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-   Tires, Tires, Tires! (http://www.keystoneforums.com/forums/forumdisplay.php?f=135)
-   -   Tires 3420, wheels 3200, axles 5200 & GVWR 12,300 (http://www.keystoneforums.com/forums/showthread.php?t=34552)

Javi 08-09-2018 02:31 PM

Tires 3420, wheels 3200, axles 5200 & GVWR 12,300
 
What a CLUSTER.. :D

sourdough 08-09-2018 03:38 PM

I'm guessing that's your trailer?:(

Looks like you fell into kind of the slot I did. When I pulled the specs for your trailer (I'm assuming that's the topic) they list the gvw as 12,090, dry weight as 10,330 and tongue of 1760. They pulled that 1760 off the gvw which left them with 10330 and gave you 5200 lb. axles (10,400) to give you that extra "fluff margin".:facepalm: They really went overboard on the tires and wheels; not sure what they were doing putting higher rated tires on the wheels but at least they were trying to give you even MORE margin.:whistling: Of course, I know you already knew that.:D They can definitely make you shake your head....

Javi 08-09-2018 03:40 PM

GVWR is actually 12,350 by the sticker... :D

sourdough 08-09-2018 03:45 PM

Looks like they were just picking out of the wrong parts bin or couldn't read or??? - you should have had bigger axles IMO.

CWtheMan 08-09-2018 06:50 PM

I don't see anything wrong with your numbers. If you deduct 1950# for tongue weight from the GVWR you get two 5200# axles. You would have to overload your axles for the tires to overload the wheels.

Everything meets minimum building standards.

rhagfo 08-09-2018 07:00 PM

Yep, same here put a good set of LT tires on it and don’t worry about tires for about six years!

sourdough 08-09-2018 07:50 PM

Quote:

Originally Posted by CWtheMan (Post 301427)
I don't see anything wrong with your numbers. If you deduct 1950# for tongue weight from the GVWR you get two 5200# axles. You would have to overload your axles for the tires to overload the wheels.

Everything meets minimum building standards.


1950 tongue weight? Explain.....

rhagfo 08-09-2018 08:45 PM

Quote:

Originally Posted by sourdough (Post 301447)
1950 tongue weight? Explain.....

12,350 - 10,400 = 1,950
Not likely that at full GVWR the pin weight would only be 1,950# as that is only about 16% would need to be 20% to 25%, 2,470# to 3,088#.

Javi 08-10-2018 02:38 AM

Quote:

Originally Posted by CWtheMan (Post 301427)
I don't see anything wrong with your numbers. If you deduct 1950# for tongue weight from the GVWR you get two 5200# axles. You would have to overload your axles for the tires to overload the wheels.

Everything meets minimum building standards.

Never said it didn't... still, as someone who makes his living designing mechanical things... not how I'd want to do it...

Actual pin weight is closer to 2900 than 1900 because everything that holds weight in this trailer is in front of the axles.. only the fresh water tank is behind..

Like said above... don't need 3420 tires... since the wheels are only 3200... and really... even 3200 is overkill since the axles are the weak link at 5200..

Like I said... a CLUSTER :whistling:

Javi 08-10-2018 04:33 AM

So, technically I could use these for tires.. Defender LTX M/S - Size: LT245/75R16 120/116 3042 lbs. They are roughly (30.4") the same diameter and width as the OEM

Still 884 lbs. more than the axle limit 3042 x 2 = 6084


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