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Alternative Shock O-rings

HeavyBag

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Tekno RC's
ET410
I thought you all were crazy when you said your shocks leaked. I don't know that I read anything on this forum, but other interweb chatter had people scratching their heads. Then it happened about a month ago to me. Rebuilt the shocks with stock x-rings, and within one battery pack worth of laps, shocks were leaking ...what the heck :unsure:.

I heard of people using Axial o-rings with great success, but all the online sources were out of them. I turned to HPI's 3.5x2mm offering.

Now that I have another set of shock seals to compare, I totally understand what's going on. The stock x-rings will almost slide down the shock shafts just with gravity alone. The HPI o-rings grab the shock shafts much more securely for a better seal. So far, so good (y)(y). No more leaks coming from the bottom of the shocks.
 
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HeavyBag

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Tekno RC's
ET410
Oh, but I do use "slime" to lube o-rings/x-rings. If grease does the sealing, then there wouldn't be a need for rubber rings. There is only so much grease will do. Only purpose for lubing the rings is to prevent tear from possible sharp edge of shock shaft threads. After the grease has done its job; it's time for the rubber to do its job...grab hold of the shaft, and seal.


The new set of x-rings was a fail. The originals in the ET410 kit did fine for months. I'm chalking the experience up as a bad batch of rubber.
 

Billl DeLong

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Tekno RC's
EB410, EB48, ET48, SCT410, ET410
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Racer
could be a bad batch of rubber or a torn seal possibly... I am still on the original set of rubber seals on my 9 year old SCT410.1 and they have never leaked, I simply apply fresh grease every 2-3 race days and they remain as good as new.

I don't own the ET410 anymore, but never had any problems with those seals either with over a year of use on that truck before I sold it to try another brand.
 

HeavyBag

Well-known member
Messages
63
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Tekno RC's
ET410
could be a bad batch of rubber or a torn seal possibly... I am still on the original set of rubber seals on my 9 year old SCT410.1 and they have never leaked, I simply apply fresh grease every 2-3 race days and they remain as good as new.

I don't own the ET410 anymore, but never had any problems with those seals either with over a year of use on that truck before I sold it to try another brand.
That's what I'm talking about. I always said the same thing to other people with leaky ET410 shocks. Now it seems at least once a week someone is showing up on FB with same issue. Meh 🤷‍♂️. HPI and me are great at the moment.
 

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