Tarmac SL9
Specialized's flagship road race bike — a 687g FACT 12r carbon frame, sold at launch in S-Works builds only, optimized for lowest real-world time-to-finish. · 2026 release
- Wheels
- Roval Rapide CLX III
- Frame Weight
- 687g (size 56cm)
- Frame Material
- FACT 12r carbon
- Tire Clearance
- 32mm
+2 more specs ▸hide ▾
- Groupset Options
- SRAM Red AXS or Shimano Dura-Ace Di2
- Complete Bike Weight
- From 6.5kg
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The Tarmac SL9 is one of the best all-around race bikes available, but reviewers across the board agree it is an incremental update that most riders cannot feel, not the generational leap Specialized's "fastest road bike ever made" marketing implies.
- Aero gain over SL8: A claimed 3.8–4W at 45km/h — delivered via a new Flow Fork, Win Fin seat tube extension, and narrowed Speed Sniffer head tube — which BikeRadar's Simon von Bromley described as essentially intangible on the road.
- Weight and ride quality: Complete bike comes in at 6.5–6.66kg depending on build; reviewers at Gran Fondo and Velo both praised its climbing ability, lateral stiffness, and surprising compliance on long rides.
- Handling: Fast and reactive, but Velo noted the shallower tube shaping makes it susceptible to crosswind buffeting — a trade-off absent from more aero-aggressive competitors like the Cervélo S5, Colnago Y1Rs, and Factor One.
- Value tension: At £11,999 / $13,500–$14,000 / €13,999, road.cc's Liam Cahill concluded that heavily discounted SL8 models are the more sensible buy for most riders, given back-to-back testing showed near-identical on-road feel.
- Most-cited issue: The unchanged 32mm maximum tyre clearance was flagged by both BikeRadar and Gran Fondo as already feeling dated at this price point.
Skip if: you already own an SL8 — every reviewer who tested both bikes side-by-side said the performance difference is barely detectable and the upgrade cannot be justified at full price.
- value · price
How much does the Specialized S-Works Tarmac SL9 cost, and what builds are available?
The S-Works Tarmac SL9 starts at $13,500 (Shimano Dura-Ace Di2) or $14,000 (SRAM Red AXS) in the US — £11,999 / €13,999 for both in the UK/EU. At launch, only these two S-Works complete builds are offered, plus a frameset at $6,000 / €5,999 / £5,499. No lower-tier groupset builds have been announced yet.
- vs. competitors
How much faster is the SL9 than the SL8, and is the difference actually noticeable to ride?
Specialized claims 4 watts of aero improvement at 45kph (about 28 seconds over a 100km stage), but reviewers unanimously agree the difference is undetectable on the bike. BikeRadar said 'blindfolded, there's no way I'd have been able to tell the difference,' and road.cc confirmed the two bikes feel 'remarkably similar' in back-to-back riding. 6
- value · price
Should I buy the SL9 or save money on a discounted SL8?
If you already own an SL8, don't bother upgrading. If you're buying new, road.cc and Gran Fondo both conclude that heavily discounted SL8s represent better value — the on-bike performance difference is negligible, and the SL8 was named race bike of the year as recently as 2024–2025. 6
- vs. competitors
How does the SL9 compare to the Cervélo S5, Colnago Y1RS, and Factor One?
Specialized's own data shows the SL9 finishes a simulated 100km Grand Tour stage fastest overall, but the Cervélo S5 is actually more aerodynamic in raw CdA terms (0.2215 vs 0.2227). Specialized argues the SL9's weight advantage offsets that on climbs. On Alpe d'Huez the SL9 is claimed to be 16 seconds faster than the S5 — but on flat routes, Gran Fondo notes dedicated aero bikes like the S5 still have an edge.
- components
What does the SL9 actually weigh, and how light can it get?
The FACT 12r frame is claimed at 687g (size 56, raw carbon finish) — just 2g heavier than the SL8. Real-world complete bike weights measured by reviewers range from 6.66kg (size 54, Gran Fondo) to 6.75kg (size 54, road.cc) to 6.8kg (size 54, Velo). Specialized claims builds as light as 6.5kg, but that requires the lightest component combination including Alpinist wheels. 6
- components
What are the key engineering changes on the SL9 over the SL8?
Every tube has been reshaped, with four headline changes: (1) a deeper 'Flow Fork' hiding the head tube; (2) a 'Speed Sniffer' head tube narrowed by 4mm (10% less frontal area); (3) a 'Win Fin' seat tube that curves around the rear tyre, worth ~0.5 watts; and (4) a narrower two-tiered S-Works Rapide seatpost optimized for airflow between the rider's legs. Shorter cranks and narrower bars also come as stock spec.
- known issues
Is 32mm the maximum tyre clearance, and will that feel limiting?
Yes, tyre clearance is unchanged at 32mm front and rear — the same as the SL8. Specialized defends this as sufficient even for the toughest Classics, but BikeRadar warns it 'will likely feel dated soon,' putting the SL9 behind rivals offering wider clearance at this price point.
- use case
Is the SL9 a good choice if I mostly ride flat routes or mostly climb?
For climbing, it excels — Specialized's simulation puts it 16+ seconds ahead of the Cervélo S5 on Alpe d'Huez, and real-world reviewers praise its light weight and reactive handling on ascents. For flat routes, Specialized's own data concedes dedicated aero bikes like the Cervélo S5 have a higher-speed aerodynamic edge, so pure flat crit or TT riders may be better served elsewhere.
What reviewers actually said
Claimed to be 'the fastest road bike ever made', it's said to be a grand total of 4 watts more aerodynamic than its predecessor – the S-Works Tarmac SL8 – and as light as 6.5kg without pedals in this flagship build spec.
The Specialized S-Works Tarmac SL9 weighs 6.66 kg in size 54, confirmed on the editorial scales.
Specialized says it has optimised the SL9 around what it identifies as the most decisive sections of major races. In other words, it's focusing on where time can realistically be gained rather than just chasing the lowest drag number in a wind tunnel.
Beyond optimizing around one bottle instead of two, a major change was adjusting yaw angles to better reflect actual cycling conditions... Specialized argues that this standardized data measures wind at a height that isn't appropriate for bicycles.
Specialized concedes the Cervélo S5 is more aerodynamic than the SL9 – with a weighted CdA (m²) of 0.2215 compared to 0.2227 – but says this 'small aero advantage' is offset by its increased weight, which Specialized puts at 7.44kg.
Every single tube has been reshaped in some way. The ones that stand out the most, however, are: The seat tube now curves rearward to follow the shape of the tyre. The fork legs are now deeper and thus hide the deep 'speed sniffer' head tube. The seatpost has a narrowed section for extra aero gainz between the rider's legs.
Evenepoel's 54/41-tooth crankset with 165mm cranks is finished in gold details, his 10-36-tooth cassette is all gold apart from the smallest cog, and he also has a waxed gold chain.
We talk about the new 'win fin' and whether consumers should be hyped about incremental micro-updates or if there is simply an expectation that the new model has to exist, much like the newest iPhone.
How it compares
The road bikefield — SKUs we’ve researched or seen mentioned alongside the Specialized Tarmac SL9. Research a competitor to add its full brief.
+ 17 more in this class.
Related
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