tire size

[archer379]

Wondering if anyone knows anything on tire sizes if so my boat trailer has a 175 80 13. there is a member with a 180 80 13 for sale. Would this tire be close enough for me to use as a spare?

[Ron]

The 170 - 180 is the height profile. The 70 is a width profile. The 13 is the rim size.

 

As for using it as a spare, shouldn't be a problem so long as you have enough space between the rubber and fender. 180 profile is probably about 1" +- higher than the 170. More importantly is the amount of plys, this will dictate the load and air pressure the tire will accept.

[SlowPoke]

175 80 13

 

175 is the section width in millimeters

80 is the sidewall profile (80% of tread width or 140mm)

13 is rime size in inches.

 

A 180 80 13 tire is 5 mm wider and 4mm taller.

 

If you already had one of these tires as a spare, I wouldn't throw it out but don't spend hard earned money on the wrong tire.

 

**Edited tread width with section width. Section width is actually the widest point of the tire... sidewall to sidewall.

Edited April 25, 2010 by SlowPoke

[Fisherman]

From the tire shop, a 175/80/13 is 24 inches high, a 185/80/13 is 24.7 inches high, so if you needed to use it, your trailer would be .35 inches higher on the one side....Oh my god it's going to tip over....

 

Oh, and I don't think they make 180's they are 185.

Edited April 25, 2010 by Fisherman

[SBCregal]

here is a great tire size calculator. put in the 2 sizes you want to compare and it'll show you the differences.

 

tire size calculator

[Rizzo]

you guys are a wealth of knowledge, gotta love OFC