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Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
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Description
gravel bike yellow Cervelo Aspero Rival XPLR AXS 1 Gravel Bike, Marigold / 54cmIn 2019, spero took the gravel world by storm, heralding a new era of speed in gravel. Fun, but flat out. The new spero remains true to its original brief, but with some improvements: a threaded BB shell, neater cable routing, and a UDH compatible derailleur hanger for those who want to use SRAMs Transmission drivetrains. And its more aero, of course. In the case of spero, aerodynamic performance is less about pure speed as a result of drag reduction,
In 2019, Áspero took the gravel world by storm, heralding a “new era of speed in gravel.” Fun, but flat out. The new Áspero remains true to its original brief, but with some improvements: a threaded BB shell, neater cable routing, and a UDH-compatible derailleur hanger for those who want to use SRAM’s Transmission drivetrains. And it’s more aero, of course. In the case of Áspero, aerodynamic performance is less about pure speed as a result of drag reduction, and more about conservation of energy. After a big day in a headwind, the three watts saved over the previous Aspero might add up to one less energy gel your stomach has to digest—WORTH IT.
In addition to the drag reduction, we also dropped the seat stays to give a bit more compliance out back, and reduced front-end stiffness slightly to make the last hours of a long race less painful. Between those dropped seat stays, we added in a bit more clearance for mud, too, taking what we learned from R5-CX (and the Unbound mudfest in 2023). It’s a lot of seemingly small improvements, but they add up to a lot. The result is a bike that feels a lot like the original Áspero, but is faster, more comfortable, and more versatile.
FEATURES:
- Threaded Bottom Bracket: Aspero uses the asymmetrical T47a threaded bottom bracket we pioneered on R5-CX. It’s a simple, rider-serviceable interface that allows us to deliver the benefits of BBRight in a more user-friendly form.
- Universal Derailleur Hanger: We used SRAM’s Universal Derailleur Hanger (UDH) standard on the new Aspero. It’s ideal if you want to live your best ‘business in the front, party in the back’ life with one of SRAM’s Transmission drivetrains today, and ensures compatibility for future drivetrain developments.
- Internal Cable Routing: Aspero shares the same bearing dimensions as R5, Soloist, R5-CX, and Caledonia, which means you can use any combination of bearing caps and stems. Want a super-racy, fully-internal look? Grab the ST31 and HB13 from R5.
SPECS:
| Frame | Cervélo All-Carbon |
| Fork | Cervélo All-Carbon, Tapered Aspero Fork |
| Rims/Wheels | [F] Reserve 40TA GR, DT Swiss 370, 12x100mm, 24H centerlock, tubeless compatible [R] Reserve 44TA GR, DT Swiss 370,12x142mm, MS freehub, 24H, centerlock, tubeless compatible |
| Hubs | N/A |
| Spokes | N/A |
| Tires | WTB Vulpine TCS Light Fast Rolling Dual DNA SG 120tpi 700x45c |
| Crankset | SRAM Rival 1 AXS E1, 40T DUB Wide |
| Chainrings | 40T |
| Bottom Bracket | SRAM DUB Wide, T47 BBright |
| Chain | SRAM Rival E1 |
| Front Derailleur | N/A |
| Rear Derailleur | SRAM Rival XPLR AXS E1 |
|
Cassette/Rear Cogs
|
SRAM Rival XPLR E1, 10-46T, 13-Speed |
| Shifters | SRAM Rival AXS E1 |
| Handlebars | Cervélo AB09 Carbon, 31.8mm clamp, 16 degree flare |
| Stem | Cervélo ST36 Alloy |
| Brakes | SRAM Rival AXS E1 w/ SRAM Paceline Centerlock Rotors |
| Pedals | Sold Separately |
| Saddle | Prologo Nago R4 PAS Steel |
| Seat Post | Cervélo SP19 Carbon 27.2 |
| Extras | Cervélo Front Computer/Accessory Mount 810, Cervélo Rear Accessory Mount, Cervélo Smartpak Top Tube Storage Bag 400A |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 910 reviews
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Product Reviews
★★★★★ 5
Best
Size: 10, Color: Espresso II/Black
The best flop ever made
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Best flip-flops I've met
Size: 11, Color: Black/Geyser
Right away I was impressed by the thichness and cushioning of these flip-flops. They are not a flimsy piece of rubber under my foot. The sole is more like that of an athletic shoe with layers and an impressive tread.
I've always found that my heel sits too much on the back edge of flip-flops, or even over it. So I ordered these just a half size large and they're perfect. The foot cradling allows my heel to sit down inside the flip-flop comfortably and securely. They're not about to fall off. The toe piece (I don't know what it's actually called) is not just the typical round rubber post. On these flip-flops it's nicely shaped and fits comfortably between my toes.
The arch support is nice too. They're not just flat.
In spite of being more substantial than the cheapies we all know, these remain lightweight. They clearly look better too
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
Well made
Size: 11, Color: Black/Geyser
The first thing that stands out about the Columbia PFG Castback Flip sandals is the solid build and clean fishing-inspired design. The Black/Geyser color combination looks sharp and matches the product photos well. The straps feel durable and comfortable against the foot, and the footbed has a slightly cushioned feel that makes them comfortable right out of the box. Overall construction feels sturdy, which is what you’d expect from something designed for outdoor or water use.
In everyday wear, the sandals are comfortable and easy to walk in. The footbed provides decent grip and support, and the textured surface helps keep your foot from sliding around when they get wet. They work well for casual use, whether it’s around the house, at the beach, or after a day on the water. The lightweight feel also makes them easy to pack for trips or outdoor activities.
After wearing them for a while, they hold up well and remain comfortable for daily use. The materials seem durable and the straps stay secure without stretching out. They’re simple, reliable sandals that work well for warm weather, boating, or casual summer wear. Overall, they’re a solid choice for anyone looking for comfortable flip flops with a slightly more rugged outdoor style.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Extremely comfortable with slight roomy fit
Size: 11, Color: Black/Geyser, Size: 11, Color: Black/Geyser
These are easily the most comfortable flip flops I have ever owned. From the moment I put them on, there was no break in period at all. They felt soft, supportive, and ready for all day wear right out of the box.
The cushioning is excellent without feeling too soft, and they have a nice stable feel when walking. They are lightweight and clearly made with quality materials, making them great for everyday use or around water.
One thing to note is that they run a little on the larger side, so if you are between sizes, you may want to consider sizing down for a better fit.
Overall, these are a great combination of comfort, durability, and function. I would absolutely recommend them, especially if comfort is your top priority. (Excuse the teeth marks- my dog unfortunately got ahold of them before I snapped the photo- they are PERFECT out of the box)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
★★★★★ 5
Comfortable Flip-Flops with a Clean, Sporty Look
Size: 13, Color: Black/Geyser
I picked up the Columbia Men’s PFG Castback Flip in the black and white colorway, and the first thing I noticed was how comfortable they felt right out of the box.
How They’ve Been Used:
Even though it’s still winter, I’ve been wearing them around the house occasionally to get a feel for the fit and comfort. I plan to use them more regularly outdoors once the weather warms up.
What Worked Well:
Immediate Comfort: The footbed feels cushioned and supportive without needing a break-in period.
Secure Fit: The straps sit comfortably without rubbing or feeling stiff.
Lightweight Design: Easy to slip on and off for quick wear.
Clean Style: The black and white combination gives them a sharp, versatile look.
Positive Feedback: My wife has already commented on how good they look.
Things to Keep in Mind:
Seasonal Use: Best suited for warmer weather and casual settings.
Sizing: Checking the size guide helps ensure the right fit.
Bottom Line:
Based on my experience so far, these flip-flops offer a great balance of comfort and style. They’re comfortable enough for everyday wear and look sharp enough for casual outings. I’m looking forward to putting them to full use once spring arrives.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
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