6x5.5 / 6x139.7 to 5x4.75 US Wheel Adapters 1/2x20 stud 1.75" thick 90mm Bore x2
Part # = USA-6550-5475D4-90
Vehicle Bolt Pattern = 6x5.5 / 6x139.7
Wheel Bolt Pattern = 5x120.7 / 5x4.75
Adapter Center Bore = 90mm
Adapter Lug Seat = Conical (do not use factory bolts with Radius seat)
Adapter Studs = 1/2x20
Open Ended Lug Nuts Included same size as Adapter Studs
Thickness = 1.75"
Quantity = 2
Pictures are NOT exact - item is described above.
NOTICE!! This is a built to order item listed as No Return.
If you buy the wrong item for whatever reason, you wreck your car, your wheels get stolen, someone told you the wrong measurement, bought 2 thinking it was 4, found a better price...Whatever it is still NO Return. We are professionals are are willing to help you get the right item BEFORE you purchase but you need to contact us First.
Need something a little different like Studs, Thickness, or Center Bore? We are the Manufacturer, just ask and we can make a listing for you.
If you have any questions, please message us and get the answers before your purchase.
It is your responsibility to ensure that the written description which includes the bolt pattern of the vehicle, bolt pattern of the wheel, center bore and stud / lug nut size are all correct for your application.
If you are not sure about anything please ask.
We are available with professional advice.
8-4 PST Mon - Thur 8-3 Fri
Installation is of critical importance with wheel adapters.
Professional installation is strongly recommended.
Slip fit the adapter on the wheel and the vehicle before you bolt anything on to ensure that you have proper fitment.
Installed adapters are not returnable.
Mating surfaces must be clean and free of rust and obstructions allowing for the adapter to sit flat on the rotor, and the wheel flat on the face of the adapter.
Make Sure the lug nuts or studs from the vehicle do not touch the back of the wheel.
Torque by hand, do not use impact gun for installation.
Improper Installation Voids All Warranties.
The bolt pattern of the vehicle comes first in the listing and the wheel bolt pattern is listed after the word "to".
3, 5 and 7 lug bolt patterns measure differently than 4, 6, or 8 lug
NEVER rely on the stamp on the wheel for bolt pattern, it is Wrong more than right.
If the studs on your vehicle are longer than the adapter is thick, you may need to trim them down so they do not touch the back of the wheel.
Factory lug nuts are often too big to recess in an adapter so they may need to be replaced.
Studs / Lug Nuts
These wheel adapters require a conical seat lug nut or bolt.
One set of open ended conical seat bulge lug nuts are included with the adapters in the same size as the studs in the adapter unless otherwise requested or advertised above.
Different wheels require different kinds of lug nuts, make sure you get the proper lug nuts for your wheels in the right size to fit the studs in the adapter.
The center hole of the adapter must be large enough to fit over the hub of the vehicle. It can be larger, which is called lug centric, where the conical seat lug nuts center the adapter on the hub.
Hubcentric refers to an adapter where the center hole of the adapter perfectly fits over the hub sticking out on the vehicle.
Wheel centric is available for extra cost in most applications for the person that wants the best and closest to factory fit that you can get, or you want extra strength, then wheel centric is optional.
If you have wheels that require a radius seat lug nut, it is strongly recommended.
The pictures are of stock adapters and may not look exactly like what you get due to differences in bolt patterns and center bore sizes.
You will receive the item as described in the written description of the listing.
Our prices are higher than many other sellers because they are usually cheap, inferior wheel adapters made in China.
We are a US manufacturer based in San Bernardino California where we use US sourced billet aluminum providing the best materials for construction of our wheel adapters.
The US sourced aluminum that we use for construction is superior and more costly than that from China and it costs more for labor in the US which is why our wheel adapters cost more.
Beware of unscrupulous sellers of wheel adapters (there are many) who would imply or even straight up lie by saying that their adapters are US-made, but they're Chinese imports, these are truly US-made wheel adapters made by US citizens from US sourced aluminum in our machine shop in San Bernardino California
WarrantyImproper Installation or alteration Voids All Warranties.
We offer a limited lifetime warranty on our US-made wheel adapters.
This warranty covers the aluminum construction of the adapter, if it should ever fail we will replace the defective part.
This warranty is limited to part replacement only, user agrees to assume all other responsibility and or liability arising from use of this product.
Wheel studs are a wear part, and are replaceable in the adapter, there are many ways to damage them that have nothing to do with construction so wheel studs are not covered under this warranty, if you need stud replacements we have them available for sale online.
Please Contact us with ANY questions Before purchase, we can no longer display our phone number in our listings but there is a "contact seller" link at the top right of this page in the box called Seller Information where you can contact us through the message system or find the phone number.
Thank You And Have a Blessed Day