Samix Traxxas TRX-4 Brass Shock Spring Cup

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The Samix Traxxas TRX-4 Brass Lower Shock/Link Mount Set is a precision machined spring cup option that adds 25 grams of unsprung weight to the axles of your TRX-4, for improved CG and overall performance. Unlike other brass parts, these feature a stealthy black finish, with laser etched logos that give the parts a scale look with a touch of bling.


  • Pack of four brass shock spring cups
  • Adds 25g to help lower CG and improve performance
  • Slotless design will not fall off when running a soft spring
  • Direct fit on stock shock
  • Machined from high quality brass material with black coating to avoid oxidation
  • Laser etched SAMIX logo

This product was added to our catalog on November 16, 2017

Alexander Mckeown
Verified Owner
Monday, Jan 8 2018 (11 months ago)
Samix Traxxas TRX-4 Brass Shock Spring Cup
I purchased all except the link balls. I have two buddies that have TRX4 also and they cannot climb what I can same wheels and tires (stock traxxas) I can be at 45* and keep going no problems. The fitment is totally legit. I was a machinist and I have to sat NICE! No problems there. These are worth every penny. I will purchase samix parts in future if they start to make diff covers also. I am impressed with the quality.