Yokomo R12-21SS Soft Rear Side Roll Spring - Race Tuning  [R12-21SS]

Yokomo R12-21SS Rear Side Roll Spring Black (Soft) for YRX12/GT/YR-10F
Price:
CAD$4.41
Brand:
Yokomo
Model:
R12-21SS
GTIN:
3888
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Fine Tune Handling with the Yokomo R12-21SS

If you want to sharpen rear-end balance, the Yokomo R12-21SS rear side roll spring gives a softer response that helps control weight transfer through corners. Built for the YRX12, GT and YR-10F platforms, this black soft spring is a straightforward upgrade for drivers aiming to refine handling on smooth race surfaces.

Setup Benefits and Fitment

The R12-21SS is made to soften rear roll stiffness, improving rear grip during mid and high speed turns. It fits a range of Yokomo chassis and lets you dial settings to match track grip and driving style.

Suitable Models

  • YR-10F
  • GT5-R35
  • GT5-SC430
  • GT3-REA
  • GT3-IS350
  • GT3-B4
  • GT3-CAX
  • GT3-BRZ
  • GT3-AHP
  • GT-B
  • GT5-R2
  • GT5-RS2
  • YR-R12C3
  • YR-R12C31
  • YR-X12
  • YRF-001RF
  • YRF-001W
  • YR-X1219
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

How will the R12-21SS change corner entry?

The softer rear side roll spring increases body roll at entry, which can help the tyres maintain contact and reduce sudden oversteer. Expect a smoother transition into the turn.

Which chassis should I try this spring on first?

Start with YRX12 or YR-10F models if you want a direct comparison to stock behaviour. Fit it to one side at a time to gauge rear balance before swapping both springs.

Any tips for tuning when using this spring?

Combine the R12-21SS with small rear toe or anti-roll adjustments to fine tune rotation. Make incremental changes and test a few laps to find the best setting for grip and steering feel.

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