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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Aspero GRX RX820In 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 30 GR AL, Reserve 4LD, 12x100mm, 24H, centerlock, tubeless compatible [R] Reserve 30 GR AL, Reserve 4LD, 12x142mm, XDR freehub, 24H, centerlock, tubeless compatible |
| Hubs | N/A |
| Spokes | N/A |
| Tires | WTB Vulpine TCS Light Fast Rolling Dual DNA 60tpi 700x45c |
| Crankset | Shimano GRX, RX820, 48/31T |
| Chainrings | 48/31T |
| Bottom Bracket | FSA, T47 BBright for 24mm spindle |
| Chain | Shimano M8100 |
| Front Derailleur | Shimano GRX, RX820 |
| Rear Derailleur | Shimano GRX, RX820 |
|
Cassette/Rear Cogs
|
Shimano HG710, 11-36T, 12-Speed |
| Shifters | Shimano GRX, RX820 |
| Handlebars | Cervélo AB09 Carbon, 31.8mm clamp, 16 degree flare |
| Stem | Cervélo ST36 Alloy |
| Brakes | Shimano GRX, RX820 w/ Shimano CL800 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
4.7 ★★★★★
Based on 218 reviews
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Product Reviews
★★★★★ 5
Good for small dogs
Size: Small - 2 Count (Pack of 1)
These are great for small dogs that have trouble getting their mouth around a regular size tennis ball. My only issue is that they are small enough to roll under things and I end up having to move furniture to find them. My dog loves them.
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Reviewed in the United States on February 13, 2026
★★★★★ 5
Chuckit! Max Glow Ball Dog Toy - A Canine Delight in the Dark!
Size: Small, Pattern Name: Pack of 1
I recently introduced the Chuckit! Max Glow Ball Dog Toy to my furry friend, and it has quickly become a favorite in our playtime routine. Here's why it deserves a glowing 5-star review:
**Pros:**
**1. Day and Night Fun:**
The Max Glow feature of this ball adds an extra layer of excitement to playtime. Whether it's a sunny day or a moonlit night, my dog can enjoy fetching and playing with this ball anytime, making it a versatile and engaging toy.
**2. Long-Lasting Glow:**
The glow effect lasts surprisingly long, providing extended play sessions even after the sun sets. The consistent glow adds a thrilling element to our nighttime activities, making it a standout feature of this toy.
**3. Durable Design:**
The Chuckit! Max Glow Ball is built to last. Its durable construction can withstand the enthusiastic chewing and fetching antics of my dog, ensuring longevity and making it a reliable addition to our collection of toys.
**4. Easy to Clean:**
Cleaning this ball is a breeze. Whether it's muddy paw prints or slobber, a quick rinse under the tap is all it takes to keep the Chuckit! Max Glow Ball looking and feeling fresh for the next round of play.
**5. Compatible with Chuckit! Launchers:**
The ball is compatible with Chuckit! launchers, adding an extra layer of fun to our play sessions. The launcher allows for longer throws, providing a good workout for my dog and adding an interactive aspect to our outdoor activities.
**6. Fetching Favorite:**
My dog absolutely loves fetching this ball. The texture and size make it easy for him to carry in his mouth, and the glowing feature captures his attention and keeps him engaged during playtime.
**7. Versatile Outdoor Toy:**
Whether it's a game of fetch in the backyard, a trip to the park, or an evening stroll, the Chuckit! Max Glow Ball has become our go-to outdoor toy. Its versatility and engaging qualities make it an essential part of our canine adventures.
In conclusion, the Chuckit! Max Glow Ball Dog Toy has brought endless joy and excitement to our playtime routine. Its durable design, long-lasting glow, and compatibility with Chuckit! launchers make it a 5-star favorite in my dog's toy collection. If you're looking to add a touch of magic to your dog's play sessions, this glowing ball is a must-have. Let the nighttime playtime adventures begin! 🌙🐾🌟
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Reviewed in the United States on January 26, 2024
★★★★★ 5
I've bought like 20! Love them!!!
Size: Large, Pattern Name: Pack of 1
My dog is obsessed with this ball! Glow in the Dark is super bouncy, easy to spot at night, and tough enough to handle rough play. Perfect for evening fetch sessions—fun for both of us! We have bought about 20 of these so far. I always bring my dog to play fetch at night, and this is perfect if you're playing in a field or beach. Glows in the dark so both you and your dog can see it. The size of the ball is great for my big dog. It is also the perfect type of silicone so that my dog cannot easily tear it apart and chew it, which is GREAT! We do NOT want our dog's ingesting silicone at all. If you have a ball chewer, this ball is perfect and durable. Chewing ability is good and is not too tough but tough enough.
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Reviewed in the United States on August 10, 2025
★★★★★ 5
Cane Corso approved....
Size: Large, Pattern Name: Pack of 1
My Cane Corso loves this ball!!! She carries it around in her mouth like a round pacifier.
Sometimes I'll wake up with the ball next to my head on my pillow. Lol
This is the third one I've bought.
She doesn't destroy them at all . Somehow she loses them. Yesterday she had two floating around. Lol.
Earlier I gave her one of those hard rubber balls with feet... She destroyed it within minutes. She can skin a tennis ball and chew it in half in about 5 minutes.
This ball is by far a favorite toy of her's. And she doesn't chew it to bits .
And it glows in the dark which is fun for playing fetch at night.
It's very easy to clean.
Sometimes I put little snacks inside for her while she's laying down with her ball.
I will definitely keep buying these balls everytime we lose one . They make her happy. And that makes me happy.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
BEST GLOW BALL! MY COLLIE BLUE HEELER MIX IS OBSESSED
Size: Large, Pattern Name: Pack of 1
Well if I could just say...Mommas a fan too....BUT I think my dog should be the sponsor of CHUCKIT because he owns everything and he BREATHES, DREAMS, RUNS with #chuckit balls!! Since 8wks. old & Now 10 yrs young, BDAY=8.10.26....he wakes up with it in his mouth and falls asleep with IT! I HAVE THEEEE PROOF LOL SERIOUSLY OBSESSED! #chuckit #makemydogyoursponsor WE HAVE EVERY BALL X10 FOR SOME, launchers, bucket o balls , you name it so yeah #obssesedisanunderstatement #bordercollieblueheelermix #HARLEY ♡ nice colors and the durability is amazing 👏 know if you have a chewer I'm not sure because he just likes to catch the ball and then chew it sometimes and then leave it alone, until next time around. But the GLOW BALL just being cewed for so long and the textire is obviously different so it does end up cracking and you throw it away, definitely different rubber but highly recommend them both actually ALL of them👌🎉🥳🫶🏼 my Sisters 2 yr old pit destroyed them in minutes but only FOR PLAY , so IF YOU DONT WANT THAT BALL chewed to pcs. Put it up LOL and oh
all of the balls EXCEPT the GLOW BALL stay true to form and durability, for real Harleys had some of them for years!! And nothing wrong with the CHUCKIT ball 10☆☆☆☆☆☆☆☆☆☆ SIZE is perfect too he love the medium 2.5" ball. Perfect for catching for hrs on end. You also have a choice you can get squeaky, crunchy,or nothing or glow in the dark, 3 sizes to fit your pupper..
.. so many choices and it doesn't have to be a ball you can pick from a ton of toys ' tuggers ,launchers and indoor toys too. As for the Chew resistance...mm touchy...like I said. Aggressive chewer are more likely to tear it up way quicker than the just playing mainly like I want to fetch dog. Either way. I dont purchase any other brand besides chuck it. Has always my pick, like 20+ yrs now lol. Hands down. This is not a paid thing or promoted or whatever. Just felt i should review for chuck it♡ to date has made my dog happy and healthier for years to come♡ thanks
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Reviewed in the United States on May 8, 2026
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