Traxxas Suspension King Pin Rustler 2.5 X 31.5 TRA3740 View larger

Traxxas Suspension King Pin Rustler 2.5 X 31.5 TRA3740


Free Super Saver Shipping on Most Orders of $99* or More

Limited Time Offer - As a thank you for your patronage we are offering free shipping on most orders over $99*, within the 48 contiguous United State (exclusions shown below).

Orders using our free super saver shipping option may take up to 10 business days for delivery as the most cost effective shipping method will be used. Canceling items, changing your shipping address and/or shipping method, or combining orders may affect your cart's free shipping eligibility. Be sure to click on the free shipping option at check out to take advantage of this great offer. If you have any questions concerning this offer please call 866-787-5487 or email

Free Super Saver Shipping is not available on international orders - valid only on orders shipping within the 48 contiguous United States.

Items ineligible for free shipping include (but may not be limited to):

  • - Redcat Racing
  • - Oversize
  • - Hazardous
  • - Fragile Items that Require Special Handling

Eligible items will display this icon:

*Before taxes and fees.

Economy Shipping - only $2.99 to $5.99

Are you tired of paying more for shipping than the price of the part?

Light weight, small packages qualify for our Economy Shipping rates. While these orders are processed within our regular timeline this option is not a premium shipping method and due to stock allocation and shipping service they may take 3-10 business days to be delivered.

Applies to U.S. delivery addresses in the 50 states only, including Alaska and Hawaii. Geographic shipping restrictions may apply to particular products; for example, some tools and hardware items may not be shipped to Alaska and Hawaii using Economy Shipping, applies to APO/FPO addresses when using a United States ZIP Code only.

Please Note: Canceling items, combining orders, or changing your shipping address, speed, or preference might affect your order's eligibility for Economy Shipping.

We reserve the right to change or discontinue Economy Shipping and/or Free Shipping at any time.

Shipping Surcharge

Shipping surcharges will be incurred when the total shipping weight of the cart exceeds 20lbs.

Ground Shipping Items

Some RC Planet's products can only be transported under ORM-D (Other Regulated Materials for Domestic transport). Shipping under ORM-D means that the product will ship via FedEx Ground only, and cannot be shipped outside of the US. These products include:

  • Non-Water Based Paint and Paint Thinner
  • Petroleum-Based Oil
  • Aerosol Type Products
  • Traction Compounds
  • Tire and Body Cleaners
  • Epoxy / Accelerators / Debonder

The US Postal Service will not transport ORM-D items, and will not show up as a delivery option during checkout.


For All Shipments: Special labeling requirements are needed to safely transport any Lithium products. Certain large Lithium Batteries will always require HazMat handling and will only ship via Fedex. If you would like to know more about FedEx and the safety precautions taken when transporting Lithium Batteries, please refer to the FedEx guidelines.

International Shipments: Lithium Batteries are regulated as HAZMAT (Hazardous Material) products and can be dangerous if not packaged properly for transportation. In smaller quantities, Lithium Batteries can be shipped via DHL without applying a HAZMAT fee. If you'd like to ship more than 2 Lithium Batteries, a HAZMAT fee will be applied for transportation. Please note that DHL only allows transportation of HAZMAT / Dangerous Goods to specific countries, some of which have limited service areas.

The US Postal Service prohibits international mailing of Lithium Batteries, as well as electronic devices that contain Lithium Batteries. These new regulations also prohibit shipments to or from Army, Fleet, and Diplomatic Post Offices. Because of these regulations, no US Postal Service shipping options will be available during checkout.

Domestic Shipments: Both FedEx and the US Postal Service are available as shipping carriers for most Lithium Batteries and electronic devices containing Lithium Batteries. Please note that the US Postal Service has a limit of three batteries per shipment; you can refer to the Domestic Mail Manual for further information.


Fuel is classified as a "flammable" liquid. RC Planet can transport limited quantities of flammable liquid under ORM-D (Other Regulated Materials for Domestic transport). Shipping under ORM-D means that the product will ship via FedEx Ground only. For larger quantities of fuel (Example: case quantities), it must be transported under HAZMAT. Transporting as HAZMAT means that the amount of fuel is considered hazardous and will be subject to shipping by Ground services, including a HAZMAT fee for the special transportation. Fuel cannot ship outside of the US.

Please note that the US Postal Service does not transport Fuel and will not show up as a delivery option during checkout.

Rocket Motors

Rocket Motors, Rocket Igniters and Rockets are classified as “Toy Propellant Devices” and can only be transported through Surface Mail with the US Postal Service’s Parcel Post. FedEx does not transport Rocket Motors, Rocket Igniters and Rockets. Please note that FedEx will not show up as a delivery option during checkout.

International Shipping Restriction


Due to circumstances and regulations that are beyond RC Planet's control, batteries cannot ship outside of the US when using the United States Postal Service as the shipping provider. However, RC Planet can ship batteries internationally using DHL International, but the quantity cannot exceed a total of 2 batteries with a capacity of 5000mah maximum. Unfortunately we are currently unable to ship this item to APO/FPO addresses and apologize for the inconvenience.


Due to distributor restrictions, the following brands are not available for sale outside of the 50 United States: Losi, Team Losi Racing, Blade, ParkZone, ECX, Hobby Zone, E-Flite, Vaterra, Dynamite, Pro Boat, Spektrum, JR Radio, Orion, and Hangar 9.

5/5 - 6 reviews



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Traxxas 2.5x31.5mm pins with E-clips are made of stainless steel. This is used to hold the front steering block to the castor block on the electric (not Nitro) Rustler, also called the vertical kingpin.

2 Pins (kingpins)
4 2.5mm e-clips


Fact sheet

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Reviews (6)

"Fred Wendel"

"Quick delivery at a reasonable price"

"Parts showed up in the mail without mistakes within days of order at a fair price.I will continue to shop RC Planet when parts are needed."

"Angel "


"NECESSARY. if you buy a traxas monster jam, order a set of these. the car is very powerful and you will jump with it.when you jump hard with it these might bend, i recommend everyone to get a spare set to replace in case they break."

"D. S."

"Monster Mutt parts"

"Exactly what I needed to fix my monster truck. Price was good and shipping was quick."

"Kent Taylor"

"Great product, excellant service"

"Product was shipped quickly."

"Jerry Porter"

"Great Parts"

"Again, I like your service, and the speed of shipping."

"Joe "

"Excellent Customer Service!"

"Slight website issue caused a part that was not in stock appear to be in stock. After working with RC Planet Sales, everything was sorted out with ease. Great sales and customer service. Thanks!"

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