Ace | SRAM Red AXS E1 Power Meter |
| Chainrings | 50/34 or 52/36 | 48/35 |
| Crank lengths available | 170, 172.5 or 175 mm (chosen in the configurator; Basso adds 'if compatible') | 160 mm (XS-S), 165 mm (XS-ML), 170 mm (M-XL), 172.5 mm (L-XL), as listed by Trek |
| Spindle | — | DUB |
| Power meter | — | SRAM Red AXS E1 Power Meter |
| Launched | — | 2024 · current generation |
| Type | — | Integrated in crankset |
| Bottom bracket | — | SRAM DUB T47 |
| Standard | — | T47 threaded, internal bearing |
| Front derailleur | — | SRAM Red AXS E1 |
| Notes | — | Braze-on |
| Rear derailleur | — | SRAM Red AXS E1 |
| Max cog | — | 36T |
| Cassette | Shimano Dura-Ace | SRAM Red XG-1290 E1 |
| Range | 11-34 | 10-33 |
| Speeds | — | 12-speed |
| Chain | — | SRAM Red E1 |
| Brakes | ||
| Brake calipers | — | SRAM Red AXS E1 |
| Type | — | Hydraulic disc, flat mount |
| Rotors | — | SRAM Paceline X |
| Front rotor | — | 160 mm |
| Rear rotor | — | 160 mm |
| Mount | — | Center Lock |
| Wheels & tires | ||
| Wheelset | Fulcrum Wind 57 | Bontrager Aeolus RSL 51 |
| Front rim depth | — | 51 mm |
| Rear rim depth | — | 51 mm |
| Material | Carbon | OCLV Carbon |
| Tubeless ready | — | Yes |
| Freehub options | — | SRAM XD-R or Shimano 11/12-speed (Trek lists both) |
| Tires | — | Bontrager Aeolus RSL RD |
| Tire width | — | 28 mm |
| Casing | — | Cotton, 170 tpi |
| Notes | — | Trek also lists Pirelli P Zero Race TLR RS or P Zero Race 28 mm, with Pirelli P Zero SmarTube TPU tubes and Bontrager TLR sealant |
| Cockpit | ||
| Handlebar | Basso Fuga | Trek Aero RSL Road |
| Type | One-piece carbon bar and stem | One-piece bar and stem |
| Integrated stem | Yes | Yes |
| Bar width | 370 mm | — |
| Widths available | Fuga: 370 mm with 80-130 mm stems (6 sizes). Levita (round-top, traditional shape) can be chosen instead at no extra cost: 400, 420 or 440 mm with 90-130 mm stems (12 sizes) | 35/38 cm (XS), 37/40 cm (S), 39/42 cm (M-L), 41/44 cm (XL), control/drop width |
| Bar reach | 65 mm | 80 mm |
| Bar drop | 115 mm | 124 mm |
| Material | — | OCLV Carbon |
| Weight | 300 g10.6 oz | — |
| Notes | Stem length chosen in the configurator (100 mm by default). Weight for 100 x 370 mm. Basso's Fuga drawing also lists a 400 mm dimension and a 6° angle; Levita has 76.7 mm reach, 120 mm drop and weighs 330 g. A silver Fuga is offered at extra cost with the Rosso Vivo paint. | Race Fit; 80 mm (XS), 90 mm (S-M), 100 mm (ML-L) or 110 mm (XL) stem length |
| Saddle & seatpost | ||
| Saddle | — | Aeolus RSL |
| Saddle width | — | 145 mm |
| Rails | — | Carbon |
| Notes | — | Trek also lists a 155 mm width (XS-S) and the Aeolus RSL AirLoom version |
| Seatpost | Basso Piuma | Trek Madone aero carbon seatpost |
| Offset / setback | 15 mm setback or 0 mm (chosen in the configurator) | 0 mm |
| Material | Carbon | Carbon |
| Weight | 180 g6.3 oz | — |
| Notes | 380 mm long; 3B Clamp System Gen II in the frame. Basso's tech page calls it the Diamante seatpost; weight for the 380 mm post | Short length |
| Bar tape | — | Trek EcoTack |
| Notes | — | Trek also lists gel cork tape |
| Included extras | ||
| Bottle cages | — | Trek RSL Aero Bottles and Cages |
| Geometry (smallest – largest size) | ||
| Sizes | 45, 48, 51, 53, 56, 58, 61 | XS, S, M, ML, L, XL |
| Rider height min | — | 143–188 cm4′8″–6′2″ |
| Rider height max | — | 158–199 cm5′2″–6′6″ |
| Stack | 520–634 mm20.5–25″ | 507–610 mm20–24″ |
| Reach | 370–390 mm14.6–15.4″ | 370–402 mm14.6–15.8″ |
| Seat tube angle | 72.5–75.5° | 73.4–73.8° |
| Head tube angle | 71.2–74° | 71.6–73.9° |
| Head tube length | 115–218 mm4.5–8.6″ | 100–201 mm3.9–7.9″ |
| Effective top tube | 505–590 mm19.9–23.2″ | 517–584 mm20.4–23″ |
| Seat tube length | 420–580 mm16.5–22.8″ | 404–609 mm15.9–24″ |
| Chainstay | 406–412 mm16–16.2″ | 410–412 mm16.1–16.2″ |
| Wheelbase | 971–1,002 mm38.2–39.4″ | 971–1,007 mm38.2–39.6″ |
| BB drop | — | 68–72 mm2.7–2.8″ |
| Fork offset | — | 40–50 mm1.6–2″ |
| Trail | — | 57–62 mm2.2–2.4″ |
| Front centre | 575–602 mm22.6–23.7″ | 572–604 mm22.5–23.8″ |
| Standover | 722–857 mm28.4–33.7″ | 704–863 mm27.7–34″ |
| Wheel size | — | 700c |
| Stem length | — | 80–110 mm3.1–4.3″ |
| Handlebar reach | — | 80 mm3.1″ |
| Handlebar drop | — | 124 mm4.9″ |
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).