395/85R20 correct innner tube link.

[volver]

http://www.gemplers.com/product/182084/1000R20-Radial-Approved-Truck-Inner-Tube-TR78A-Valve#TAB-INFO

Is this the correct inner tube for 395/85R20 tires?

 

[gringeltaube]

No way! You would need bigger ones; something like 13.00R20. Didn't see it listed there.


Found this post...


G.

 

[volver]

I don't understand the inner tube sizing system. 10.00R20 what does that mean?

What in the correct size for 395/85R20?

 

[gringeltaube]

10 = 10 inches wide.
.00 = 100% aspect ratio. (which means tire radius minus wheel radius = tire width, more or less)
R = radial
20 = nominal wheel diameter = 20 inches

Correct tube size for 395/85R20 and 15.5/80R20 tires is 13/20 - for radial tires.
I know of people having used 14/20 tubes, also, with no negative reports so far.


G.

 

[volver]

ahh thanks. Would need something like 15.85R20? 15 inches wide, 85% the width tall and, 20 inch rim.

 

[Adxavier06]

So is a 1200/20 tube too small?

 

[volver]

I would say so. If a 1200/20 means: 12 inches wide by 12 inches tall and fits a 20 inch rim. The tube would have to strech 3.5 inches to meet the side walls and strech about 1.5 inches to meet the tread.

 

[Adxavier06]

**** I put 1200/20's in my 395's. I hope they hold up.

 

[volver]

http://www.summitracing.com/parts/crr-322110

The largest I can find readily available and not $200 a piece are 1380R20

 

[volver]

Bauer Tire in Davenport IA has 1200R20 in stock for $35 no shipping charge if I pick them up.

pinzgauer pete posted that his tubes were 11.00/12.00/14.80R20. Others have used 1200R20 with out problems. maybe that is what I will do.

 

[gringeltaube]

That 322110 is for 11.00R20 tires. They have one for 12.00R20's, for the same price: http://www.summitracing.com/parts/crr-322460 Not ideal size but may work OK.
Guess you should shop around a bit. Here is another option, correct size but valve stem is slightly longer: http://www.bruttspecialtytires.com/...-truck-tire-tubes/size-13-00-14-00r-20-2.html.

G.

 

[Adxavier06]

I bought a 1200/20 tubes from Goodyear and paid 32 bucks a tube. The guy there said that tube would work for that size tire, but will see I have only put 50 miles on the 46's so far.

 

[volver]

Nice. tried to put 6 in the shopping cart it informed me that they only have 3 and 3 will be back ordered. Was hoping to have tires installed by next weekend for a camping trip.

I am going to use the 12.00R20 that I have here in town.