Cannondale Topstone Carbon 2 AXS SmartSense Review

Everyone in the gravel bike world is trying to solve the same problem: how do we make a bike that is light, fast and comfortable? Gravel bikes are expected to do a lot: people ride them like cyclocross bikes, gear them up for bikepacking, commute on them, and more. Cannondale has been in the game for more than a decade, and the Topstone family has been around since 2018. I am riding the absolutely drool-worthy Topstone Carbon 2AXS SmartSense which is loaded with features and I can’t wait to tell you about it.

2026 Cannondale Topstone Carbon 2 AXS Features:

• Frame & Suspension: Full-carbon frame featuring KingPin rear suspension, Proportional Response size-specific construction, and OutFront steering geometry (55mm fork offset).
• SmartSense Gen 2 Ecosystem: Integrated electronic system powered by a 43.2Wh battery, featuring a front headlight (800 lumens), Garmin Varia eRTL 615 rear-facing radar/taillight, and seamless integration with SRAM AXS shifting.
• Drivetrain: SRAM Apex AXS 12-speed shifters paired with a GX Eagle AXS T-Type rear derailleur, 40T single chainring, and a massive 10-52T cassette.
• Wheels & Clearance: WTB KOM Team tubeless-ready rims on Shimano hubs wrapped in WTB Vulpine 700x45c tires, with massive frame clearance for up to 52mm tires (56mm on the fork).
• Storage & Versatility: Downtube StashPort storage with an included StashBag, multiple frame/fork mounting points for gear and fenders, and UDH / 27.2mm dropper-post compatibility.
• Cockpit & Build: BSA 68mm threaded bottom bracket, Cannondale 2 carbon seatpost, Cannondale 2 ShortDrop alloy handlebar (12-degree flare), Conceal Stem internal routing, and flat-mount hydraulic disc brakes (160mm rotors).
• MSRP: $4,699

Gravel bike, evolved:

There’s so much to say about this feature-packedmila bike. The Topstone family is large and includes both carbon and aluminum members, and what separates most of Cannondale’s lineup are the features and components at each price point. I think the most helpful thing is going to be focusing on what makes this Topstone Carbon 2 AXS SmartSense special without getting too bogged down in specs and numbers. I’ll also speak from my own experience riding this bike all across Washington and Northern Idaho.

For me, my favorite use of the Topstone is on Washington’s incredible cross country singletrack network. Our largest state park is just 8 minutes from my house and has dozens of miles of rolling singletrack. Getting there means a bit of little pavement, with just a little riding in traffic. It’s then followed by some gravel and, finally, miles of singletrack. Most of the time, I’m squeezing rides in around work and other obligations: it’s a rare day that I get to drive my bike somewhere epic and start off on epic gravel. There’s always a ‘getting there’ component.

I think that’s probably how most of us ride, unless we’re retired or professionals. I think that’s also one of the strongest use cases for this particular Topstone: it’s a great mix of performance tech alongside an extremely convenient package of SmartSense features.

So let’s dig into that for a moment: what does SmartSense mean for this Topstone? There are two big categories for this: powering the AXS system and delivering reliable lighting. While most electronic shifting builds rely on the manufacturer-supplied small batteries, Cannondale integrates the AXS shifters with their SmartSense battery. This large-capacity (43.2Wh) powerpack is integrated into the downtube’s StashPort and has 20x the capacity of a conventional AXS battery, so even at just 5% charge you basically have a fully charged AXS system.

I’m big on safety, and I absolutely love the integrated headlight, taillight and radar. I often have a hard time keeping track of all of my lights and chargers, and half the time I start a ride and discover my little cube front light is dead. (It happens all the time!) I blame it on being busy, but the SmartSense system completely removes that from the equation. It means I just have one battery to keep track of, and it’s easy to charge.

The SmartSense system itself is controlled through Cannondale’s app, which makes it easy to choose between light modes, see mileage on the bike and quantify the current charge. Generally I’ve had no issues getting the app and the bike to sync up together; I initially received a faulty battery that was causing intermittent power shorts which Cannondale replaced without drama and now I’m having no issues.

When this system is at its best, it really makes for a seamless experience that adds to the joy of the bike. I particularly like how the AXS battery is routed to be powered by the SmartSense battery; this gives a massive reliable power supply. I think the downside that every consumer needs to weigh is whether they want to introduce the extra complexity into the system. I did have a few rides where my shifting wasn’t working reliably due to the battery issue, which Cannondale easily figured out and fixed. But I’ve never had that happen on my old mechanical groupsets: it’s the tradeoff of electronic shifting.

Cockpit and components:

Speaking of the shifting, let’s touch on this build and its highlights. At $4,699 this bike is respectably equipped and has some nice touches that give it a luxe feel, including a carbon Cannondale 2 seat post and a nice Fizik Argo saddle. The handlebars are their alloy ShortDrop which has a nice flare and sturdy handling. Their in-house bar tape is so-so; mine shifted after 15-20 hours of riding. The Cannondale C1 Conceal stem does a beautiful job of cable management for a super clean look.

On paper, Cannondale’s choice of gruppo balances performance and value; in practice, it definitely felt like a performance build. The backbone is the GX Eagle T-Type rear derailleur driving an XS-1270 Eagle 10-52 cassette with an Apex chain. The shifters are SRAM Apex AXS, and the crank is a SRAM Apex 1 Wide 40T crank at a 172.5mm length for my 54cm frame.

In practice I was very pleased with the combination. Even though Apex is their entry-level getup, the actuation of the Apex shifter buttons is precise. The GX Eagle AXS is smooth and easily customizable with the SRAM AXS app and truly delivers perfect shifting every time. I really like the hoods on the Apex shifters; they’re prominent and provide a super nice grip.

Another feature of the Apex shifters is the brake levers for the SRAM Apex hydraulic disc brakes, which clamp 160mm front and rear center lock rotors. A subtle part of the experience here is a really nice, hydraulic-feeling recoil on the brake levers. They smoothly slide back into place when you come off of them, which feels super luxe.

Clearance has been increased on the latest Topstone carbon, which fits up to 56 mm tires at the front with a rigid fork, 47 mm with a Lefty, and 52 mm at the frame. The stock tires are 45mm WTB Vulpine TCS Light and I think they’re a fantastic balance of efficiency and cushion; they come with tubes out of the box.

What’s it like to ride?

Like I said up above, my primary riding preferences with a gravel bike are singletrack and, of course, gravel. It’s probably worth mentioning the singletrack because I do think there are some folks out there who feel like you need the increased agility and aggressive geometry of a cyclocross bike for singletrack. That’s not the case with the Topstone. This year’s geometry has a 70.7º head angle, which is on the slack side when compared to comparable frames. The fork offset is 55mm, which Cannondale calls their OutFront concept; the slack head angle should produce a stabler/less twitchy steering, which is balanced by the offset of the fork. OutFront produced a shorter trail of 67mm on my 54cm frame. That short trail is what brings agility to the mix. The wheelbase is 102.6cm which is moderate.

For most riders, the message behind the geometry is that the Topstone is nicely balanced. It’s not twitchy, but it’s precise; it’s stable, but not sluggish. Hardcore cyclocross racers should look elsewhere, but for folks looking for a high performance do-it-all gravel bike, the Topstone has a ton to offer.

At roughly 21lbs 3oz, my 54cm Topstone with SmartSense is not exactly a weight weenie’s gravel bike. The story is more nuanced than just ‘The Topstone is heavy:’ this bike has integrated lights and radar, KingPin suspension hardware and 45mm tires. Some of the beauty of this build is that it eliminates the need to bolt on a rear radar/tail light and front light. The battery pack, which weighed 175g on my test scale, provides massively more charge than a traditional AXS battery and helps ensure that you will never run out of battery on a ride.

The other piece to the story that I really believe in is the adage that ‘smooth is fast.’ The KingPin suspension is pretty amazing in my opinion; the rear triangle flex is significant and absolutely hits mute on rough gravel roads. I really felt like my legs and butt were less beat up on the Topstone, and I was able to keep pushing more power through the pedals since I wasn’t getting tossed around as much.

One challenging thing about KingPin is that you can get some pedal bob from it. I weigh around 205 lbs, which is on the heavier side for cyclists. With that extra girth on climbs, I kept looking back to see if the tires were low; they weren’t. When pushed, the KingPin was moving slightly and caused the feeling of a flat tire. Once I left the pavement behind, I no longer noticed the pedal bob, so it’s not a big deal. It does point to the fact that the Topstone is not a dedicated, all-out racer, but for most riders the added benefit of comfort is going to outweigh minor efficiency and weight penalties. If your goal is the podium, check out the Super-X.

All of the above are details: what I really want to convey is more of the “what is it like to ride” vibes. In a word, the Topstone is balanced. It feels fast without being nervous, capable without feeling cumbersome, and comfortable without turning into a sponge. It is the kind of bike that makes sense for the way most of us actually ride: pavement to gravel to singletrack, with a little bit of everything thrown in along the way. The KingPin suspension gives it a surprisingly smooth ride, while the geometry keeps it responsive enough to have fun when the trail gets twisty. It doesn’t specialize in one particular type of riding, but that’s exactly what makes it so compelling. The Topstone is a bike that encourages you to take the long way home.

More Info: Cannondale.com