Front wheel center bore too big issue...what to do? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72freak · 01-16-2011, 07:40 AM

Ive searched for a thread I have read but I cant find it. As we all know the front drums on all these 6 lug trucks require such a large "center bore" on the rims we are limited on the wheels we can run. Im not interested at this time in doing a major running gear conversion but I have seen threads on milling the wheels OR changing the front brake drums and bearings over to those from a 6 lug car or van. I have read the thread but I cant find it.

I really want to run some 17, 18, or 20's in a 6 lug Torq Thrust style rim.

Thread links, ideas or help would be appreciated.

**Captainfab** · 01-17-2011, 12:58 AM

It has been my understanding that most if not all aftermarket wheels had a center bore large enough to fit the hubs on these older trucks. I could be wrong though on some of the newer larger diameter wheels. I'm not aware of any hubs and drums that can be swapped onto the '63-'70 spindles that will have a smaller hub register.

72freak · 01-17-2011, 07:15 AM

Quote:

Originally Posted by Captainfab

It has been my understanding that most if not all aftermarket wheels had a center bore large enough to fit the hubs on these older trucks. I could be wrong though on some of the newer larger diameter wheels. I'm not aware of any hubs and drums that can be swapped onto the '63-'70 spindles that will have a smaller hub register.

You are correct....there are 1000's of wheels made for our 6 lug trucks....unfortunatley, there are several STYLES of wheels that look VERY good that do not come in a center bore large enough to go on them. The 6 lug torq thrust style wheels offered by many companies is one of them. Go to any wheel site and find the center bore size for our trucks...I think its 4.25 and then look at all the 6 lug wheels that are 3.50, 3.75 and so on. There are a lot of threads on this site about miling them down. Summit, Coys, American Racing. I assure you there is also a thread on this site somewhere about swapping drums to car or van drums for a smaller center bore. I read it about a year ago. They may have been Pontiacdrums and bearings...I just cant remember. Hopefully some one will be able to find it.

72freak · 02-06-2011, 08:48 AM

Ttt

padresag · 02-06-2011, 11:54 AM

you can always have them machined to fit. the hubs on my trailer are a little to big for the set of rallye wheels that I have , so I am just going to chuck them up and machine the hubs down a bit to fit
ron

**slepysal** · 02-06-2011, 12:29 PM

Most wheel manufactures make there wheels with the bigger hub hole and use "hub centrict"rings that allow the wheels to fit the newer smaller hole hub this saves them money and invantory.
The catch comes when the wheels are made for specifc applications. Newer 6 lug Chevy/ GMC use the smallar hub bore and require a medium off set wheel of up to +20MM,ours take a standard or zero off set or a reversed (deep dish) off set in some cases.
What type and size of wheel were you looking for?

protrash64 · 02-06-2011, 01:30 PM

If you have disc's up front they fit just fine.

01-16-2011, 07:40 AM	#1
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Front wheel center bore too big issue...what to do? Ive searched for a thread I have read but I cant find it. As we all know the front drums on all these 6 lug trucks require such a large "center bore" on the rims we are limited on the wheels we can run. Im not interested at this time in doing a major running gear conversion but I have seen threads on milling the wheels OR changing the front brake drums and bearings over to those from a 6 lug car or van. I have read the thread but I cant find it. I really want to run some 17, 18, or 20's in a 6 lug Torq Thrust style rim. Thread links, ideas or help would be appreciated. __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

01-17-2011, 12:58 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Front wheel center bore too big issue...what to do? It has been my understanding that most if not all aftermarket wheels had a center bore large enough to fit the hubs on these older trucks. I could be wrong though on some of the newer larger diameter wheels. I'm not aware of any hubs and drums that can be swapped onto the '63-'70 spindles that will have a smaller hub register. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

02-06-2011, 08:48 AM	#4
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: Front wheel center bore too big issue...what to do? Ttt __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

02-06-2011, 11:54 AM	#5
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: Front wheel center bore too big issue...what to do? you can always have them machined to fit. the hubs on my trailer are a little to big for the set of rallye wheels that I have , so I am just going to chuck them up and machine the hubs down a bit to fit ron

02-06-2011, 12:29 PM	#6
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: Front wheel center bore too big issue...what to do? Most wheel manufactures make there wheels with the bigger hub hole and use "hub centrict"rings that allow the wheels to fit the newer smaller hole hub this saves them money and invantory. The catch comes when the wheels are made for specifc applications. Newer 6 lug Chevy/ GMC use the smallar hub bore and require a medium off set wheel of up to +20MM,ours take a standard or zero off set or a reversed (deep dish) off set in some cases. What type and size of wheel were you looking for? __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

02-06-2011, 01:30 PM	#7
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: Front wheel center bore too big issue...what to do? If you have disc's up front they fit just fine. Attached Images __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device



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