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TRP rubber hub end caps. They don't last forever.

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TRP rubber hub end caps. They don't last forever.

Old 10-30-2019, 12:58 PM
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Default TRP rubber hub end caps. They don't last forever.

My trailer is a 2007 with the Tie Down Eliminator axles/spindles.

About 2-3 seasons ago, I had to replace one of the hubs as it burned on the highway and I had replaced it with a nice Kodiak S/S hub. At the same time, I replaced all the cheap, crappy zinc plated hub dust caps with S/S caps and new TRP rubber ends/caps.

I had learned, on here, that not all hub dust caps are created equal and the same with the rubber end caps and my caps would leak the bearing grease out of the rubber cap and all over the wheels. With the new S/S dust caps and quality rubber TRP end caps, no more leaking grease.

I did just have to replace two of the caps as somehow they cracked and let grease out. They don't last forever.

Sturdybilt trailer has these big rubber;plastic caps that go over the entire dust cap but I have not yet found a need for them just yet.
Old 10-30-2019, 02:54 PM
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Mine lasted for years. Perhaps how much grease is pressing against might make a difference. I always left a small air gap. I did recently replace my hubs and went with Vortex hubs. Now it’s a screw on cap.
Old 10-30-2019, 05:21 PM
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I have been getting as much of the grease that is in the dust cap cavity so there is no pressure in that space.

I have no idea how the caps are splitting/cracking.

The caps are cheap at like $1.50 anyway but with shipping, I ended up paying like $20 for four.
Old 10-31-2019, 04:46 AM
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Originally Posted by thundra View Post
I have been getting as much of the grease that is in the dust cap cavity so there is no pressure in that space.

I have no idea how the caps are splitting/cracking.

The caps are cheap at like $1.50 anyway but with shipping, I ended up paying like $20 for four.
Amazon has them free shipping.
Old 10-31-2019, 05:57 AM
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The rubber plugs deteriorate and crack from the suns UV. I had the same issue. Now I use Bearing Buddy bras over the hubs to block UV rays and haven't had to change a rubber plug since, going on 6 years now. The bras come in three different sizes, the 23B fit mine but you will have to measure to make sure.

https://www.etrailer.com/s.aspx?qry=bearing+buddy+bra

I think the ones you mentioned at Sturdy Built are the same thing.
Old 10-31-2019, 06:19 AM
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Originally Posted by jhackl View Post
The rubber plugs deteriorate and crack from the suns UV. I had the same issue. Now I use Bearing Buddy bras over the hubs to block UV rays and haven't had to change a rubber plug since, going on 6 years now. The bras come in three different sizes, the 23B fit mine but you will have to measure to make sure.

https://www.etrailer.com/s.aspx?qry=bearing+buddy+bra

I think the ones you mentioned at Sturdy Built are the same thing.
jhackl is correct, those rubber plugs deteriorate quickly and allow water intrusion. Bearing bras work great at eliminating the early replacement of those rubber plugs and stop water intrusion. My 3500 lbs axles use a #17 Bearing Bra cap.
Old 10-31-2019, 08:18 AM
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I might just have to get some of the bearing bra's as they are only like $1.50 for the correct, snug fitting ones.

I happen to keep my wheels covered anytime the trailer is not being used, the things still crack. Ozone, or just cheap and it happens-kind of thing. I can easily get over it as I have 3 new spares ready to go.

I have gone through many of these caps and have found that the difference in quality/thickness is significant. The TRP molded ones I got are the thickest I've ever found.

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