YOKOMO R12/GT series Shock Spring Cup R12-37C Compatible with Yokomo  [R12-37C]

Yokomo R12-37C Shock Spring Cup for YOKOMO R12/GT series
Price:
£1.88
Brand:
Yokomo
Model:
R12-37C
GTIN:
3888
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Spares / Hop-ups - Yokomo - R12 category
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Fitment and inspection guide

Built for Yokomo R12/GT series touring car shocks, this spring cup holds the coil spring on the shaft and delivers a defined contact point for preload and travel adjustments. The part is for precise positioning and complements established shock servicing and tuning routines.

Fitting procedure: remove the shock cap and any threaded collar as required, position the cup on the seating surface of the shock shaft, then reassemble while ensuring the spring seats evenly. Use standard small hand tools and confirm there is no excess play after tightening. No specialised press is normally necessary for compatible shock bodies.

Practical advice: altering cup height will change effective spring preload and where travel begins, influencing ride height and initial suspension response. Make measured adjustments and test the car to evaluate handling. Regular inspection for damage or deformation maintains consistent spring seating and repeatable setups.

Compatible Models

  • GT5-R2
  • GT5-RS2
  • YR-R12C3
  • YR-R12C31
  • YRF-001RF
  • YRF-001W
  • GT5-R35
  • GT5-SC430
  • GT3-REA
  • GT3-IS350
  • GT3-B4
  • GT3-CAX
  • GT3-BRZ
  • GT3-AHP
  • GT-B
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 can I confirm this cup matches my shock variant?

Compare your shock model code with the compatible list provided. The cup is intended for the listed R12/GT series variants; if your shock code is not listed, check measurements or consult a parts guide before fitting.

What should I look for during routine inspection?

Inspect the cup for nicks, deformation or sharp burrs that could prevent even spring seating. Also check the shaft end and surrounding collars to ensure smooth operation and predictable contact.

Will using this cup require spring changes?

No. The cup sets spring position and preload but does not alter the inherent spring rate. You can tune preload and travel with the cup while keeping existing springs, unless a different rate is specifically desired for handling goals.

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