wheel size

Joe Grave · Jan 16, 2014

I have a 2004 xlt with the alum wheels thinking about buying some aftermarket wheels same size . I don't want to mess up my speedometer,computer whatever so any suggestion on a place and what size and lug pattern would I need? Thanks Joe g

Eric Toften · Jan 16, 2014

Hey stratosjoe. Here are my three favorite websites regarding tire and wheel sizes. I have never purchased anything and don't promote the websites as retailers. But the tools are fantastic.

http://www.rimsntires.com/tireplussizing.jsp

http://tire-size-conversion.com/tire-size-calculator/

http://www.rimsntires.com/specs.jsp

swshawaii · Jan 17, 2014

16 x 7 Stock Size

5 x 114.3mm (4.5") Lug Pattern

12mm Offset

70.6mm Hub Bore

44mm Backspacing

Yardsale · Jan 17, 2014

The size of the rim does not affect any sensors or computed data; it is the diameter of the tire that does. Both the rim measurements (so they properly fit) and the tire size (to retain ratios) are important.

Igor Smetaniuk · Jan 17, 2014

Good info swshawaii! The Hub Bore should have mm also.

@stratosjoe

You'll open your to a world of choices by getting wheel adapters, otherwise you'll find yourself extremely limited in exact fit offerings. Don't worry so much about the speedometer change because I increased my tire size to 265/70/16 on the stock wheel size (16X7) and my speedo is exactly on mark when tested many times by passing warning radar through towns.

I recommend getting high quality adapters from http://www.wheeladapter.com

Watch the 3rd video that talks about getting Hub centric AND Wheel (Lug) centric adapters so your new wheels sit tightly on a lip. Some people get cheap spacers and place their lives at risk. It'll cost you but your wheels are going to sit rock solid. You'll need to know the bore of your new wheels or you can measure with a caliper gauge.

Keep in mind that the adapters have to be bolted on first to the original studs. Even with the 1 1/2" adapters that I had to get to counter the offset, I needed to grind down the studs on my hubs to make the adapter surface flush for the new wheels to mount on. Don't be surprised if you wind up having to use different size lugs for the new wheels too if the wheel lug pocket is narrower than the big ass lugs our Tracs come with. It was pretty easy to grind and file the studs but time consuming and came as a surprise at 8:00 pm when it was already dark out in my driveway and I needed to be out first thing in the morning. It looked like 4th of July in my driveway and finally finished around 10:30 pm. I first used a 4 1/2" grinder with a cutoff disc, then ground down further to size with regular disc and finished off burs with a standard file to get the lugs (which come with the adapters) just into the pockets of the adapters.

As you can see it's not just a buy and bolt on if you want to get some really nice wheels onto your Trac. Unfortunately, my cheap chrome wheels started pitting/peeling from Northeast road salt and I've been back to using stock wheels. My $300.00 adapters are collecting dust.

Good luck wheel hunting!