This 1/12-scale component is a front lower A-arm spring sold by Yokomo as model R12-10LHS, rated hyper soft for R12/GT series setups. It is intended for RC chassis tuning and not for full-size vehicles.
The spring fits the front suspension of R12/GT series cars and provides a softer rate to increase front compliance, helping tune front grip and body roll through low-speed direction changes and over small surface bumps.
Installation overview: the spring fits onto the lower A-arm spring seat of the front suspension on supported R12/GT chassis. Follow the chassis manufacturer's standard disassembly steps for the front suspension when changing springs, and confirm correct spring seating and travel after installation.
Tuning role: fit the hyper soft lower A-arm spring to make the front respond more compliantly to minor bumps or to slightly soften initial turn-in bite; pair it with suitable damper oil and anti-roll bar settings to dial in balance.
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