fahrradcomputer black friday Sigma ROX 4.0 Fahrradcomputer Set inkl. Vorbauhalterung + Pulsgurt + G
SKU: 93355172477
fahrradcomputer black friday

fahrradcomputer black friday Sigma ROX 4.0 Fahrradcomputer Set inkl. Vorbauhalterung + Pulsgurt + G

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fahrradcomputer black friday Sigma ROX 4.0 Fahrradcomputer Set inkl. Vorbauhalterung + Pulsgurt + GROX 4. 0 GPS Bike Computer mit Hhenmessung Der ROX 4. 0 GPS Fahrradcomputer untersttzt Fahrradfahrer mit seinen 30 Funktionen und seiner Bedienerfreundlichkeit auf der Fahrradtour, so dass diese sich auf das Wesentliche konzentrieren knnen: Den Spa am Fahrradfahren. Das extra groe Display zeigt Daten wie Hhenprofil, Geschwindigkeit, Distanz und Trainingszeit zuverlssig an. Navigationshinweise und die Kopplung an das E Bike und externe Sensoren sind fr

ROX 4.0 - GPS Bike Computer mit Höhenmessung
Der ROX 4.0 GPS Fahrradcomputer unterstützt Fahrradfahrer mit seinen 30 Funktionen und seiner Bedienerfreundlichkeit auf der Fahrradtour, so dass diese sich auf das Wesentliche konzentrieren können: Den Spaß am Fahrradfahren. Das extra große Display zeigt Daten wie Höhenprofil, Geschwindigkeit, Distanz und Trainingszeit zuverlässig an. Navigationshinweise und die Kopplung an das E-Bike und externe Sensoren sind für den ROX 4.0 Bike Computer selbstverständlich. Dank der kostenlosen SIGMA RIDE App lassen sich die aktuellen Fahrdaten jederzeit über die SIGMA RIDE App auf dem Smartphone verfolgen und analysieren.

Herausragendes Display
Das kontrastreiche Display ist aufgrund seiner 2,4 Zoll Diagonale und der extra-großen Ziffern auch während der Fahrt sehr gut ablesbar. Ein spezieller Red Circle oben rechts im Display ist farbig unterlegt und bietet Fahrradfahrern eine innovative und spannende Darstellung ihrer Trainingsdaten. In Kombination mit der kostenlosen SIGMA RIDE App für das Smartphone können individuelle Displayansichten mit wenigen Klicks eingestellt werden - es sind bis zu sechs Screens mit jeweils drei Werten konfigurierbar. Aktuelle Geschwindigkeit und Uhrzeit werden dauerhaft auf dem Display angezeigt.

Jederzeit startklar
Der ROX 4.0 Radcomputer wird mit wenigen Handgriffen direkt am Lenker positioniert - ganz ohne Kabel und Sensoren. Wer möchte, kann den Rox 4.0 mit zusätzlichen Sensoren zur Messung von Geschwindigkeit, Herzfrequenz und Trittfrequenz koppeln. Nach dem Einschalten ermittelt der ROX 4.0 in Sekundenschnelle mittels GPS und GLONASS die Position des Radfahrers. In Kombination mit der intuitiven Bedienung durch drei Tasten kann die Fahrradtour sofort starten.

Barometrische Höhenmessung
Ein echtes Highlight beim ROX 4.0 ist der integrierte Luftdrucksensor. Mithilfe dieser barometrischen Messung liefert er Bikern zuverlässig Informationen über die Höhe, ermittelt Steigungen und Gefälle und ermöglicht damit eine präzise Aufzeichnung der Route. Auch ein grafisches Höhenprofil kann auf dem ROX 4.0 abgerufen werden. Die Starthöhe am Beginn der Tour lässt sich automatisch per GPS kalibrieren oder kann wahlweise manuell eingestellt werden.

SEARCH & GO - die clevere 1-Punkt Navigation
Mit der „Search & Go-Navigation“ können Radfahrende schnell einen beliebigen Ort finden und dorthin navigieren. Dazu geben sie in der SIGMA RIDE App auf dem Smartphone entweder eine Adresse ein oder klicken einen beliebigen Punkt auf der Karte an. Präferenzen zu den Wegen (Radwege, unbefestigte Wege, Straßen oder Lauf- und Wanderwege) können individuell festgelegt werden. Der erstellte Track lässt sich anschließend direkt auf dem ROX 4.0 starten oder für später in der SIGMA RIDE App speichern.

Tracks von Dritten importieren
Radfahrer importieren über die SIGMA RIDE App flexibel Tracks aus dem SIGMA DATA CENTER oder aus Portalen wie beispielsweise Komoot und Strava. Der gewählte Track lässt sich sofort starten oder er kann auf dem ROX 4.0 gespeichert und zu einem späteren Zeitpunkt offline abgefahren werden. Auf diese Weise navigieren Radfahrer auf ihrer Tour, ohne dass eine Verbindung zum Smartphone bestehen muss.

Externe Sensoren
Wer noch mehr Daten oder eine noch höhere Genauigkeit seiner Werte ermitteln möchte, kann Dank ANT+ und BLE auch externe Sensoren wie Geschwindigkeits-, Herz- und Trittfrequenzsensoren an den ROX 4.0 koppeln und hat auf Wunsch alle Daten im Blick.

E-Bike ready
Der ROX 4.0 ist E-Bike ready und lässt sich kinderleicht mit vielen E-Bikes koppeln. Der GPS Bike Computer verbindet sich mit dem kompatiblen E-Bike-System und zeigt die aktuelle Unterstützungsstufe, Batteriestatus, Licht und weitere Daten auf dem Display oder im Red Circle an.

Bequeme Datenauswertung
Mit der SIGMA RIDE App werden Trainingsdaten via BLE vom ROX 4.0 zum Smartphone transferiert und gesammelt. Die wichtigsten Daten und Statistiken lassen sich mit farbigen Datenfeldern übersichtlich darstellen, jederzeit auf dem Smartphone ablesen und bequem auswerten.

Flexible Montage
Der ROX 4.0 wird mit der herkömmlichen GPS-Lenkerhaltung ausgeliefert. Diese Disc wird mit Kabelbindern wahlweise auf dem Lenker oder Vorbau des Rades montiert und der ROX 4.0 durch Eindrehen mit einem Klick fixiert.

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SKU: 93355172477

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4.1 ★★★★★
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Verified Purchase
John Haldane
Lake Worth, US
★★★★★ 4
Read it in 2 days
Format: Paperback
This is science based science fiction. How refreshing to read science without turning the story into horror. Without a plethora of characters, it is easy to remember who is who. The story moves along well enough that I wanted to keep going. It us a p age turner in many respects. All this said, there were too many crises suddenly resolved like some Star Trek episode from 1966. It reached the point where I said to myself, "OK, this doesn't matter. Move along, nothing to see here." There was good humor, some surprising twists, and enough involvement with characters that I didn't want to put it down. As science fiction goes, it was good like pulp stories go. It wasn't like Ursula LeGuin or Robert Heinlein but I would probably pick up the next book he writes.
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Reviewed in the United States on May 21, 2026
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Verified Purchase
Hanay21
Alexandria, US
★★★★★ 5
A book worth rereading
Format: Hardcover
This was a book club pick. Honestly, I wouldn't have chosen to read this myself, but I'm glad that I did. I would have missed out on an incredible story. I've been reading a lot of thriller and fantasy books lately, that I forgot how much I enjoy sci-fi. This brought it back for me. There's a lot of science-heavy discussions in the book and I loved it! When I got to a subject or term I didn't know, I would go online and learn more about it. I feel that Grace is a dork like me because he wouldn't curse. He had little anecdotes he uses in place of swearing. Something I definitely do myself! A lot of the book is the MMC talking to himself. Surprisingly, it worked. There's so much humor that it kept the story going. There was not a lull. Usually I dislike info-dumping as an introduction to get all the background story told, but I didn't mind it at all. Maybe I'm being biased because I love science talk. **SPOILERS AHEAD** What makes the whole plot engaging is the fact that the plot doesn't seem too fantastical. It's something that could happen. There's a lot of ethics and morals involved in determining what should be done. I would hate to be in a position where I have to chose what's best for everyone. That's why Stratt is a necessary character. I hated some of her decisions and how she operated, but you need someone who's focused on the general welfare of humanity. I would be too focused on myself, my family, etc. As much as it hurts to admit, I'm selfish (and a coward) like Grace. I wouldn't want to die. But was it right for Stratt to force him on the mission? This could also be taken religiously. If God has a plan and things happen for a reason, is it our right to deter what's going to happen? God wiped out the world many times because of humanity's sins, what if this was God's doing? So many questions and debates on right vs wrong, ethics vs morals, and religion vs humanity made for a incredible book club discussion. I love how this book ended. I wish I could continue reading about Rocky and Grace's adventures, it's that fascinating. However, I think Grace staying on Erid was the best outcome. If the roles were reversed, I don't think Rocky would have the same welcome. I feel that those in charge would have dissected and kept Rocky hostage, all in the name of science. Just as the Astrophage were first introduced, the first things the scientists did was poke and probe. Essentially torturing the Astrophage to see what makes them tick. I think Rocky would have the same fate. Oh, and my favorite part is the relationship between Rocky and Grace. I cried so many times when I was reading. Scared that something bad was going to happen to either of them. Especially in the scene where Rocky busted out of his tunnel to save Grace. I got upset and told the book that 'if Rocky dies, I swear, this is the worst book ever!' And the scene where Rocky learns about radiation poisoning. How he slowly becomes aware of what happened to his crew, his friends. I was a mess. This book is definitely one that I could go back and reread. I did watch the movie afterwards. There's a lot of differences to adapt the story to screen, but it was okay. They got the humor down pat, but I didn't get the direness of the whole situation nor the special bond that both MCs had.
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Reviewed in the United States on April 20, 2026
K
Verified Purchase
Kindle Customer
Grantham, US
★★★★★ 5
Excellent story
Format: Kindle
This book is worth your time. It is a great introduction to a variety of scientific disciplines without insulting the reader. It also respects and understands humanity, engineering, history and political science. Then it lays that foundation to tell the story of a unique friendship of two beings with mutual goals who have to communicate and problem solve together. Along the way, you can really contrast how Grace and Rocky do it, vice the Hail Mary team did it.
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Reviewed in the United States on May 22, 2026
G
Verified Purchase
Gilligan
Charlottesville, US
★★★★★ 5
A Brilliant, Emotional, and Unforgettable Sci-Fi Adventure
Format: Paperback
Project Hail Mary by Andy Weir is one of those rare novels that delivers everything you could want from science fiction: gripping suspense, fascinating science, humor, heart, and a genuinely moving story about survival and friendship. The novel follows Ryland Grace, a middle school science teacher who wakes up alone on a spacecraft with no memory of who he is or why he’s there. As his memories slowly return, the stakes become clear: humanity is facing extinction, and he may be the only person who can stop it. The mystery unfolds at a perfect pace, blending high tension with moments of discovery that keep you turning the pages. What makes this book stand out is how seamlessly it combines hard science with accessibility. Like the author’s earlier work, the scientific details feel authentic and well researched, but they never overwhelm the story. Instead, the problem-solving becomes the engine of the plot. Each obstacle feels real, and the solutions are both clever and satisfying. The biggest surprise—and the emotional core of the novel—is the relationship that develops during the mission. Without giving anything away, it adds warmth, humor, and depth that elevate the story far beyond a typical survival thriller. By the end, the novel becomes less about science and more about courage, trust, and the willingness to sacrifice for others. The pacing is excellent throughout, with a balance of suspense, humor, and heartfelt moments. If there’s a small drawback, it’s that some plot developments feel a bit convenient. But the strong characters and emotional payoff more than make up for it. Overall, this is a must-read for fans of science fiction, space exploration, and anyone who enjoys smart, character-driven storytelling. It’s thrilling, funny, deeply human, and surprisingly emotional. I finished it feeling both entertained and uplifted. Highly recommended.
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Reviewed in the United States on February 19, 2026
T
Verified Purchase
T. Snellgrove
Louisville, US
★★★★★ 5
Spoiler-free Review - The Martian Dialed Up To 11
Format: Kindle
If you loved the Martian in either book or movie form, Project Hail Mary will likely delight you. The main character (who I'll leave nameless to avoid spoilers) is nearly identical to The Martian's lead, Mark Watney. They have similar personalities, the same fundamental mission of surviving in a hostile environment, and both use real-world biology, chemistry, and physics to solve their problems from start to finish. The book provides an early test for whether or not you'll enjoy it: on page five, when our protagonist is being quizzed by an annoyingly paternalistic computer that is demanding to know the cube root of eight, our hero replies with the smart aleck answer: "two times e to the two-i-pi". If you find this interaction amusing, all good; if it's off-putting, turn back now. In fairness, Project Hail Mary shares The Martian's flaws as well. The protagonist's character is a bit better developed - but only slightly. The conflict is entirely man-vs-environment. And though the protagonist is often in situations that might cause one to ponder the essential truths of the human condition, he never does. His personality and behavior as a sarcastic problem-solving scientist / engineer are pitch-perfect but the book rarely goes any deeper. He has an established motivation and a flaw to be overcome - but these are really just superficial grace-notes (see what I did there?). This is not Crime and Punishment. Instead, it's a page-turning action-hero book - where instead of firing shots, the action hero saves the day by doing science really well. Books that celebrate real science are rare, so if that's what you came for, you're going to love what Project Hail Mary delivers. Although largely similar, there are four main ways in which Project Hail Mary differs on the Martian so I'll touch on those now: 1. The stakes are higher - much higher! In The Martian, Mark Watney is already a bit of a super hero - he's an astronaut after all - and all he really needs to do is stay alive. In Project Hail Mary, our hero is much more of an every-man and his job is nothing less than to save the human race. 2. The Martian is told in chronological order. In Project Hail Mary, our hero awakens with a serious case of amnesia and can't even remember his own name. He starts his adventures at essentially the most dull part of his recent life. As time passes he both tackles dramatic new challenges and remembers the wild adventures that brought him here. Andy Weir does a fantastic job of interweaving the past and the present and the result is a very effective narrative framework that lands on a "Wow!" moment at the end of nearly every chapter. 3. Project Hail Mary is a buddy story. In The Martian, Mark Watney is alone in his battle against the elements of Mars for nearly the entire book. By contrast, Project Hail Mary, once it really gets going, is absolutely a tale of buddy-bonding. This surprised and, ultimately, delighted me. It helps give the protagonist a bit more of a human side. And the team problem-solving scenes are, again, pitch-perfect. 4. Project Hail Mary puts the 'fiction' back in Science Fiction. In The Martian, leaving aside the opening wind storm and the closing chapter of wish-fulfillment heroics, we are essentially in a very tightly written NASA simulation. I found this incredibly enjoyable - but one could reasonably ask, where are the big ideas? Where are the bold 'what ifs'? The answer is, they're in Project Hail Mary! The science is still real and omni-present, but the fiction is big, bold, and awesome. If you're main draw for the Martian was the NASA lore and you wished Weir would write an even tighter sequel detailing the Apollo 13 events, you may be a bit disappointed - but everyone else is going to love this change of pace! So that's it in a nutshell: Project Hail Mary is a fantastic next book to read after The Martian. It's a clear spiritual successor but brings new ideas and structure to the game. Enjoy!
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Reviewed in the United States on February 16, 2025

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