38x15.50x16.5" Swamper Radial TSL - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 06-21-2012, 04:20 PM Thread Starter
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38x15.50x16.5" Swamper Radial TSL

Hey guys, i just bought some brand new 38x15.50 Radial Tsl's from a guy on craigslist. I got them mounted/balanced on some 16.5x12 Rock Crawler wheels at les schwab. I drove for the first time and i cant get above 35 mph before the truck starts shaking. I took it back and they checked the balance again and added a little weight to them. It made it worse, now i can only go 30 mph before this happens. Any advice? Anyone had this happen? The truck drove great on my toyos before i got these.

1999 F350 SD 7.3l AFE Stage II Intake, Mbrp 4" turbo back straight pipe w/ 6" tip, Edge Juice w/ attitude, 8" lift on 38x15.50 Toyo MT on 18" Motometal rims, '05 Harley Headlights with 12000k HIDs, Foil Delete, Smoked Recon Cab lights, Smoked Taillights and 3rd Brake light

1996 F250 ECLB 7.3l Dana 60 conversion...No engine mods (yet). 6" Tuff Country Lift on 38x14.50 Toyo MT on 16" Mickey Thompson Classics.
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post #2 of 6 Old 06-22-2012, 06:40 AM
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check to see if the tires are out of round, example: you can balance a pencil on your finger but it doesnt roll well, I have the same problem with a set of bfg's that were smooth for the 1st 30k and next thing I know is it bouncing everywhere

06 KR 250
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post #3 of 6 Old 06-22-2012, 06:44 AM
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My experience with swampers is they shake real bad at certain speeds, have you tried powering past the shake?

I agree with ^^^ see if you can find a place to true them up for ya.


-Brian

2003 F-250 6.0L - Lariat King Ranch
-300k+ miles and still strong
Current Mods
-6.5" Pro-Comp lift
-Edge CTS
-SCT X3 (Tuned by Vivian )
-4" Turbo Back Silverline Exhaust, 5"tip
-Blue Spring Mod
-Sinister Coolant Filter
-Oil Cooler
-Sinister EGR Delete
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-6.4 Banjo Bolts?
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post #4 of 6 Old 06-22-2012, 06:44 AM
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if they are out of round and they are nearly new you can have them shaved or trued and then rebalance and be good to go, bad part is you lose alot of tread while shaving them. My guess is if you got a really good deal on them the seller probably already knew the problem.

06 KR 250
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post #5 of 6 Old 06-22-2012, 12:17 PM
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I agree with bwmntbiker.. the thornbirds I had several years ago rode like pure crap at certain speeds. Once you went over or under those speeds the smoothed out and rode nice considering the tires.
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post #6 of 6 Old 06-22-2012, 12:26 PM
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Quote:
Originally Posted by Bluwaterbrew84 View Post
I agree with bwmntbiker.. the thornbirds I had several years ago rode like pure crap at certain speeds. Once you went over or under those speeds the smoothed out and rode nice considering the tires.
Yeah round 50 or so was probably the best ride I got with them. The TSLs I had were bada** in the mud though had them on two different broncos.


-Brian

2003 F-250 6.0L - Lariat King Ranch
-300k+ miles and still strong
Current Mods
-6.5" Pro-Comp lift
-Edge CTS
-SCT X3 (Tuned by Vivian )
-4" Turbo Back Silverline Exhaust, 5"tip
-Blue Spring Mod
-Sinister Coolant Filter
-Oil Cooler
-Sinister EGR Delete
-OEM Cab Lights
Wants/Soon
-ARP Studs
-MTW Stage 1 or Hybrid
-6.4 Banjo Bolts?
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