Wanderlodge Owners Group  
BuyByeBlueBird.com
Donate

Go Back   Wanderlodge Owners Group > Mechanic's Corner > Tires, Wheels, Brakes, Steering and Suspensions

Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

Site Search:
Reply
 
Thread Tools
  #1  
Old 08-22-2016
Birdman9096 Birdman9096 is offline
Senior Member
 
Join Date: Nov 2015
Location: Tampa
Posts: 411
Default Max load for Tire

Hey gang,
I have a question about the four rear tires for my 85FC-35. Just saw some cracks and some rubber coming apart Between the tread. I'm in a hurry to change them out before my trip this weekend. I'm just going to replace the ones I have with same brand. The tires on the bus are Dunlops. I know there are probably better tires out there, but I'm going with these for now. The model I'm looking at is the Dunlop SP348's. They are position/Steer, 16 ply, H rated, 75mph, load/speed 143L. My question is about the max Loads. Dual rating is 6005@ 120psi and single is 6610 @120psi. Tire guy say that he will have them in the morning. Question: I just need to know if these tires are capable of carrying the weight for this bus? Thanks
__________________

Kent & Pearl Glover
1985 FC-35RB "Wild and Wanderful"
Tampa, Fl
(813) 454-6347
Email: juballer22@gmail.com
Reply With Quote
  #2  
Old 08-22-2016
Bill Pape's Avatar
Bill Pape Bill Pape is online now
Administrator
 
Join Date: Jan 2008
Location: Commerce
Posts: 11,423
Default

I am not familiar with Dunlap tires, but how old are the tires you are replacing,
rubber coming apart between the tread ??
__________________
Bill & Patty
1988 FC, Silver Edition
Commerce, Michigan
Reply With Quote
  #3  
Old 08-22-2016
Birdman9096 Birdman9096 is offline
Senior Member
 
Join Date: Nov 2015
Location: Tampa
Posts: 411
Default

Quote:
Originally Posted by Bill Pape View Post
I am not familiar with Dunlap tires, but how old are the tires you are replacing,
rubber coming apart between the tread ??
I'm not sure. The PO told me that they were put on in 2009. I was finally able to find one tire that was stamped with S-3706 -2. So, I'm assuming that could signify the 36th week of 2006. If so, they are long over due!
__________________

Kent & Pearl Glover
1985 FC-35RB "Wild and Wanderful"
Tampa, Fl
(813) 454-6347
Email: juballer22@gmail.com
Reply With Quote
  #4  
Old 08-22-2016
Flyfisher Flyfisher is offline
Senior Member
 
Join Date: Mar 2016
Location: Beverly Hills
Posts: 544
Default

Kent,

I had a set of the Dunlop SP-348 tires installed all around this past March, they are a good tire and American made. They are a regional steer tire though, meaning Dunlop did not intend to be used on the drive or tag axles. You can search the internet and find a variety of opinions on this subject. Using steer tires in drive positions is not uncommon even though the tire manufacturer suggests otherwise.

As to your question about the load, you should have each axles weighed and use the Goodyear load inflation tables to determine the proper inflation for each tire location. The load rating you stated is the max load rating at the maximum inflation pressure from Dunlop SP-348 tire specs. Using that data your maximum drive axle load is 4 x 6005 = 24,020 lbs @ 120 psi and the steering axle is 2 x 6610 = 1,220 ,lbs @ 120 psi, combined axle loads being 37,240 lbs. Does your bus weigh more or less than that? If your bus axle weights are less, use the load inflation tables for the correct tire size to reduce the inflation pressure based on your axle loads.

I run 12R22.5s and can carry more load and using the inflation tables my tag and drive axles are at 90 psi and the steering at 110 psi, which is different than what Blue Bird specified for my bus. You shouldn't have any problem though, you just need to know your axle loads.
__________________


Andy & Jean Harmon
Dakota (our Aussie traveling buddy)
Beverly Hills, FL
1996 WB42 (SOLD)
Reply With Quote
  #5  
Old 08-22-2016
MRPutz's Avatar
MRPutz MRPutz is offline
Burnin Up in Az. :-)
 
Join Date: Apr 2008
Location: Mesa
Posts: 4,104
Default

Quote:
Originally Posted by Birdman9096 View Post
Hey gang,
I have a question about the four rear tires for my 85FC-35. Just saw some cracks and some rubber coming apart Between the tread. I'm in a hurry to change them out before my trip this weekend. I'm just going to replace the ones I have with same brand. The tires on the bus are Dunlops. I know there are probably better tires out there, but I'm going with these for now. The model I'm looking at is the Dunlop SP348's. They are position/Steer, 16 ply, H rated, 75mph, load/speed 143L. My question is about the max Loads. Dual rating is 6005@ 120psi and single is 6610 @120psi. Tire guy say that he will have them in the morning. Question: I just need to know if these tires are capable of carrying the weight for this bus? Thanks
Since you already made up your mind and tires are on the way.. then the answer is "Yes".

Personally I wouldn't let a trip pressure me into a 7 year commitment. I also don't like 120 PSI rated tires. Most compressors won't even fill them. I would have done more research and found all position 105-110 PSI rated tires myself.
__________________
Michael & Tami Putz
78FC35SB & 83FC35SB Wanderlodge - "Putz'n Around"
'90 GL1500 Goldwing | '67 VW Rail | '82 CJ5 Jeep
eMail=Mike.Putz@cox.net | Web=http://mikeputz.com/
Solar = https://www.solarpenny.com/SearchResults.asp?Cat=257

FMCA #236459, Good Sam #17270530, Vintage Birds #1509
Reply With Quote
  #6  
Old 08-22-2016
Birdman9096 Birdman9096 is offline
Senior Member
 
Join Date: Nov 2015
Location: Tampa
Posts: 411
Default

Quote:
Originally Posted by Flyfisher View Post
Kent,

I had a set of the Dunlop SP-348 tires installed all around this past March, they are a good tire and American made. They are a regional steer tire though, meaning Dunlop did not intend to be used on the drive or tag axles. You can search the internet and find a variety of opinions on this subject. Using steer tires in drive positions is not uncommon even though the tire manufacturer suggests otherwise.

As to your question about the load, you should have each axles weighed and use the Goodyear load inflation tables to determine the proper inflation for each tire location. The load rating you stated is the max load rating at the maximum inflation pressure from Dunlop SP-348 tire specs. Using that data your maximum drive axle load is 4 x 6005 = 24,020 lbs @ 120 psi and the steering axle is 2 x 6610 = 1,220 ,lbs @ 120 psi, combined axle loads being 37,240 lbs. Does your bus weigh more or less than that? If your bus axle weights are less, use the load inflation tables for the correct tire size to reduce the inflation pressure based on your axle loads.

I run 12R22.5s and can carry more load and using the inflation tables my tag and drive axles are at 90 psi and the steering at 110 psi, which is different than what Blue Bird specified for my bus. You shouldn't have any problem though, you just need to know your axle loads.
Andy,
The manufacturer stated that they were an All position/steer tire now. I'm going to stay with the 11R-22's, because those were the factory specs for my bird. The recommended tire pressure for the rear tires are 110psi. Will that make a difference in any way? The Dunlops drove fine since I've had the bus and I think they are at least 10 years old. My owner's manual says that my bus overall weight is around 28,000. I really appreciate you taking the time to help me out. Thanks again.
__________________

Kent & Pearl Glover
1985 FC-35RB "Wild and Wanderful"
Tampa, Fl
(813) 454-6347
Email: juballer22@gmail.com
Reply With Quote
  #7  
Old 08-22-2016
Birdman9096 Birdman9096 is offline
Senior Member
 
Join Date: Nov 2015
Location: Tampa
Posts: 411
Default

Quote:
Originally Posted by rtpn60 View Post
Since you already made up your mind and tires are on the way.. then the answer is "Yes".

Personally I wouldn't let a trip pressure me into a 7 year commitment. I also don't like 120 PSI rated tires. Most compressors won't even fill them. I would have done more research and found all position 105-110 PSI rated tires myself.
I haven't given him any money yet. Is there a particular brand tire you would recommend. I still have 3 days before I leave, I'm sure this guy can get them if he wants to make a sale. I'm open to suggestions. Thanks.
__________________

Kent & Pearl Glover
1985 FC-35RB "Wild and Wanderful"
Tampa, Fl
(813) 454-6347
Email: juballer22@gmail.com
Reply With Quote
  #8  
Old 08-22-2016
susanmarycamilleri's Avatar
susanmarycamilleri susanmarycamilleri is offline
Senior Member
 
Join Date: Jan 2008
Location: vancouver Is.
Posts: 1,686
Default

When I had my FC I liked to run "H" load rated tires especially on the front. I felt that the "G" rated were too close to the margin for the weight of the coach. Just my opinion.
So I would be happy with the tires you are considering. I ran the cheapest tire that was recommended to me by a local tire shop. One of the great things about the 11R22.5s is that they are not that expensive.
__________________
Peter Haggins
Courtenay, BC
Canada
96wb42
Mid Door
Reply With Quote
  #9  
Old 08-22-2016
MRPutz's Avatar
MRPutz MRPutz is offline
Burnin Up in Az. :-)
 
Join Date: Apr 2008
Location: Mesa
Posts: 4,104
Default

Quote:
Originally Posted by Birdman9096 View Post
I haven't given him any money yet. Is there a particular brand tire you would recommend. I still have 3 days before I leave, I'm sure this guy can get them if he wants to make a sale. I'm open to suggestions. Thanks.
Kent, I wouldn't get into a Ford vs Chevy argument on which tires are the best. Personally, I was an AMC fan.


BUT, as I stated I stay away from 120 PSI tires especially since you don't need them. As you stated I'd stick with the 11R22.5's too. My '78 comes in at 28,000 pounds so I'd check your axle weights again. I'd also only buy all position tires (which "steers" usually are). You didn't indicate a price, but these are all good tires; Toyo, Yoko, Hankook, BF Goodrich, Kumo's, etc.. so I'd look for a bang-4-buck.

I'm running Toyo's on my rear and BF Goodrich on my fronts. I typically run the same brand all around and will again soon as my tires are coming up on 6 years old now. I was experimenting with low profile tires in the rear for gear reduction purposes.

Just an FYI on some research I've already done;

Toyo M154 $366 Load-G 14ply 105psi 6,173 max load
Yoko 101ZL $372 Load-G 14ply 105psi 6,175 max load

If you find your front axle is over/near 12,000 pounds then go for 16 ply. I'm going to check out the BF Goodrich's next with the Michelin tire purchase program we have. :-)
__________________
Michael & Tami Putz
78FC35SB & 83FC35SB Wanderlodge - "Putz'n Around"
'90 GL1500 Goldwing | '67 VW Rail | '82 CJ5 Jeep
eMail=Mike.Putz@cox.net | Web=http://mikeputz.com/
Solar = https://www.solarpenny.com/SearchResults.asp?Cat=257

FMCA #236459, Good Sam #17270530, Vintage Birds #1509
Reply With Quote
  #10  
Old 08-22-2016
Birdman9096 Birdman9096 is offline
Senior Member
 
Join Date: Nov 2015
Location: Tampa
Posts: 411
Default

Quote:
Originally Posted by rtpn60 View Post
Kent, I wouldn't get into a Ford vs Chevy argument on which tires are the best. Personally, I was an AMC fan.


BUT, as I stated I stay away from 120 PSI tires especially since you don't need them. As you stated I'd stick with the 11R22.5's too. My '78 comes in at 28,000 pounds so I'd check your axle weights again.

If you find your front axle is over/near 12,000 pounds then go for 16 ply. I'm going to check out the BF Goodrich's next with the Michelin tire purchase program we have. :-)
Mike,
I checked again.
Chassis GVWR 34,000
Front axle 13,200
Rear axle 23,000
__________________

Kent & Pearl Glover
1985 FC-35RB "Wild and Wanderful"
Tampa, Fl
(813) 454-6347
Email: juballer22@gmail.com
Reply With Quote
Reply

Bookmarks

Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
up-load pic's help! 78bbird Under The Awning 10 06-12-2015 06:37 PM
SNIDER TIRE (Michelin Tire Service Provider at the Annual WOG Rally) iamflagman Vendors 0 10-23-2011 03:03 AM
Tire Saftey and Tire Bead Leaks, Punctures Christian Tires, Wheels, Brakes, Steering and Suspensions 5 04-23-2011 11:45 PM
Talk About a Load Off... KD Roberts Full Timers 8 04-07-2011 08:09 AM
Tire cover for a 12R22.5 tire warbucks13477 Vehicle Issues 15 10-01-2009 04:44 PM

Web Search:

All times are GMT -4. The time now is 01:51 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.