Roy says the first group are the types that drive the North American gravel scene and are up at midnight to enter the Unbound lottery, while the second group, still of US persuasion, are late to the idea you can ride bikes off-road but \u2018a gravel bike that looks like a Cerv\u00e9lo S5<\/a> might be just the thing to push them over to the dirt\u2019.\u00a0\u00a0<\/p>\n As for the European enthusiasts, \u2018Speed and stiffness are critical factors for these riders, so a gravel bike that speaks road language fluently will appeal to them,\u2019 says Roy. Bikepackers look to be deliberately left out in this case.\u00a0<\/p>\n Cerv\u00e9lo \u00c1spero-5 design and build<\/p>\n Cerv\u00e9lo highlights the \u00c1spero-5\u2019s aerodynamics<\/a>, claiming it\u2019s 37 watts more aerodynamically efficient than its predecessor and 34 watts more efficient than its nearest competitor at 45kmh. However its testing, which is as yet unpublished, did not set the \u00c1spero-5 against aero-optimised rivals such as the 3T RaceMax<\/a> or Factor Ostro Gravel<\/a>.\u00a0<\/p>\n The semi-integrated, two-piece cockpit delivers six of these watts savings, according to Cerv\u00e9lo. A proprietary C-shaped steerer makes room for the brake cables to pass internally through the stem into the frame, keeping them out of the wind but keeping the head tube narrow. Adjustability is not forsaken for aerodynamics though. The split spacers mean changing bar height is straightforward and you can alter bars and stems individually.\u00a0<\/p>\n Despite adding depth to the head tube and down tube, and oversizing the bottom bracket junction for stiffness, Cerv\u00e9lo claims the \u00c1spero-5 is 66g lighter than before, which Roy says is down to a more refined carbon construction.\u00a0<\/p>\n The internal down tube storage compartment isn\u2019t the roomiest but still holds two pouches for an inner tube, tyre lever and CO2 canister. Similarly, in line with the brand\u2019s \u2018haul ass not cargo\u2019 slogan, the only other bolts are on the top tube to attach the low-profile bento box supplied with the bike.\u00a0\u00a0<\/p>\n This range-topping model weighs a svelte 7.78kg in size 58 and comes with a mullet drivetrain<\/a> that pairs a 12-speed SRAM Eagle 10-52t cassette with a 48t chainring. Asked why Cerv\u00e9lo didn\u2019t use SRAM\u2019s latest 13-speed gravel groupset, with its 10-46t cassette and 46t largest chainring, Roy says, \u2018Pairing a wide-range cassette with a larger chainring ensures the racer has the gears to climb while also providing the top-end speed for the race to the line.\u2019\u00a0<\/p>\n Similarly idiosyncratic is the choice of tyres. The \u00c1spero-5 comes specced with Vittoria Corsa Pro Control tyres in an exclusive 42mm width. While they are gravel bike wide, they are also road bike slick, meaning they proved useless in wet conditions off-road and I had to swap them for knobblier 45mm Vittoria Terreno <\/a>T50s.\u00a0<\/p>\n Cerv\u00e9lo \u00c1spero-5 geometry and riding <\/p>\n The \u00c1spero-5\u2019s stretched and low front end marks it out as a gravel race bike<\/a>. Likewise the rest of its geometry <\/a>is a touch more aggressive than all-round gravel bikes. Short chainstays and wheelbase work to increase reactivity, while the fairly generous 78mm bottom bracket drop coupled with the moderate 65mm trail (on 45mm tyres) both serve to improve stability, providing control while leaving the steering fast enough for high-speed manoeuvres.\u00a0\u00a0<\/p>\n The \u00c1spero-5 also showcases modern bike fit trends. Shorter-than-standard cranks and a zero offset seatpost partially counteract the slackish 72.6\u00b0 seat tube angle in an attempt to introduce biomechanical benefits such as opening the rider\u2019s hip angle.\u00a0<\/p>\n It\u2019s a bike made for high speeds on fine, smooth gravel. Fortunately there is plenty of that on Cannock Chase, not far from my home, and after multiple test rides I came away extremely impressed by the \u00c1spero-5. Overall it outperformed the Cinelli King Zydeco 2<\/a> by seeming similarly fast while being significantly more forgiving on chunkier stones. I felt like I could hit the ideal line through flowing S-bends at speed and feel nicely planted.\u00a0\u00a0<\/p>\n There was no give from the frame while pedalling, but there was also a feeling of compliance, which I suspect comes from the Reserve 40|44 GR wheels. They seem less harsh than many deep gravel rims, especially combined with the wider Vittoria tyres.\u00a0<\/p>\n I couldn\u2019t tell you how many watts Cerv\u00e9lo\u2019s aero cockpit saved me, but to my mind it\u2019s more significant that the stem and handlebar are separate, adjustable and ergonomic. I could comfortably rest my wrists on the handlebar tops in the \u2018aero hoods\u2019 position, and I didn\u2019t get any of the numbness that can come from super-stiff one-piece handlebars.\u00a0\u00a0<\/p>\n Due to its reactive handling, dropping down loose and greasy descents required more concentration than with some gravel bikes, but they were manageable if I took my time, and when fitted with the 45mm Terreno tyres the bike could cope with gnarlier trails as well. Thanks to the apparent aerodynamic efficiency of its frame and geometry, it didn\u2019t seem to give much away to a fast endurance bike<\/a> on the road, so on a mixed terrain gravel ride I suspect you\u2019d make up the time on tarmac you lost on technical stretches.\u00a0\u00a0<\/p>\n Tyre clearance and gearing<\/p>\n While some brands\u2019 stated maximum tyre width is conservative, when Cerv\u00e9lo says 45mm it means it. The tiny smidgen of space between the rubber and frame and fork led me to believe the 45mm tyres had blown out wide on the broad rims, but a Vernier calliper indicated they hadn\u2019t. It\u2019s the kind of gap that could get clogged with mud or stones, so be careful riding on looser surfaces when you\u2019ve maxed out tyre clearance.\u00a0\u00a0<\/p>\n With a biggest gear (48\/10) identical to SRAM\u2019s road bike groupsets<\/a>, you\u2019ll have little fear of spinning out on descents. More importantly, at higher gravel speeds of 30-35kmh, the chainline is fairly straight and efficient. However, thanks to its very low 48\/52 bottom gear, low weight and dextrous handling, the \u00c1spero-5 is also a match for steep tracks.\u00a0<\/p>\n![\"\"](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/03\/Cervelo-Aspero-5-1-970x647.webp.webp\")
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