Alternate BOM naming for the rear wheel spindle.
No part-specific design process is documented. The Wheel Hubs subsystem design process applies: 1. Take wheel loads from the cornering, braking and combined load cases. 2. Size the spindle shaft for fatigue at the worst case, then size up to an appropriate bearing and remove as much inner material as possible. 3. Select bearings on required bore, spacing and its effect on moment reaction, static load rating against worst-case load, dynamic load rating against average load and expected life, and then the lightest and smallest option that fits. 4. Design the upright to connect the geometry points, sizing every hole and tab. 5. Analyse. Wheel load applied as a remote load from the contact patch to the bearing faces; lower ball joint and tie rod mount bolt faces react lateral and longitudinal motion; upper ball joint reacts all translation; brake caliper bolt faces take a moment reaction for braking. Global element size 0.045 in, second-order wedge elements. 6. Cross-check with the full-corner model, then state the resulting compliance. CR26I effective angular deformation of the corner in cornering is 0.32 degrees of camber change, including spindle, bearings, upright, tie rod mount and top mount.
Al 7075-T6.
None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.
Measured mass: 642.0 g average across 2 weighed instances (RL Spindle 649.0 g, RR Spindle 635.0 g), uncertainty +-.5 g. Left-to-right deviation 2.20%. Weighed mass: 649.0 g (1.431 lb), 744.5 g (1.641 lb) (recorded as: RL Spindle). Weighed mass: 635.0 g (1.400 lb), 718.2 g (1.583 lb) (recorded as: RR Spindle). Measured mass, as built: CR25 744.5 g (1.641 lb) (weighed as: RL Spindle). Measured mass, as built: CR25 718.2 g (1.583 lb) (weighed as: RR Spindle). CAD mass, CR26E master assembly: 2.846 lb (1.291 kg). CG at X 83.00 in, Y -26.28 in, Z 8.00 in in vehicle coordinates. (CAD component: CR26E_Spindle_RL_RevFINAL) CAD mass, CR26E master assembly: 1.423 lb (0.645 kg). CG at X 83.00 in, Y 22.87 in, Z 8.00 in in vehicle coordinates. (CAD component: CR26E_Spindle_RR_Rev3) CAD mass, CR22 master assembly: 1.419 lb (0.644 kg). CG at X 83.00 in, Y -23.12 in, Z 9.00 in in vehicle coordinates. (CAD component: CR22_SUS_RL_Spindle_RevFinal) Dimensions called out on the cost report drawings. These are the figures printed on the drawing, not a labelled specification; open the drawing itself for what each one refers to. CR22_SUS_RL_Spindle_Rev2_R (in): 7.000, 7.50, 5.49, 0.80, 9.12, 8.00 R0.70, 6x 0.483, 0.008, R12.15, 3.22 CR22_SUS_RL_Spindle_Rev2_R (mm): 70.00, 75.00, 54.9, 8.00, 91.19, 80.00 R7.00, 6x 4.826, 0.076, R121.50, 32.23 CR26I_RearSpindle (mm): 15.15, 151.52, 5.25, 52.50, 6.00, 60.00, 5.49, 54.87, 70.00, 7.00 Source: CR22 Suspension Component Weights.xlsx (weighed, not CAD) | Subteam weight books: CR22/Suspension/Validation/Full System Analysis/Component Weights.xlsx | CR26e Weight Tracker.xlsx, Final IRL Weights (weighed, not CAD) | SolidWorks mass model exports: CR22 (5 May 2024), CR25 (4 Jul 2025), CR26I (30 Jul 2025), CR26E (22 Mar 2026) | Cost report drawings: CR22/Document Submissions/Cost Report/Suspension/Cost Report Drawings/Wheels, Wheel Bearings & Tires/Rear Wheel Spindle/CR22_SUS_RL_Spindle_Rev2_R.pdf; CR22/Suspension/Design/01_Cost_Report/Cost Report Drawings/Wheels, Wheel Bearings & Tires/Rear Wheel Spindle/CR22_SUS_RL_Spindle_Rev2_R.pdf; CR26i/Suspension/Competition/Cost Report Drawings/Wheels, Wheel Bearings and Tires/Rear Wheel Spindle/CR26I_RearSpindle.pdf Quantity per car, as costed: 2
Nothing in CrimsonStorage covers these yet.