two simple questions...

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Feb 27, 2017 | 06:07 PM

KBMWRS

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Cross-Country

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two simple questions...

picked up F-250 gas/SRW

Question 1: Tires...LT275/65 R18 123/120S

Now I know the first part but what does 123/120S mean?

Question 2: Big ol'mirrors with lights in them...white courtesy and an amber light...
I would think that the amber light would flash with my turn signals...they do not. Should they?

Thanks.

Feb 27, 2017 | 06:12 PM

2009kr

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Load rating single/dual. S=112MPH. See a chart for the weights.

Feb 27, 2017 | 07:24 PM

flanneljunkie

Tuned

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From: Alaska

I am pretty certain that the amber lights on the side/front of the mirrors are just marker lights. I may be wrong, but I am going off of the experience with my 2015 F350 mirrors.

Feb 27, 2017 | 08:26 PM

crewzer

Logistics Pro

Joined: Apr 2000

Posts: 4,334

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From: Mills River

Quote:

Question 1: Tires...LT275/65 R18 123/120S. Now I know the first part but what does 123/120S mean?

How to Read Speed Rating, Load Index & Service Descriptions

Quote:

Question 2: Big ol'mirrors with lights in them...

According to OM page 98:

Direction Indicator Mirrors (If Equipped)
While the vehicle is running, the
forward-facing portion of the appropriate
mirror housing blinks when you switch on
the direction indicator.

HTH,
Jim / crewzer

Feb 28, 2017 | 12:36 AM

KBMWRS

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Thank You.

I just thought that ALL vehicles these days HAD turn indicators on the mirrors and since the lights were there....oh well.

Feb 28, 2017 | 06:46 AM

troverman

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Joined: Apr 2013

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From: NH

Quote:

Originally Posted by KBMWRS

Thank You.

I just thought that ALL vehicles these days HAD turn indicators on the mirrors and since the lights were there....oh well.

The 2017 has the turn signal repeaters in the mirrors...but they are only visible from behind. Turn on your 4-way flashers and stand behind your truck...you'll see two amber LED repeaters in the edges of the mirrors blinking. The front amber portions are simply "mirror clearance" lamps and do not blink. The previous generation (2011-2016) and actually the generation before that (2008-2010) had two smaller, non-LED amber lamps. The lower lamp illuminated as the clearance lamp; the upper lamp blinked as a turn signal repeater. It was visible from the front, side, and even certain rear angles. I was disappointed to find the 2017 mirror blinker is not visible from the front.