Rear Sway Bar Recommendation for 2017 Thor Motor Coach ACE 30.3

Updated 08/19/2026 | Published 08/12/2026

Question:

Please point me to a beefy rear anti sway bar for my 2017 Thor Motor Coach ACE 30.3 motor home

asked by: Al T

Expert Reply:

Hey Al, the correct beefed up rear sway bar for your 2017 Thor Motor Coach ACE 30.3 is the Roadmaster part # RM-1139-146. This is going to do a great job improving the handling and stability of your motorhome which will make driving it much more enjoyable. How would you describe the handling currently?

expert reply by: Jameson C

Roadmaster Sway Bar
(click to enlarge)

Danny B.

8/19/2026

yes it made it handle better on bad roads and all around but we have a 26 foot so added airbags to

Jameson C.

8/19/2026

@DannyB Glad it's working well for you and thanks for the feedback!

Scott P.

8/19/2026

I added to our Thor Hurricane 32A along with replacement of the front sway bar. This upgrade made a considerable difference in the driving performance of the coach. No longer felt like we were being blown off the road when a semi passed or on high-speed corners. Well worth the upgrade.

Jameson C.

8/19/2026

@ScottP that's great to hear! Glad it's working well for you!

Kurt

8/19/2026

It definitely helped on rough roads, semi passing. I added front and rear.

Jameson C.

8/19/2026

@Kurt that's great to hear!

Dick A.

8/19/2026

I have a 2018 Winnebago Vista LX 30T. I put the anti sway bar on from E trailers a year ago. If the wind is not blowing more than 20 MPH. the Motorhome does not sway very much when a semi truck and trailer pass you on the interstate. It makes driving the Motorhome a lot easier and takes a lot of the stress out of driving it.