Thread Tools Display Modes
Old 04-29-2019, 02:05 PM   #1
Join Date: Jun 2016
Posts: 48
XLR 340AMP with FlexAir Pinbox

I have the 340amp (max weight 16500) and I'm looking at upgrading the Pin Box to a Flex Air. I checked with the dealer, who then checked with Forest River and they stated to make sure and use the 21k lb and not the 18k lb. I of course asked why and they stated that as with the Flex Air the trailer tows differently it requires the 21k.

Does anyone have any experience with this as to why?

taylorjw0831 is offline   Reply With Quote
Old 05-04-2019, 05:18 PM   #2
Senior Member
Tim Coltrain's Avatar
Join Date: Jun 2016
Location: Winterville, NC
Posts: 204
Pin Box

I installed the Flex Air on my camper as well. I was never told about the 18,000 vs the 21,000. I would have went with the 21,000 just because I always rather have a little more than less. I love mine not troubles at all. Your cost should be in the range of $800 or so. I instaled mine myself. I also installed Air Lift on truck as well. No looking back on my part. When I loaded my camper like I was going to dry dock. With fuel, LP, Water, Food, and stuff you need I was maxed right to the number. I've got a 2018 Duramax and with camper weighed right at 25,300 pound. My camper was right at 15,000. So going with the 21,000 Trail Air will not be a bad choice. Camp on my friend.
Tim & Rita Coltrain
2012 Chevrolet 2500 Duramax Crew Cab, Allison Tranny Has now been replaced by a NEW 2018 LP5 Duramax 2500 Allison Tranny.
XLR Thunderbolt 2016
Tim Coltrain is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -5. The time now is 03:52 AM.