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Description
gravel bike ultegra di2 RIRAChapter2 RIRA Complete Bike Precision Performance, Inspired by the Ride The Chapter2 RIRA Complete Bike with Shimano Ultegra Di2 is a race ready machine designed for pure speed, effortless shifting, and precise handling. Whether youre tackling a fast paced criterium, a long endurance ride, or an all out attack on a climb, this build delivers the perfect balance of aerodynamics, stiffness, and comfort to maximize your performance. Precision Carbon
Chapter2 RIRA Complete Bike – Precision Performance, Inspired by the Ride
The Chapter2 RIRA Complete Bike with Shimano Ultegra Di2 is a race-ready machine designed for pure speed, effortless shifting, and precise handling. Whether you’re tackling a fast-paced criterium, a long endurance ride, or an all-out attack on a climb, this build delivers the perfect balance of aerodynamics, stiffness, and comfort to maximize your performance.
Precision Carbon Engineering for Ultimate Efficiency
Built from 100% Toray carbon fiber in Japan, the RIRA frame and fork are engineered to provide explosive power transfer, optimal aerodynamics, and responsive handling. The T47 ceramic bottom bracket enhances efficiency, ensuring that every watt of effort translates to smooth, powerful movement. The fully integrated MANA5 handlebar and stem create a sleek, cable-free cockpit, optimizing airflow while allowing for customized width and length options. Paired with the TUMU carbon seatpost and TCP 3D-printed carbon saddle, the RIRA ensures long-distance comfort while maintaining an aggressive race posture.
Shimano Ultegra Di2 – Pro-Level Performance Without Compromise
The Shimano Ultegra Di2 12-speed groupset brings lightning-fast, wireless shifting and top-tier braking performance, making this build a true high-performance race machine. With compact (50/34) and mid-compact (52/36) crankset options paired with 11-30T or 11-34T cassettes, riders get the versatility to power through flats, attack climbs, and maintain control on technical descents. The Shimano Ultegra hydraulic disc brakes with CL800 rotors (140mm or 160mm) ensure consistent, powerful stopping power in all conditions.
UNAAS HARD2 Carbon Wheels – Aero Meets Stability
To maximize speed and efficiency, the RIRA Complete Bike is equipped with the UNAAS HARD2 50mm carbon wheelset, delivering the perfect balance of lightweight acceleration, aerodynamic performance, and stability in crosswinds. Wrapped in Goodyear Eagle F1 R tires (700x28c or 700x30c, available in black or tan wall), this setup ensures low rolling resistance, exceptional grip, and a smooth, confident ride across all road conditions.
Whether you’re a seasoned racer, an ambitious Gran Fondo rider, or simply someone looking for an ultra-refined road machine, the RIRA Complete Bike with Shimano Ultegra Di2 is built to elevate your ride and deliver top-tier performance every time you hit the road.
Key Specifications
- Frame & Fork: Chapter2 RIRA Carbon – 100% Made in Japan by Toray
- Cockpit: MANA5 Integrated Handlebar/Stem (Customizable Length + Width), Chapter2 Black Bar Tape
- Drivetrain: Shimano Ultegra Di2 12-speed (50/34 or 52/36 Crankset + 11-30 or 11-34 Cassette)
- Brakes: Shimano Ultegra Di2 Hydraulic Disc, Shimano CL800 Rotors (140mm or 160mm)
- Wheels: UNAAS HARD2 Carbon Wheelset – 50mm
- Tyres: Goodyear Eagle F1 R (700x28c or 700x30c) – Black or Tan Wall
- Bottom Bracket: Wishbone T47 Ceramic Bearings
- Saddle & Seatpost: TCP 3D Printed Carbon Saddle, Chapter2 TUMU 27.2mm Carbon Seatpost
The RIRA Complete Bike with Shimano Ultegra Di2 delivers a winning combination of cutting-edge technology, lightweight carbon engineering, and premium components, making it the perfect choice for riders who demand the best in speed, control, and efficiency.
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
4.1 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Tabs work 100 per cent
Product worked well for my system. A bit too well. I took a whole tab the first night and l was out before planned. Too 1/4 tab the second time and it felt more natural.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 4
Extra strength melatonin
This item is ok to take only as needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
★★★★★ 5
Good product
Worked well on my silver jewelry chains.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Amazon Melatonin? Amazing!
These work as well or better than some of the more expensive ones my wife usually gets. They don't dissolve in your mouth and they arent gummies. No extra sugars involved. Puts me to sleep quite well and allows me to stay asleep. No bad taste, no weird dreams. No side effects.
Absolute gem of a find on Amazon. Great price for a great night sleep.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
"Take this sinus infection!"
Size: 100 Count (Pack of 1)
I am a chronic sufferer of bacterial sinus infection. Ask me why, and I can give you some long winded explanation about a slightly deviated septum and sinus design, and a slew of other stuff that I've read and heard from my doctor. Bottom line, both you and I don't care the reasoning, but rather, preventative care. I can tell you that these Elderberry capsules help. If I get "that feeling" like a sinus infection is impending, I'll start popping two of these twice a day. 9 times out of 10, I can stave off the infection from grabbing a foothold in my sinuses long enough to let my immune system kick it completely out (without antibiotics and/or steroids).
Does it help get rid of a sinus infection already in place?: inconclusive from my experience. Once I have a sinus infection, it takes about the same amount of time to get rid of it whether or not I'm taking it. Maybe I get rid of it a day soon, but statistically that's probably considered to be "noise in the data".
Does it work for flu and other viral colds? I can't tell you that. I know that bacterial sinus infections can be precipitated by viral infections, but excluding bacterial sinus infection, I don't get sick. I've had the flu maybe twice in the last 20 years. Bottom line I have no experience with regard to using this to fight flu. Can't hurt to try though (I don't think you can OD on berries easily, could be wrong though).
Does it have any other benefits? I don't know, maybe. Again I can only speak from experience. I take them, it staves off a sinus infection. I get that there are a lot of other beneficial claims about elderberry, but I have personally never noticed/experienced them.
Is this just another homeopathic snake oil? No. While I agree that there are a lot of homeopathic "remedies" out there that don't work and are probably just a placebo effect, there are also ones out there that work. Heck, I've experienced allergic reactions to homeopathic remedies that landed me in worse trouble than before. Elderberry is a homeopathic remedy that works for me. Will it work for you? Maybe, maybe not, every body is different, and it could be that my body utilizes it due to a deficiency of something that elderberry has.
Summary (tl;dr): Get it and try the bottle once. You can take it all the time, but I find it sufficient to take them when I feel a sinus infection coming on (I mean, who *wants* to take a bunch of pills at breakfast). Berry form is probably preferable, but the capsules are convenient and store for long periods of time without getting mildew-y. The price is right, it staves off sinus infections, and probably works for staving off other colds as well. Can't hurt to find out if your body responds to it.
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Reviewed in the United States on October 3, 2013
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