This is an RC-scale carbon rear shock stay made for the KYOSHO Optima 2016 chassis, supplied under the JR-OT11 reference. The part serves as the mounting plate for the rear shock absorbers and is intended to replace or upgrade the stock stay to alter mounting stiffness and shock geometry without changing the shocks themselves.
Use this stay when you need a stiffer, lighter mounting point for rear shocks to explore handling changes; installation focuses on alignment and secure fastenings, check existing hole patterns match the Optima 2016 layout before fitting. The piece is described as carbon to indicate the material family commonly used for lower weight and increased torsional rigidity in RC parts.
When tuning, treat the stay as part of the suspension system: small changes in mounting position or shock angles will affect rear traction and rebound behavior, so verify setup on a test run and make incremental adjustments to preload, shock length, and damping to reach the desired balance.
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