Some advice on a Chevy Suspension Upgrade

[booster]

Here is a link to a pickup with the wider wheels mentioned above. These are either the even more rare chrome plated version, or they have wheelskins on them.


https://minneapolis.craigslist.org/a...687470709.html


The key to identifying them is the 6 openings with scallops in between them. They will be 16X7, +28 mm offset steel wheels.

[cruising7388]

Originally Posted by booster

Here is a link to a pickup with the wider wheels mentioned above. These are either the even more rare chrome plated version, or they have wheelskins on them.


https://minneapolis.craigslist.org/a...687470709.html


The key to identifying them is the 6 openings with scallops in between them. They will be 16X7, +28 mm offset steel wheels.

This wheel offering is damaged but is it the correct model you are referring to?

https://www.ebay.com/itm/16-INCH-06-...ry!94970!US!-1

[booster]

Yep, that is also a chrome one.


Here is a listing for the steel one.


https://www.ebay.com/itm/16-GMC-SIER...0AAOSwLxpbiPog


If you scroll down to the information section there will be an interchange number you can search for. 560-05198


You can also search the factory part numbers by looking at a place like GM Parts Direct for a 2008 Silverado 2500HD. The also still show new wheels available for $200 each, which isn't all that bad with how high the used ones are getting.

[cruising7388]

Originally Posted by booster

Yep, that is also a chrome one.


Here is a listing for the steel one.


https://www.ebay.com/itm/16-GMC-SIER...0AAOSwLxpbiPog


If you scroll down to the information section there will be an interchange number you can search for. 560-05198


You can also search the factory part numbers by looking at a place like GM Parts Direct for a 2008 Silverado 2500HD. The also still show new wheels available for $200 each, which isn't all that bad with how high the used ones are getting.

Is the width increase 1/2 inch?

What benefits accrue from this investment, i.e. what tire size and load rating does this permit and does it still clear the wheel wells when turning?

[booster]

Originally Posted by cruising7388

Is the width increase 1/2 inch?

What benefits accrue from this investment, i.e. what tire size and load rating does this permit and does it still clear the wheel wells when turning?

Yep, wheel width increases only 1/2 inch. What that does is get you into the recommended range of wheel width so you can use a 265-75-16 tire instead of a 245-75-16 tire. The load capacity of the larger tire is something like 350# higher, so you gain 700# tire capacity on the rear axle. The smaller rear axle is rated the same as the smaller tires, but they always do that for consistency, it appears. The bigger, full floating, axle that comes with the towing package has over 1000# more capacity than the stock tires.


Personally, I don't like running any tires right at or very near capacity, so that extra 700# gives us a lot more window.


The bigger tires do clear the wheelwells on both ends, being the closest to hitting at the front spoiler lip on ours.


The investment wasn't as big a deal for us because we needed to get wheels to correct the offset anyway, and were getting near due on tires also. We did recoup some of the cost by selling the old tires and wheels.

[cruising7388]

Originally Posted by booster

Yep, wheel width increases only 1/2 inch. What that does is get you into the recommended range of wheel width so you can use a 265-75-16 tire instead of a 245-75-16 tire. The load capacity of the larger tire is something like 350# higher, so you gain 700# tire capacity on the rear axle. The smaller rear axle is rated the same as the smaller tires, but they always do that for consistency, it appears. The bigger, full floating, axle that comes with the towing package has over 1000# more capacity than the stock tires.


Personally, I don't like running any tires right at or very near capacity, so that extra 700# gives us a lot more window.


The bigger tires do clear the wheelwells on both ends, being the closest to hitting at the front spoiler lip on ours.


The investment wasn't as big a deal for us because we needed to get wheels to correct the offset anyway, and were getting near due on tires also. We did recoup some of the cost by selling the old tires and wheels.

Doesn't going to the 265 provide about 1.2 inches more clearance to ground which would be welcome indeed? Or is it just half that amount?

Are there different part numbers for the chrome plate and painted wheels?

[Hondo]

17 inch Silverado / Sierra wheels are also an option...I use them on my Roadtrek with BFG T/A KO2 Radials.


Tech info-

Chevrolet Silverado 2500 2001-2010
Chevrolet Silverado 3500 SRW 2007-2010
Chevrolet Suburban 2500 2000-2013
GMC Sierra 2500 2001-2010
GMC Sierra 3500 SRW 2007-2010
GMC Yukon 2500 2000-2013

Product Specifications:

Material: Aluminum
Style: 5 Spoke
Finish: Silver Machined
Size: 17x7.5
Lugs: 8
Bolt Pattern: 6.5 Inch
Offset: 28mm
Option Code: P25
Indents: 9595858, 19152820
OE Part Number: 9595464


The tires-

265-70R-17 - 31.7"" currently mounted





Go here to compare tire sizes -


https://tiresize.com/calculator/


A set of steel wheels for $200 in Denver -


https://denver.craigslist.org/pts/d/...683646726.html

[booster]

Originally Posted by cruising7388

Doesn't going to the 265 provide about 1.2 inches more clearance to ground which would be welcome indeed? Or is it just half that amount?

Are there different part numbers for the chrome plate and painted wheels?

It is half the amount. Tire brands also vary a bit between them for diameter, but right around .5" of extra ground clearance.

[booster]

Originally Posted by Hondo

17 inch Silverado / Sierra wheels are also an option...I use them on my Roadtrek with BFG T/A KO2 Radials.


Tech info-

Chevrolet Silverado 2500 2001-2010
Chevrolet Silverado 3500 SRW 2007-2010
Chevrolet Suburban 2500 2000-2013
GMC Sierra 2500 2001-2010
GMC Sierra 3500 SRW 2007-2010
GMC Yukon 2500 2000-2013

Product Specifications:

Material: Aluminum
Style: 5 Spoke
Finish: Silver Machined
Size: 17x7.5
Lugs: 8
Bolt Pattern: 6.5 Inch
Offset: 28mm
Option Code: P25
Indents: 9595858, 19152820
OE Part Number: 9595464


The tires-

265-70R-17 - 31.7"" currently mounted





Go here to compare tire sizes -


https://tiresize.com/calculator/


A set of steel wheels for $200 in Denver -


https://denver.craigslist.org/pts/d/...683646726.html

The 17" wheels are nice, but you don't get as much load capacity increase with 17" 70 series tires. If you aren't worried about the load capacity, they are a good option.

[cruising7388]

Originally Posted by booster

It is half the amount. Tire brands also vary a bit between them for diameter, but right around .5" of extra ground clearance.

Isn't the change in tire diameter going to introduce some error into the factory speed readout that will read slower than actual speed but would not introduce any error in my Garmin GPS 770 speed indication?

I haven't tangled with wheels before so it's new to me. It's critical to get it right because even if the vendor accepts returns on wheels you pay for, the return freight would be prohibitive. Apparently, 560-05198 is an "interchange" part number, whatever that is, but it isn't a valid GM part number. In going to GM Parts Direct, there's not just one wheel but three wheels with different prices that are seemingly compatible with the 2008 2500HD Silverado but there is no explanation I could see that illustrates the differences between them:

9595396

9595221

9596525

[booster]

Originally Posted by cruising7388

I guess that the change in tire diameter is going to introduce some error into you seed readout.

I haven't tangled with wheels before so it's new to me. Apparently, the 560-05198 is an "interchange" part number, whatever that is, but it isn't a GM part number. In going to GM direct, there's not just one wheel but three with different prices that are compatible with the 2008 2500HD but there is no explanation I could see that describes the differences:

9595396 This is the 6.5" wide wheel with 5 openings just like stock van.

9595221 This is the 7.0" wide steel wheel that is OEM same as 05198 interchange number

9596525 This is the same as the 5221 wheel above but in chrome OEM

See above, best way to tell is to do Google search for images.

[Deano]

According to my GPS, at an indicated 63 MPH I am going 65 on 265/75 tires.

This information from RT may clarify information about the aluminum wheels RT used, at least on my 2005 RT 210.

"The wheels in question are not actually American Racing wheels, they are a Prime Wheel style #108. The American Racing center caps were used because they looked better than the Prime center caps. According to the Prime website the 108 has been discontinued. Attached is a scan of the pamphlet that came with the wheels originally.
Prime Wheel"

[cruising7388]

Originally Posted by Deano

According to my GPS, at an indicated 63 MPH I am going 65 on 265/75 tires.

The speedometer says 63 and the GPS says 65?

[cruising7388]

Originally Posted by booster

See above, best way to tell is to do Google search for images.

Do you know if the tire pressure sensors currently in the aluminum wheels for our 2017 210PC can be fitted properly in and reliably report from the Silverado steel wheels?

[Deano]

Yes, that is correct.

[booster]

Originally Posted by cruising7388

The speedometer says 63 and the GPS says 65?

Yep, the speedo will read low by about 2mph at that speed. Ours is nearly exactly the same as Deano says. The speedo used to read a bit high before the change, so it actually moved more than the 2 mph. I have a 4% odometer correction in the Scangauge to get the odometer correct.



I checked with GM and they don't have a speedo flash for the vans in that tire size to correct the speedo. I think I could do it with HP Tuner I got to program the tranmission, but for 2 mph it isn't worth the effort.

[alaskasail]

What shocks and springs do you choose?

[booster]

Originally Posted by alaskasail

What shocks and springs do you choose?

Moog 81004 front springs


Airlift rear airbags with internal bump stop for rear


Bilstein shocks all four corners.


Here is a link to a recent discussion and successful implementation of these parts on a Roadtrek 210 Chevy.


http://www.classbforum.com/forums/f8...t210-7561.html


There are several other threads with more information and detail that can be found by searching if this isn't enough information, as this has been discussed and done quite a few times now.

[Hondo]

Originally Posted by booster

The 17" wheels are nice, but you don't get as much load capacity increase with 17" 70 series tires. If you aren't worried about the load capacity, they are a good option.

I don't think anyone here is going to exceed the load capacity of the 17 inch tires much less the 16 inch tires unless they are in a 210 and upgrade the suspensions/rear axle/4 wd conversion (ie increase the dry weight of the vehicle) or massively overload it.

The 70s tires won't carry the load of the 78s in every size, but it's the specific tire that I chose in the 70 series that can handle it.

Load limits do have to be monitored and the tires chosen able to handle the actual and foreseen loads placed upon them. A stock class B won't have any issue with tires rated for 3,085 or 3,195 lbs each (which is more than most 16 inch tires mounted at the factory.)


The steel wheels are just one option available. There are also aftermarket wheels available with close-to factory offset rated at 3,600 lbs in 16,17 & 18 inch sizes. For those wanting an easy solution with the stock tire size then the steel wheels are a good choice because of fitment and strength.

[cruising7388]

Originally Posted by Hondo

I don't think anyone here is going to exceed the load capacity of the 17 inch tires much less the 16 inch tires unless they are in a 210 and upgrade the suspensions/rear axle/4 wd conversion (ie increase the dry weight of the vehicle) or massively overload it.

The steel wheels are just one option available. There are also aftermarket wheels available with close-to factory offset rated at 3,600 lbs in 16,17 & 18 inch sizes. For those wanting an easy solution with the stock tire size then the steel wheels are a good choice because of fitment and strength.

You suggest that it's unlikely that stock 210s are running over their load limits. I think it's just the opposite - unlike the 190, I think that at least sometimes, most of us 210 owners are probably running with the rear tires overloaded.

Two 265-75-16 tires will handle a total of 740 pounds more than the 245-75-16 tire. That's not chopped liver. Of course the trade off is that while the difference in tire cost is not very much, the necessity for using pricey 7 inch wide rims to properly mount them brings the total cost of the tire change up considerably.

But in any event, dumping the badly designed AR rims provided by Roadtrek is a worthy objective. Selecting the aluminum wheel option without fully investigating their offset specifications was one of my less than brilliant decisions. The icing on the cake is that you can't even properly store an AR aluminum wheel in their Continental tire kit which was apparently designed for steel wheels.