DwnSth
SE Louisiana
Senior Member
Joined: 03/04/2008
View Profile
Good Sam RV Club Member
|
Currently have Sumitomo 275/70R22.5 which matches the coaches original tire spec. Getting ready to replace but having hard time finding the Sumo's. Looking at Toyo and they do not seem to have the 275's. My shop suggested going to the 295/75R22.5's but I'm concerned about going to the slightly larger tire. Any thoughts or suggestions would be appreciated.
2014 Berkshire 360QL
|
Blaster Man
USA
Senior Member
Joined: 08/01/2007
View Profile
 Offline
|
Plug the numbers for the two tires in here, it will detail the differences:
https://tiresize.com/comparison/
2014 American Eagle
|
ScottG
Bothell Wa.
Senior Member
Joined: 02/25/2005
View Profile
|
You and possibly the rigs ECM are going to hate what that change does to your gearing. That's more than a 10% change in gearing.
I made a similar change with an "embellished" diesel truck and it still sucked.
|
4x4van
California
Senior Member
Joined: 02/19/2010
View Profile
Offline
|
Are you sure you don't have the numbers mixed up? 275/75 and 295/70 are almost the exact same size.
We don't stop playing because we grow old...We grow old because we stop playing!
2004 Itasca Sunrise M-30W
Carson enclosed ATV Trailer
-'85 ATC250R, '12 Husky TE310, '20 CanAm X3 X rs Turbo RR
Zieman Jetski Trailer
-'96 GTi, '96 Waveblaster II
|
keepingthelightson
Santa Clarita, Ca
Senior Member
Joined: 02/15/2005
View Profile
Good Sam RV Club Member
|
I changed over to the 295's. The height is very close to the 275's with a slightly wider foot print. The 295's are easier to find as well. Lots of trucks are running this size now.
Good luck
05 Tiffin Phaeton 40 QDH w/4 slides
CAT C7 350+ HP MP-8, Aero Muffler, AFE Filter
06 HHR LT Toad
Ready Brute Elite
|
|
|
ferndaleflyer
everywhere
Senior Member
Joined: 03/31/2011
View Profile
Offline
|
I got Hankooks---easy to find and the right size.
|
ScottG
Bothell Wa.
Senior Member
Joined: 02/25/2005
View Profile
|
4x4van wrote:Are you sure you don't have the numbers mixed up? 275/75 and 295/70 are almost the exact same size.
You might read his post again, he stated 275/70 & 295/75. That's about an inch difference in sidewall height.
|
haddy1
Chesterfield, MO
Senior Member
Joined: 11/19/2009
View Profile
Good Sam RV Club Member
Offline
|
Pretty sure that the OPs coach is on a FL chassis. Probably came with 275/80r/22.5 tires.
2019 Tiffin Phaeton 37BH
2018 Grand Cherokee Toad
|
DwnSth
SE Louisiana
Senior Member
Joined: 03/04/2008
View Profile
Good Sam RV Club Member
|
It's a Freightliner XCR chassis. The build sticker with vin and weights shoes the 275/70R22.5 which is what the current sumitomos are.
|
Bruce Brown
Northern NY
Moderator
Joined: 06/01/2001
View Profile
Good Sam RV Club Member
|
We went from 275/70s to 11R-22.5s.
The 11Rs are the same height as the 295s, slightly skinnier so they fit our rims. 295s were too wide.
In our case I always felt we were over geared for the 275s, it just turned too many RPM at highway speeds.
With the 11Rs it's just about perfect. There hasn't been any downside - none.
Next year we'll be looking at tires again (age) and we'll definitely be doing the 11Rs again.
All that said, what engine/transmission combo are you running and what is your highway speeds RPM?
What we did may not be the best choice for you.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910
|
|
|
