PDRS209 is an X-MAXX aluminum control horn/DS630BLHV servo package. Also available with the more powerful DS930BLHV and DS1155BLHV servos.

Price: $169.99

    Item #: PDRS209-630
    Availability: Discontinued notify me

    This is the ProModeler control arm/servo package for replacing the stock arm/servo in your X-MAXX when using the Traxxas #7749 servo adapter that replaces the stock unit with a 630oz-in brushless high voltage all-alloy steel gear train high performance servo.

    The arm is part of a servo-package. Both it and the servo are CNC-machined from a solid billet of 6061-T6 aircraft aluminum. The arm is anodized red (there are loads of YouTube videos showing the oven cleaner method of removing the color of anodized aluminum). The servo is one of our very powerful standard size brushless servos modified to fit an X-MAXX - ProModeler brushless DS630BLHV servo - click the link for details (this opens in a new tab). However, to save time; these are the highlights . . . 630oz-in, billet aluminum case, brushless motor, steel gears, bronze hard points, 13 o-rings, plus it meets:

    MIL-STD-810G-Part 16

    • Shock - Test Method 516.6
    • Vibration - Test Method 514.6
    • Rain - Test Method 514.5

    If you find a better servo, buy it. Tell us so we can improve ours.

    Pro Tip: in common with any servo in this class (+600oz-in), the DS630BLHV needs as much as 5A of current (not while loafing, but when it's working hard). At 7.4V this works out to a bit more than 35W (the case isn't finned for decoration, it gets hot) and at 8.4V this goes over 40W. The point is, either use a BEC with enough cojones to do the job, or opt for a separate 2S LiPo (like a nitro rig because even an ordinary 30C 2S1000mAH LiPo will output 30A).

    This begs the question; which is better, a BEC or a 2S LiPo? Honestly, it comes down to a bit of grade school math, and whether you value convenience over performance. We prefer batteries because their output isn't garbage and noise - but - everybody makes their own decisions. Honestly, we don't care because the servo will run on either source. Further info to help you decide which is best for you.

    As for a BEC, we offer a 20A unit from Castle Creations CC BEC Pro 20.

    Final note; your DS630BLHV servo is supplied with the 'beam mod' where part of the beam closest to the output shaft is removed. This is so it fits within the Traxxas adapter.

    Last thing; if you'd rather not have a servo with the beam mod, just mention it in the notes when you order - but also note; this service is built into the package pricing (meaning they're on the shelf and while we don't mind swapping out the servo for one that's unmodified before shipping, we're not also going to take time to go into the computer and adjust the price of the order). Don't like it? We're sorry, it's the way it is.

    Pro Tip: Control horns will strip out when they come loose of the splined output shaft. Not much we can do about that because it's on you to ensure the nuts and bolts on your model stay tight. Thus, you'll be wise to either use a chemical means to help secure it (thread locker - blue, not red), or a mechanical aid, like with a star washer, or lock washer, etc. This, in addition to performing routine preventive maintenance on your rig, like checking the security of the important fasteners. Also it's worth trying to see how long a bolt will actually thread into your servo (they're all a little different) and if you can use one that's a little longer than the one we supply, then use a longer one to get more thread engagement.

      The following photo sequence compares and contrasts two servos that are popular in the XMAXX, the SAVOX SB-2290SG and ProModeler DS630BLHV.

      - SAVOX SB-2290SG vs ProModeler DS630BLHV -

      Last thing; if you'd still rather have the SAVOX SB-2290SG, kindly do us the favor of sharing your thought process with John at 407-302-3361 please because we are eager to learn more about the X-MAXX market.

      Overall Customer Rating of 4 Reviews:
      Los Angeles

      Best X-MAXX upgrade!


      So I upgraded my X-MAXX to all metal arm, steering, chassis brace, MAX6 etc. the #1 issue I had was servo problems. Went through three 2085x with the metal gears. Then I came across the DS630BLHV page. Extremely fast shipping and I installed it same day. Then I put it through test that my previous servo couldn't handle and it made it through every one. This thing is a tank!! Now I can keep all my metal upgrades!! I will be buying at least 1 more just to have in case they sell out! Wish I could give it more stars! And i wish you guys were on eBay because I would have found you all sooner! Lol

      Thank you!


      Promodeler Xmaxx servo horn

      • Direct replacement
      • Excellent service
      • Fast shipping
      • None

      I am very impressed with the ProModeler servo horn for my Traxxas X-MAXX because it's a great direct replacement for the original servo horn when adapting to a standard-size servo. And it looks great, too. Shipping was super fast and I wouldn't hesitate to use ProModeler products again in the future. Thank you for the excellent service provided, I give you 5 stars!

      Very satisfied


      Good product.

      New York

      Steering servo horn for my xmaxx

      • Quality of this product is top-notch
      • I have no cons about this thing yet
      I am completely happy with the construction of this steering. Warren and I love how you can use the stock bearings. Overall it is a great product.