Parts/Suspension & steering/Suspension arms & hubs/RPM Caster & Spindle Block Set for Traxxas 4x4 Slash/Rustler/Stampede (Black)
RPM Caster & Spindle Block Set for Traxxas 4x4 Slash/Rustler/Stampede (Black)
RPM

RPM Caster & Spindle Block Set for Traxxas 4x4 Slash/Rustler/Stampede (Black)

Part # RPM735924.0(3)
Where to buy
$17.99
AMain Hobbies
Seen Oct 12, 2026
$17.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This is an optional RPM Traxxas 4x4 Caster & Spindle Block Set. Since the release of the first Slash 4x4, RPM customers have been asking for stronger front end components that could handle the punishment Traxxas 4wd trucks can dish out. RPM answers the call with these Caster & Steering Blocks for these awesome Traxxas trucks. Starting with a blank slate, drew in the necessary design elements and developed a design with a focus on punishment survivability. The core design of these caster blocks revolve around the lower-case “H” structure which provides extreme rigidity to keep camber and caster setting locked in place while running normally, manufactured from materials that provide serious impact absorption characteristics to prevent breakage when those “oops” moments inevitably arise.

RPM Slash 4x4 / Stampede 4x4 front-end components are made from RPM's trademark blend of indestructible materials and come factory backed by their limited lifetime warranty for strength and durability you know you can trust! RPM steering blocks have also been engineered for durability, strength, rigidity and crash-survivability. More material surrounds the kingpin posts while smoother flowing turnbuckle arms provide a consistent feel and great performance from the steering system.

NOTE:
RPM caster blocks and steering blocks for the Slash 4x4, Stampede 4x4 and Rally are sold as a set, including 2 caster blocks and 2 spindle blocks. These parts are not interchangeable with stock or aftermarket steering blocks / caster blocks. Running any part of this system with other stock or aftermarket steering blocks or caster blocks may void the RPM warranty.

Reviews4.0 · 3 reviews

Steven Dauberon RPM Caster & Spindle Block Set for Traxxas 4x4

Yet another Quality part from RPM. I bought these to put on my Traxxas Rally but they only work with the Stock Driveshafts. I only run MIP driveshafts and they will not work with them. The yokes on the MIP shafts are too big. I tried to grind some material off but they kept binding. I really wish RPM would make there stuff work with MIP Driveshafts.

3 found this helpful
Keith SherrillVerified owneron RPM Caster & Spindle Block Set for Traxxas 4x4

Good and durable. I have the Traxxas steel splined axles and these work. Took most of the slop out of the front end. I rated 3 stars because I'm on my second set. The material is too soft and the screws don't tighten up. Not an issue with the camber links since I just put a longer bolt and a 3mm lock nut. Can't do that with the steering blocks. The shoulder screws keep backing out. And if you have to take them apart to change bearings or something then forget about it. The screws just keep spinning and back out after every run.

Felix, CVerified owneron RPM Caster & Spindle Block Set for Traxxas 4x4

I love RPM parts I got these front and rear on my Rustler 4x4 along with rod ends, body savers and the front rpm bulkhead on mine I prefer these over aluminium anyday

What reviewers say

Reviewers report the caster and spindle block set fits Traxxas 4x4 models and works with Traxxas steel splined axles, with one owner saying it reduced front-end slop. Two reviews mention verified ownership and one praises the set over aluminium alternatives. The main recurring problem, from a single detailed review, is that the shoulder screws back out during runs and do not hold tight, and that the material feels soft; that owner had replaced the set once. Another reviewer says the blocks do not fit MIP driveshafts because the yokes are too large, and that grinding them caused binding. Reviews are few and cover different setups, so the evidence on durability and fitment is limited.

  • + Fits Traxxas 4x4 models
  • + Works with Traxxas steel splined axles
  • + Reduces front-end slop
  • + Preferred over aluminium
  • − Shoulder screws back out
  • − Material feels soft
  • − Does not fit MIP driveshafts
  • − Grinding caused binding
Summary generated from the reviews above.

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