RV.Net Open Roads Forum: Class C Motorhomes: Lift

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Class C Motorhomes


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Sponsored By:
bobndot

USA

Senior Member

Joined: 08/21/2007

View Profile


Offline
Posted: 10/11/20 11:29am Link  |  Quote  |  Print  |  Notify Moderator

memtb wrote:

pnichols wrote:

The best way to lift everything (suspension, transmission, engine, shock mounts, etc.) higher is by installing taller tires.

I did this on our Class C years ago to provide more clearance when we occasionally go on dirt/gravel backroads. Our Class C's chassis is the Ford E450, so it has plenty of extra fender tire well room for tires that our larger in diameter than what came stock on it.


pnichols, has “nailed it”! The chassis/frame/body are generally the contact points on irregular terrain.....the only way to address all of these is taller tires!

Awaiting my newish ( on unit when we purchased) tires to wear out or “date expire”.....will be going taller, for sure! memtb


What tire size ?
Will you need to adjust the speedometer ?
Will they fit the wheels already on the truck ?
You will need to upgrade the spare too.

7 tires and maybe wheels ? How much height is the expected gain ?

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 10/11/20 11:36am Link  |  Quote  |  Print  |  Notify Moderator

I would go to a place that does 4WD conversions for a class C. This is really a comprehensive engineering project to get it right.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

pnichols

The Other California

Senior Member

Joined: 04/26/2005

View Profile



Good Sam RV Club Member


Posted: 10/11/20 04:43pm Link  |  Quote  |  Print  |  Notify Moderator

bobndot wrote:

memtb wrote:

pnichols wrote:

The best way to lift everything (suspension, transmission, engine, shock mounts, etc.) higher is by installing taller tires.

I did this on our Class C years ago to provide more clearance when we occasionally go on dirt/gravel backroads. Our Class C's chassis is the Ford E450, so it has plenty of extra fender tire well room for tires that our larger in diameter than what came stock on it.


pnichols, has “nailed it”! The chassis/frame/body are generally the contact points on irregular terrain.....the only way to address all of these is taller tires!

Awaiting my newish ( on unit when we purchased) tires to wear out or “date expire”.....will be going taller, for sure! memtb


What tire size ?
Will you need to adjust the speedometer ?
Will they fit the wheels already on the truck ?
You will need to upgrade the spare too.

7 tires and maybe wheels ? How much height is the expected gain ?


On Ford E350 and E450 based Class C motorhomes, it's real simple to go to larger diameter tires: Our E450 Class C came with 225/75R16E tires. By just changing out to 215/85R16E tires I was able to increase ground clearance by 0.6 inches (the 215's tire diameter was 1.2 inches larger), keep the stock rims, and keep the same rated tire loads and pressures. The speedometer reads about 1.2 MPH slower, but this is of no concern. I didn't want to go to any larger diameter tires so as to keep the step-up into the cab from being much higher.

Some Class C owners posting in the forums change to 235/75R16E tires to gain even more ground clearance without changing rims or losing load capability. I'm not absolutely sure, but maybe even 245/75R16E tires could be fitted onto the Ford E350 and E450 chassis to really gain ground clearance without rim, loading, or pressure changes.

Probably speedometer error can be corrected by Ford dealers or 3rd party ECU tuning equipment suppliers, if one is concerned with speedometer errors.


Phil, 2005 E450 Itasca Spirit 24V

pnichols

The Other California

Senior Member

Joined: 04/26/2005

View Profile



Good Sam RV Club Member


Posted: 10/11/20 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

memtb wrote:

pnichols wrote:

The best way to lift everything (suspension, transmission, engine, shock mounts, etc.) higher is by installing taller tires.

I did this on our Class C years ago to provide more clearance when we occasionally go on dirt/gravel backroads. Our Class C's chassis is the Ford E450, so it has plenty of extra fender tire well room for tires that our larger in diameter than what came stock on it.


pnichols, has “nailed it”! The chassis/frame/body are generally the contact points on irregular terrain.....the only way to address all of these is taller tires!

Awaiting my newish ( on unit when we purchased) tires to wear out or “date expire”.....will be going taller, for sure! memtb


Yep ... taller tires provide more clearance for everything in one swoop ... a very simple way to do it ... assuming wheel wells provide the clearance and assuming that the front suspension allows it with no rubbing on full lock turning! Another plus in raising ground clearance this way is that it keeps raising of the vehicle's center of gravity to a minimum - which is always good for several reasons.

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile


Offline
Posted: 10/11/20 07:36pm Link  |  Quote  |  Print  |  Notify Moderator

Cheapest and easiest. Add a leaf or two and maybe a spacer block. New spring bolts required.

Mkewley

Idaho

New Member

Joined: 10/10/2020

View Profile


Offline
Posted: 10/12/20 11:40am Link  |  Quote  |  Print  |  Notify Moderator

Not trying to off road it. Just some of the gravel roads have a few places that the rear end gets really close to the ground and just would like a few more inches. Not about to put a whole suspension lift.

Hank85713

Tucson, Az

Senior Member

Joined: 05/04/2006

View Profile





Offline
Posted: 10/12/20 12:12pm Link  |  Quote  |  Print  |  Notify Moderator

caution, tires need to be able to flex WITHOUT rubbing each other. 19.5's would probably require special wheels to allow and then would cause potential issues with the fender walls. Same thing could be true with larger 16's, I dont know if the new duallys have 17 or 18 inch wheels but maybe you can check and see fitment?

Check with someplace like ARROW wheels they would be a good source for information.

bobndot

USA

Senior Member

Joined: 08/21/2007

View Profile


Offline
Posted: 10/12/20 01:24pm Link  |  Quote  |  Print  |  Notify Moderator

Pnichols, thank you for the tire info. The scan gauge or gps can be used as a speedometer.

happy-2

calif

Senior Member

Joined: 11/27/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 10/16/20 12:12am Link  |  Quote  |  Print  |  Notify Moderator

I have a 2002 winnebago 30 ft.i found my air bags lifted the rear of my rig 4 in enough to back up into my side yard with a tow bar staying attached.i run the bags at 100#..just enough clearance.

Gjac

Milford, CT

Senior Member

Joined: 08/16/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 10/16/20 04:57am Link  |  Quote  |  Print  |  Notify Moderator

pnichols wrote:

bobndot wrote:

memtb wrote:

pnichols wrote:

The best way to lift everything (suspension, transmission, engine, shock mounts, etc.) higher is by installing taller tires.

I did this on our Class C years ago to provide more clearance when we occasionally go on dirt/gravel backroads. Our Class C's chassis is the Ford E450, so it has plenty of extra fender tire well room for tires that our larger in diameter than what came stock on it.


pnichols, has “nailed it”! The chassis/frame/body are generally the contact points on irregular terrain.....the only way to address all of these is taller tires!

Awaiting my newish ( on unit when we purchased) tires to wear out or “date expire”.....will be going taller, for sure! memtb


What tire size ?
Will you need to adjust the speedometer ?
Will they fit the wheels already on the truck ?
You will need to upgrade the spare too.

7 tires and maybe wheels ? How much height is the expected gain ?


On Ford E350 and E450 based Class C motorhomes, it's real simple to go to larger diameter tires: Our E450 Class C came with 225/75R16E tires. By just changing out to 215/85R16E tires I was able to increase ground clearance by 0.6 inches (the 215's tire diameter was 1.2 inches larger), keep the stock rims, and keep the same rated tire loads and pressures. The speedometer reads about 1.2 MPH slower, but this is of no concern. I didn't want to go to any larger diameter tires so as to keep the step-up into the cab from being much higher.

Some Class C owners posting in the forums change to 235/75R16E tires to gain even more ground clearance without changing rims or losing load capability. I'm not absolutely sure, but maybe even 245/75R16E tires could be fitted onto the Ford E350 and E450 chassis to really gain ground clearance without rim, loading, or pressure changes.

Probably speedometer error can be corrected by Ford dealers or 3rd party ECU tuning equipment suppliers, if one is concerned with speedometer errors.
Phil, did you notice any increase in your MPG with larger dia tires?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Search:   Advanced Search

Search only in Class C Motorhomes


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.