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Tire Question

Birken Vogt

Charter Member
Joined
Nov 30, 2003
Messages
5,305
Location
Grass Valley, Ca
Of the Chinese brands, Double Coin seems to be pretty mainstream nowadays.

We ran caps where I worked and had them capped in Oliver Waste Hauler Lug. Big knobby mud tires and they worked great in mud and in snow they were almost like having chains on a regular tire.

I had capped as many Double Coin as I did Toyo and American brands and never had one pop. We would run steers out and cap 3 times over before junking.
 

Truck Shop

Senior Member
Joined
Dec 7, 2015
Messages
16,548
Location
WWW.
We run DC 400 drive tires-average 170,000 on a set. We bought all the Double Coins we could because there is a tariff that's been enacted and you won't be able
to get them, by the info I was told.

Truck Shop
 

tireman

Senior Member
Joined
Apr 19, 2011
Messages
264
Location
St.Louis,Mo.
You need 10R22.5's (the actual equivalent to 9.00-20)on 22.5 X 7.50 wheels. Probably have a 22.5 X 8.25 wheel right now. Put the right thing on there and it'll fit without spacers or offset or any other unnecessary contraptions. You put a bigger tire and wheel on there than what you had is why you have a problem.
 
Last edited:

Marrowthirst

New Member
Joined
Jan 19, 2017
Messages
2
Location
Tucson
Using a 8.25 rim instead of 7.5

You need 10R22.5's (the actual equivalent to 9.00-20)on 22.5 X 7.50 wheels. Probably have a 22.5 X 8.25 wheel right now. Put the right thing on there and it'll fit without spacers or offset or any other unnecessary contraptions. You put a bigger tire and wheel on there than what you had is why you have a problem.

Tireman, I read your post and you seem very knowledgeable. I am a simple novice wanting to be pointed in the right direction. I have a 1976 Loadstar 4x4 with Dayton rims and 9.00x20 tires - it was an Army truck before I owned it. I have the same situation as the other person above with 9.00x20 rotted tires and I want to go tubeless. Based on what you have said I should change my rim to 22.5 x 7.5. That size rim is hard to find from all the places I looked at or called around. It seems 22.5 x 8.25 is the more common rim. I can buy new Accuride rims 22.5 x 7.5 but I will have to pay a lot more than new or used 8.25 rims. Am I right in reading I would have troubles (like the poster above did) by using 8.25 vs the 7.5 rim? If I did go with the 8.25 wouldn't I need to go with a different spacer also?

Another forum on the subject by someone named ModMechwrote this: The 10R22.5 tire will mount well on either a 7.5" or 8.25" Drop Center Dayton rims. There are two VERY important reason to buy the 8.25" rims: 1) They are MUCH cheaper than the 7.5" rims, and 2) You can mount 11R22.5 tires on the 8.25" rims but NOT on the 7.5" ones (safely). The 11R22.5 tires cost about 10% more, but are actually worth MONEY used and tread life is about 100% improved (same tire brand and model).

But, if I am reading things correctly I should stay away from 8.25 because my loadstar was designed for the 7.5 wide wheel and I cannot incorporate the 8.25 wheel without compromising something.

I appreciate your advice on steering me to a wiser decision. While I would like to use an 8.25 wide rim for the reasons noted above I just am not sure that will work for me. Thanks in advance for you help.
 

tireman

Senior Member
Joined
Apr 19, 2011
Messages
264
Location
St.Louis,Mo.
First of all you can safely mount 11's on a 7.5 wheel(8.25 is recommended/7.5 is approved(exactly opposite for 10's - 7.5 recommended, 8.25 approved). The 8.25 is cheaper because it is the more common size. The tread life statement made by the novice is asinine. 11R22.5's are worth more in any condition because they are more common and carry more weight.
As for your vehicle, all I can tell you is fit them up & check clearances. Optimally 10's on 7.5's is best but if 8.25's clear you may save some $ on wheels. You won't need to change spacers just because of wheel width. The spacer relates to the wedges and hub width, not wheel width.
 

Willie B

Senior Member
Joined
Jan 2, 2016
Messages
4,039
Location
Mount Tabor VT
Occupation
Electrician
If your truck is X military, I bet it has some insanely tall gear ratio. Taller tires would be a small step in the right direction. If your wheels are good, I bought 10.00 X 20 Double Coin traction tread for my 1976 Chevy. They are a great tire! My local dealer handles Double Coin, but told me they weren't available in my size. A dealer in Maine had them in two days.

Willie
 

Marrowthirst

New Member
Joined
Jan 19, 2017
Messages
2
Location
Tucson
Thanks for the quick reply.

Good information for me and very helpful to know the spacer on the dually is not a factor due to the rim width. I plan to do the measurements to see what my truck can safely accommodate.

Also, I checked on a Double Coin dealer and learned there is one in Tucson so I will check them out.

The information here will help me make the most economical and safe choice...I appreciate all the knowledge you guys have and willingness to help out.
 

tireman

Senior Member
Joined
Apr 19, 2011
Messages
264
Location
St.Louis,Mo.
Glad to help. Best of luck & keep us posted on your progress. I'm never on the Forum anymore unless I get an email notification to checkout so if you start a new thread shoot me a message.
 

Steeldriver

Member
Joined
Oct 30, 2017
Messages
17
Location
US
this is a old thread, might be dead, but split rims and converting to 22.5s.

i got 9r20s, i know the conversion is 7.5x22.5

7.5x22.5 is not very common any more. and the 10r22.5 went extinct with covid. ran into this with f650 and had to hack my truck bed to get a tire on the rear. more then likely will go to a 295 or 11r tire. this is a gas truck so smaller tires/ more torque is better.

will the 7.5 interchange with the 8.25 daytons? i have read the front might need a 1/2 inch spacer and the rear spacer is different to fit. been years since i have messed with 1 of these. i prefer tubes and split rims for the work i do, but these wheels are not in good condition and cant get replacements. using the truck to haul rock, putting between 7 and 12 yards of wet rock on this single axle pushing 35k to 60k. i know 295s tubeless wont take that abuse, especially offload digging bedrock out of pond. i load my 650 with 295s up to 44k with 10rs and wont go past 36k with the 295s, same ply tire just 1 was made better then the other.

thanks in advance.
 

Willie B

Senior Member
Joined
Jan 2, 2016
Messages
4,039
Location
Mount Tabor VT
Occupation
Electrician
With the 1976 C65 I used to own, I went years putting used tires & NOS tires bought from the local farm store. Old tires, regardless if they have zero miles don't last. The set of 4 I put on rear were cracked 2 months after being installed. They had been stored in the attic where temperature ranged from zero to 130, might have been 30 years old.

I was in Maine, had a flat on the camper, the guy at the 1 man tire store seemed knowledgeable. I asked about 10:00-20 16 ply traction tread. He said "I can have them here tomorrow." I bought a set in Maine & hauled them 450 miles home. Double Coin, a Chinese tire, I believe still on the truck 12 years old.
 

MG84

Senior Member
Joined
Jan 6, 2023
Messages
643
Location
Virginia
If you are loading a single axle class 6 truck to 60k you are going to have way bigger problems than tire size....
 
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