Core Skills Analysis
Mathematics
The student measured the lengths of the derailleur hanger and chainstay, calculated the gear ratio changes caused by the new SRAM GX Eagle AXS cassette, and used multiplication to determine the expected cadence at various speeds. They applied unit conversion skills to switch between metric and imperial measurements and recorded the torque values required for proper bolt tightening. By comparing the original and upgraded gear counts, the student practiced ratio and proportion concepts to predict performance gains.
Science (Physical Science & Engineering)
The student explored the principles of mechanical advantage by installing the electronic shifting system and observing how cable tension and gear size affect bike propulsion. They examined how the AXS wireless technology uses radio frequency signals to communicate between shifters and derailleurs, linking it to basic concepts of electricity and magnetism. Through hands‑on assembly, the student practiced problem‑solving by troubleshooting mis‑alignments and ensuring smooth gear transitions.
Language Arts (Technical Reading & Communication)
The student read the SRAM GX Eagle AXS installation manual, identified key procedural steps, and highlighted safety warnings, demonstrating comprehension of technical text. They summarized the process in their own words and labeled a diagram of the drivetrain, strengthening informational writing skills. By explaining the upgrade to a family member, the student practiced oral presentation and clear communication of complex ideas.
Tips
To deepen understanding, have the student create a gear‑ratio chart that predicts speed at different cadences, then test the predictions on a short ride. Next, set up a simple experiment measuring the force required to shift gears with and without the AXS system, recording data in a table. Encourage the learner to write a short how‑to guide or video script describing the upgrade for a beginner audience, reinforcing technical writing. Finally, explore related engineering concepts by designing a miniature bike model that illustrates gear changes using cardboard and rubber bands.
Book Recommendations
- The Way Things Work Now by David Macaulay: A visual guide that explains the mechanics behind everyday machines, including gears and bicycle technology, perfect for curious young engineers.
- Cool Physics: The Science Behind Sports by Paul W. Sutter: Explores the physics of motion, force, and energy in sports like cycling, helping students connect real‑world activities to scientific principles.
- How to Build a Bike by Tom Irvine: A step‑by‑step handbook for assembling and maintaining bicycles, offering clear instructions and safety tips for hands‑on learners.
Learning Standards
- CCSS.MATH.CONTENT.5.NF.B.6 – Perform operations with fractions and decimals to solve real‑world problems (calculating gear ratios).
- CCSS.MATH.CONTENT.6.RP.A.3 – Use ratio and rate reasoning to solve practical problems (speed vs. cadence).
- CCSS.ELA-LITERACY.RI.5.1 – Quote accurately from a text when explaining technical procedures (reading the manual).
- CCSS.ELA-LITERACY.W.5.2 – Write informative/explanatory texts to examine a topic (creating a how‑to guide).
- NGSS MS-PS2-2 (applied within Common Core context) – Analyze forces and motion in mechanical systems (understanding shifting mechanics).
Try This Next
- Worksheet: Calculate gear‑ratio tables for the original cassette vs. the new 12‑speed cassette and graph the results.
- Quiz: Multiple‑choice questions on torque values, wireless communication basics, and safety precautions from the manual.
- Drawing Task: Sketch the drivetrain before and after the upgrade, labeling each component and its function.
- Writing Prompt: Compose a short “Instruction Manual” for a peer, using clear steps, diagrams, and warning notices.