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Old 03-13-2018, 05:08 PM   #1
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Air Bags, Timbrens or Nothing?

As we prep for our 377 to arrive, Iím considering beefing up the ride on our F-350 SRW with airbags or timbrens. The reviews out there are confusing regarding which is better. We are not full-timers by any means, but will be towing around 7,000 miles/year. Have read that Timbrens are great, but make for a rough ride when not towing, that air bags are the way to go and also that neither are going to make a big difference. What are your thoughts? If we get airbags, an onboard compressor will not be in the cards.
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Old 03-13-2018, 05:28 PM   #2
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Have had Timbrens on our 2015 GMC 3500 SRW for 82,000 mile, about 1/2 of that towing. Highly recommend them. If installed correctly with the gap while unloaded, they have no impact on the ride not towing.
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Old 03-13-2018, 05:33 PM   #3
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I never noticed my timbrens in my 2012 F350
Rough ride? Yes. It’s a one ton truck.
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Old 03-13-2018, 06:30 PM   #4
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Just added timbrens to my 70k mile dually. Gap of about 1” when unloaded. Was surprised how much I could feel them bouncing off the axles even on light bumps in the road. A little annoying. However, large expansion joints taken square no longer send the rear axle flying, so things are more controlled in other respects.

Maybe my shocks are tired.

Taking a 3k mile road trip with the 377 next week, hoping the hiway dips are more controlled now. Lots of squat before.

You may already know, but neither timbrens nor airbags will make up for the rear load capacity deficiency on a SRW with a 377. They may control squat, but you’re pushing the weight limits of your tires.
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Old 03-13-2018, 06:39 PM   #5
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Originally Posted by Lowmiler View Post
Just added timbrens to my 70k mile dually. Gap of about 1Ē when unloaded. Was surprised how much I could feel them bouncing off the axles even on light bumps in the road. A little annoying. However, large expansion joints taken square no longer send the rear axle flying, so things are more controlled in other respects.

Maybe my shocks are tired.

Taking a 3k mile road trip with the 377 next week, hoping the hiway dips are more controlled now. Lots of squat before.

You may already know, but neither timbrens nor airbags will make up for the rear load capacity deficiency on a SRW with a 377. They may control squat, but youíre pushing the weight limits of your tires.


Thanks and yes Iím aware of the payload. DRW is not in the cards right now. Just trying to figure out how to get the best ride...


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Old 03-13-2018, 06:54 PM   #6
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Love my Firestone air bags. No compressor needed. I carry a small hand pump. We run 5 psi empty and 25 psi with the fifth wheel hooked up.

I don’t think you could go wrong with either option.
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Old 03-13-2018, 07:59 PM   #7
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Originally Posted by Redbaron32 View Post
As we prep for our 377 to arrive, Iím considering beefing up the ride on our F-350 SRW with airbags or timbrens. The reviews out there are confusing regarding which is better. We are not full-timers by any means, but will be towing around 7,000 miles/year. Have read that Timbrens are great, but make for a rough ride when not towing, that air bags are the way to go and also that neither are going to make a big difference. What are your thoughts? If we get airbags, an onboard compressor will not be in the cards.


I am waiting for my 377 as well. Putting airbags in my 450. Not because I really need them but the rear will sag and I donít want my headlights pointing up any higher when towing. I get enough people flashing me because they are LEDs. I already had the compressor from my old truck so it was only $120 for the bags.


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Old 03-13-2018, 08:36 PM   #8
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I've had both and prefer the air bags. A good rear sway bar and some Rancho 9000 adjustable shocks will help also.
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Old 03-13-2018, 08:43 PM   #9
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I'm a big fan of the airbags. You can adjust as needed, they eliminate almost all bounce and I've never had mine bottom out. Mine have the internal joust bumps also. With an optional on-board compressor they can be adjusted on the fly depending on road conditions.
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Old 03-13-2018, 08:43 PM   #10
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I have air bags on rear of 350 DWR with 11/2" blocks removed from spring mounts. This lets it set a little low when trailer is hitched. I run around 50lbs air which makes it level and puts some weigh back on front steer axle. When not towing lower pressure to 10lbs for softer ride. Still rides like dump truck but it did that before air bags.
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