K20/K30 bolt patterns

[Buck69]

Does the K20 and K30(single axel) share the same wheel nut pattern in '86? Looking to pick up a 2wd K20 as a parts truck for some little stuff. Hoping I can use the front hubs/spindles to build a trailer axel, but would like for them to share common spare tires. If not, will wait it out for another single K30. Thanks in advance!

 

[AyWoSch Motors]

Does the K20 and K30(single axel) share the same wheel nut pattern in '86? Looking to pick up a 2wd K20 as a parts truck for some little stuff. Hoping I can use the front hubs/spindles to build a trailer axel, but would like for them to share common spare tires. If not, will wait it out for another single K30. Thanks in advance!

Same exact wheel bolt pattern, youll be fine, no worries at all. They're both 8x6.5.

Any chevy or GMC c20, c30, k20, k30, c25, c35, k25, k35, c2500, c3500, k2500, k3500, up to about mid 2010s i think are all the 8x6.5 standard. Also older ford 3/4 and 1 ton up to mid to late 90s, older dodge up to mid to late 90s, as well as IH and studebaker, and most if not all trailers are all the same too.
Was only as of late that chevy went to metric style 8 lug, ford and dodge went metric late 90s I think.

Some newer aftermarket wheel inner hole dont clear the big full float rear axle hubs and/or 4x4 front hubs. Most do though.
Any stock Chevy wheel will fit no problem though.

 

[Buck69]

Great, thanks and interesting. Maybe my '08 2500 will fit as well then? Thought centers might be smaller but honestly didn't compare side by side. May toss one of the summers in the back and try it on the project D30 this weekend.

 

[AyWoSch Motors]

Great, thanks and interesting. Maybe my '08 2500 will fit as well then? Thought centers might be smaller but honestly didn't compare side by side. May toss one of the summers in the back and try it on the project D30 this weekend.

You're welcome..

They should fit it too.

 

[PrairieDrifter]

Great, thanks and interesting. Maybe my '08 2500 will fit as well then? Thought centers might be smaller but honestly didn't compare side by side. May toss one of the summers in the back and try it on the project D30 this weekend.

That's the thing that will bite you, the center bore on old 6 lugs are smaller than the same bolt pattern on new wheels. I can't speak for an 8 lug though.

 

[Buck69]

You're welcome..

They should fit it too.

They are all 16's as well, so that will be handy.
Will be mounting 37's for the '86 and it's trailer. That won't be much good for the '08, but it is the daily driver.

 

[AyWoSch Motors]

They are all 16's as well, so that will be handy.
Will be mounting 37's for the '86 and it's trailer. That won't be much good for the '08, but it is the daily driver.

They should all be 16in. Newer ones that are 17 or bigger are the new metric ones, and I'm not sure they ever made 15in 8 lugs, probabaly don't fit the brakes.

 

[bucket]

There are and were 15" 8-lug wheels, aftermarket of course. They clear the big rear brakes on a FF rear axle. The 1-ton front calipers need a fair amount of material shaved off for the wheels to fit though. The amount needed depends on the specific wheel being used.

 

[AyWoSch Motors]

There are and were 15" 8-lug wheels, aftermarket of course. They clear the big rear brakes on a FF rear axle. The 1-ton front calipers need a fair amount of material shaved off for the wheels to fit though. The amount needed depends on the specific wheel being used.

Never knew that, interesting. Never seen a 15in 8 lug. Cool

 

[bucket]

Never knew that, interesting. Never seen a 15in 8 lug. Cool

I ran a pair on the back of my C20 Suburban for a while.

You must be registered for see images attach

The camo '77 also has a set. The PO had to do a bunch of grinding on the front calipers for them to fit. It's a D60. I'd assume the same would be needed for a C30 with the larger calipers. The rear has [front] calipers and rotors for a K20 and they fit fine.

You must be registered for see images attach

 

[Grit dog]

Same exact wheel bolt pattern, youll be fine, no worries at all. They're both 8x6.5.

Any chevy or GMC c20, c30, k20, k30, c25, c35, k25, k35, c2500, c3500, k2500, k3500, up to about mid 2010s i think are all the 8x6.5 standard. Also older ford 3/4 and 1 ton up to mid to late 90s, older dodge up to mid to late 90s, as well as IH and studebaker, and most if not all trailers are all the same too.
Was only as of late that chevy went to metric style 8 lug, ford and dodge went metric late 90s I think.

Some newer aftermarket wheel inner hole dont clear the big full float rear axle hubs and/or 4x4 front hubs. Most do though.
Any stock Chevy wheel will fit no problem though.

Close. But a bit off on the years. And all the dually models of each brand now have a larger pattern than the srw trucks.
This link below is a good resource.
FWIW, Ram 2500/3500 srw trucks are still 8x6.5 up thru current models.
Makes for a good election of new or newer 8 lug takeoff wheels for all the older trucks. Since Frod and GM ditched the 8x6.5 pattern in 1999 and 2011 respectively.

Bolt Pattern Chart

TRUCK YEAR BOLT CIRCLE STUD THREAD Chevy / GMC 1/2-ton Pickup 67-Current 6X5.5 M14 x 1.5 Chevy / GMC 3/4-ton Pickup 65-10 8X6.5 M14 x 1.5 Chevy / GMC 1-ton Pickup 77-10 8X6.5 M14 x 1.5 Chevy / GMC 3/4-ton Pickup 11-Current 8X180mm M14 x 1.5 Chevy / GMC 1-Ton Pickup (Single Wheel) 11-Current...

buytruckwheels.com

 

[RanchWelder]

Never mind, long day...

 

[RanchWelder]

.

 

[SquareRoot]

I'm seriously considering Vison Manx wheels. I'm coming up needing new tires soon and I really want 17 inch wheels. I like the look, fit and price of these 8 lug wheels.

 

[Grit dog]

Swapping to 16" tires for the 10 ply advantage, means upgrading the wheel lugs to 14mm (or at least 1/2"), so the un sprung weight can be managed safely for highway driving... drill like you own it... be safe. The acorn's will bottom out and ruin your wheels if you try to use small size lugs on the larger 6 lug wheels, at 16". Your tires must match size for 4WD to work correctly, without breaking SH it.

I don’t understand what you’re saying here.
Aside from the discussion being about 8 lug wheels K20/30, I don’t understand what you’re talking about drilling out and small and big 6 lug.