Canyon Aeroad vs Specialized Tarmac SL8 & SL9: Which Race Bike to Buy Used?

The Canyon Aeroad is faster in the wind tunnel, but only just: in German magazine TOUR's test the Aeroad CFR needs 204 watts at 45 km/h, the Tarmac SL8 209 watts and the new SL9 205 watts. The Tarmac is about 0.6 kg lighter. Used, the two are close: on buycycle, a current-generation Aeroad CF SLX typically sells for about €3,800, a Tarmac SL8 Pro for about €4,890 and an S-Works SL8 for about €6,200.

As of 3 November 2026. Used prices: based on more than 27,000 Aeroad and Tarmac listings on buycycle, Europe's largest marketplace for used bikes.

The short answer: Aeroad or Tarmac?

The generations at a glance

The Aeroad has been around since 2011; the current fourth generation launched on 19 July 2024. The third generation launched on 6 October 2020 (model year 2021). In June 2026 Canyon gave the CFR a light update: same frame shape, but with a UDH derailleur hanger and the new Race bar (CP0053). That is not a new generation.

The Tarmac SL8 launched on 6 August 2023, the SL9 on 30 June 2026 (S-Works) and 25 August 2026 (S-Level, Expert, Comp). For the full detail, read our Tarmac SL9 vs SL8 comparison.

Specs compared

Weights and frame data as claimed by the manufacturer; weights marked "TOUR" were measured in the magazine's test. Aeroad geometry differs by a few millimetres between sources; check canyon.com before you buy.

Is the Aeroad faster than the Tarmac?

Yes, but the gap is small: in TOUR's wind tunnel (45 km/h) the Aeroad CFR is 5 watts ahead of the SL8 (204 W vs 209 W) and only 1 watt ahead of the SL9 (205 W). The SL9 has almost closed the gap.

Canyon quotes bigger numbers: in its own GST wind-tunnel tests, it says the Aeroad is 8 watts faster than the SL8 and 2.5 watts faster than the Cervélo S5. The limited CFR LTD reaches 198 W in TOUR's test, but with a single chainring, deeper wheels and a 26 mm front tyre, so it is not a fair comparison with a stock SL8. Canyon also claims up to 25 watts for the CP0053 Race bar; TOUR's test shows about 2 watts.

What matters more than 1 to 5 watts is your position. Canyon says the optional aero drops can save up to 14 watts because they narrow your hand position. That depends on the rider. Choose the bike you can hold a low position on for longer.

Is the Canyon Aeroad good for climbing?

Yes. The Tarmac is about 0.6 kg lighter, which costs the Aeroad roughly 13 seconds on a 10 km climb at 7 %. We compared an Aeroad CFR LTD (7.1 kg, TOUR) with an S-Works SL9 (6.5 kg, TOUR).

That is our own back-of-the-envelope calculation for a 75 kg rider at 300 watts (rolling resistance 0.004, CdA 0.36 m²). If you climb for 20 minutes, you will hardly notice 13 seconds. If weight matters above everything, the Tarmac is the better pick. If you ride alpine passes but spend a lot of time on flatter roads too, the Aeroad works fine.

Geometry and cockpit: who fits which bike?

Stack and reach are almost identical on both bikes; only the head tube differs: 142 mm on the Aeroad (size M) against 157 mm on the Tarmac (size 56). That makes the Aeroad a little lower and more aggressive at the front. If you need a very upright position, look at the Tarmac or the Canyon Endurace instead.

The cockpit concepts differ:

• Aeroad CF SLX: the PACE bar CP0048 adjusts by 50 mm in width and 20 mm in height. Stem length is fixed; an optional replacement stem (70–140 mm) costs €199.95.
• Aeroad CFR (from 2026): the Race bar CP0053 with 14° flare, about 120 g lighter than the PACE bar.
• Tarmac S-Works and Pro: the Roval Rapide is one piece. If the size is wrong, you replace the whole part. Expert and Comp have two-piece cockpits.

So the claim that the Tarmac has a "standardised cockpit" only holds for the cheaper trims.

What do the Aeroad, SL8 and SL9 cost new?

With a top groupset, the Aeroad is much cheaper: an Aeroad CFR starts at €9,000, an S-Works Tarmac SL9 costs €13,999. Canyon sells direct, Specialized through dealers. Prices as of 3 November 2026; Canyon changes them often.

The SL8 launched at €14,000 (S-Works). The CF SLX 7 cost €4,199 or €4,799 at the July 2024 launch, depending on the groupset, and now costs €4,799 across the board.

What does a used Aeroad or Tarmac cost?

Used, a current-generation Aeroad CF SLX typically sells for about €3,800, a Tarmac SL8 Pro for about €4,890 and an S-Works SL8 for about €6,200.

Used prices for the Canyon Aeroad (buycycle, as of 3 November 2026)

Used prices for the Specialized Tarmac (buycycle, as of October 2026)

Typical sold price = median of bikes that actually sold. Value after sale = sold price divided by the new price stated in the listing. Generation and trim come from listing titles and model year; the Aeroad model-year buckets are approximate. Figures mix frame sizes, conditions and upgraded parts, so treat them as a guide, not a guarantee. Canyon's new prices are lower and often discounted, so "value after sale" comes out higher for the Aeroad.

Three things stand out:

1. The new generation costs barely more used. A CF SLX from 2025 onwards sells for about €3,800, a 2021–24 CF SLX for about €3,700. The premium for the fourth generation is small.
2. The Aeroad CF SLX sells fast. About 6 days at the median, against 10 to 12 for the SL8. The expensive CFR models take a little longer at 14 days.
3. SL8 supply is growing. Since October 2025, 2,857 SL8s have been listed on buycycle, more than in the two years before combined. For buyers that means plenty of choice.

Used SL9s are still rare; the first S-Works SL9s are listed at around €10,000. There are too few sales for a reliable sold price.

Same budget: which bike?

In every class you get the better spec used: for the price of a new SL9 Expert you can buy a used S-Works SL8 or a used Aeroad CFR with a top groupset.

Which model year is which generation?

On the Aeroad, the handlebar is the clearest clue: the PACE bar (CP0048) means fourth generation, the CP0018 means third. There are other cues too.

Model-year labels in listings are not always reliable. If in doubt, check the handlebar (see above) or ask Canyon with the frame number.

What to check when buying a used Aeroad or Tarmac

1. Aeroad 3rd gen: was the cockpit retrofitted? After Mathieu van der Poel's handlebar broke at Le Samyn on 2 March 2021, Canyon issued a stop-ride on 3 March for all Aeroad CF SLX and CFR bikes with the CP0018 (and CP0015) cockpit. The Aeroad CF SL was not affected. Canyon announced reinforced side parts with a thicker carbon wall, due from July 2021. Ask the seller whether Canyon reworked the bike and ask to see proof. It is a safety check, not a reason to panic: the case is more than five years old.
2. Seatpost and seat tube. On the third generation (seatpost SP0046), Canyon confirmed abrasion on the post and in the seat tube in 2021 and announced a fix. Look at the contact area: scoring or a seized post is a warning sign.
3. Cockpit spares. Both bikes use proprietary bar-and-stem units. If width and length don't fit, it gets expensive; look for parts from Canyon or used in the right size, for example a Roval Rapide cockpit.
4. Warranty for the second owner. Specialized's lifetime frame warranty covers only the registered first owner; through "Assisted Replacement" later owners with proof of purchase can get a replacement frame at a reduced price. According to Canyon's country pages, its guarantee is also tied to the first owner. Ask for the invoice and proof of purchase.
5. Crash damage. With one-piece cockpits, damage is hard to spot. Ask about crashes and inspect the bar, fork crown and head tube.
6. Original or modified? Are the wheels and the power meter still on the bike? If not, the price should be lower.

Verdict: which bike for whom?

More on the Canyon range: Canyon Ultimate vs Aeroad, Canyon road bike comparison, Best Canyon bike models and our brand comparison Canyon vs Specialized. On Specialized: Tarmac SL8 review and Aethos vs Tarmac.

FAQ

Is the Canyon Aeroad good?

Yes. The Aeroad is a pure aero road bike, the fastest of the bikes compared here in TOUR's wind tunnel (204 watts at 45 km/h), and with 32 mm tyre clearance it also works for longer rides.

Is the Canyon Aeroad good for climbing?

Yes. The Tarmac is about 0.6 kg lighter, which costs the Aeroad roughly 13 seconds on a 10 km climb at 7 % (our own calculation).

Which Canyon race bike is better, the Aeroad or the Ultimate?

The Aeroad is faster at speed, the Ultimate lighter and more comfortable. More in our comparison Canyon Ultimate vs Aeroad.

Is the SL9 worth it over the SL8?

For most riders, no. It is 4 watts faster but hardly lighter. Details in our Tarmac SL9 vs SL8 comparison.

How much is a used Aeroad worth?

A CF SLX typically sells on buycycle for €3,700–3,800, a 4th-gen CFR for about €6,900 (as of 3 November 2026).

What is the difference between an Aeroad CF SLX and a CFR?

The CF SLX is the trim with the slightly heavier frame (1,050 g); the CFR is the top version (960 g) with better components.

Sources: Canyon (model and price pages, press releases of 19 March 2021 and 19 July 2024); TOUR, "Bestes Rennrad der Welt? Neues Canyon Aeroad im TOUR-Test" (19 July 2024) and "Canyon knackt die 200-Watt-Schallmauer" (31 July 2026); BikeRadar (19 July 2024, 25 June 2026, SL9 reports of 30 June and 25 August 2026); Cyclingnews (19 July 2024); road.cc (24 June 2021); TOUR on the Tarmac SL9 (28 August 2026); geometry data: bikeinsights.com. Used prices: based on more than 27,000 Aeroad and Tarmac listings on buycycle, as of 3 November 2026 (Tarmac prices as of October 2026).