Please, need help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jcentsr6 · 07-24-2007, 07:12 AM

I am going to try to make this simple....

I have a 70 truck with drums on it. 6 LUG.

If I put wheels on the truck prior to installing disc brakes will the fitment change when I go to install the brakes?

I was going to measure up everything and order a set of wheels..but am worried that when I convert to disc brakes that the settings may change, Is this correct. (or arer the rotors the same width as the drums?)

Thanks

suville · 07-24-2007, 07:56 AM

Just get 6 lug rotors from one of the vendors on here.

**LockDoc** · 07-24-2007, 07:57 AM

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Usually, when you change to disk brakes they will be 5 lug instead of 6. You may be able to get a 6 lug disk brake kit but I think I would wait on the wheels until you get the brakes updated....

LockDoc

mrein3 · 07-24-2007, 08:00 AM

On 4x4s, if you have rims that were originally on a drum brake truck, they won't fit over the calipers on the front disc brakes.

On 2wd, 6-lug conversion disc brakes I'm not sure. But I'm guessing that if you buy rims that fit over the disc brakes on a 71+ 4x4, they'll work on your aftermarket calipers.

**LockDoc** · 07-24-2007, 08:01 AM

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You may want to read this thread.

http://67-72chevytrucks.com/vboard/s...d.php?t=249394

LockDoc

notahybrid · 07-24-2007, 08:06 AM

There are 6 lug conversions out there. The ones I have seen all require a minimum of 15" rim. Some bolt to the stock spindles some do not. I am speaking from searches that I did for my 68 c10.

Longhorn Man · 07-24-2007, 01:40 PM

everything said here is true.
common disk conversions are 5 lug.
You can get 6 lug rotors at quite an increase in cost
Wheels made for drum brakes, will not fit over disk brakes.

The one thing left out, is the increased track width. The disks will push the wheels out further, and if you are pushing the limits on wheel clearance, then you can run into trouble.

Personally, I would recomend going 5 lug... it'll cost a tad more to do becouse you'll have to replace your wheels (which is already in your plan, so that's a moot point) and you'll have to convert the rear. However, it'll save money over the years becouse replacement 5 lug rotors are dirt cheap and at most every parts house in the nation, while the 6 lug ones would have to be special order and are quite spendy.

PanelDeland · 07-24-2007, 05:05 PM

LHM,I have to disagree with the 6 lug disc's rotors being pricey.Though I haven't bought a set for replacements but the kit to convert was the same price whether I went 5 or 6 lug.There are way more options in 5 lug for wheels and there are options in rotor thickness for the 5 lug.Some of the FAQ write ups will give details.

Longhorn Man · 07-24-2007, 05:40 PM

at $95 each (I just priced them 2 min ago on a vendors site) they cost at least twice what the 5 lug ones would cost at napa, and more yet compaired to a normal parts chain store. you won't get those 6 lug rotors at any chain store, they are a specialty item.
Also a note, i did not seek out the high priced vendors... one of the middle of the road guys.

07-24-2007, 07:12 AM	#1
Jcentsr6 Junior Member Join Date: Jul 2007 Location: Odenton, Md Posts: 552	Please, need help I am going to try to make this simple.... I have a 70 truck with drums on it. 6 LUG. If I put wheels on the truck prior to installing disc brakes will the fitment change when I go to install the brakes? I was going to measure up everything and order a set of wheels..but am worried that when I convert to disc brakes that the settings may change, Is this correct. (or arer the rotors the same width as the drums?) Thanks __________________ going to sell this one...looking for a SWB project next.

07-24-2007, 07:56 AM	#2
suville Registered User Join Date: Jun 2003 Location: Mtn. Home, Idaho Posts: 906	Re: Please, need help Just get 6 lug rotors from one of the vendors on here.

07-24-2007, 07:57 AM	#3
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: Please, need help - Usually, when you change to disk brakes they will be 5 lug instead of 6. You may be able to get a 6 lug disk brake kit but I think I would wait on the wheels until you get the brakes updated.... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

07-24-2007, 08:00 AM	#4
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	Re: Please, need help On 4x4s, if you have rims that were originally on a drum brake truck, they won't fit over the calipers on the front disc brakes. On 2wd, 6-lug conversion disc brakes I'm not sure. But I'm guessing that if you buy rims that fit over the disc brakes on a 71+ 4x4, they'll work on your aftermarket calipers. __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

07-24-2007, 08:01 AM	#5
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: Please, need help - You may want to read this thread. http://67-72chevytrucks.com/vboard/s...d.php?t=249394 LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

07-24-2007, 08:06 AM	#6
notahybrid Registered User Join Date: Mar 2007 Location: Chesapeake, Virginia Posts: 39	Re: Please, need help There are 6 lug conversions out there. The ones I have seen all require a minimum of 15" rim. Some bolt to the stock spindles some do not. I am speaking from searches that I did for my 68 c10.

07-24-2007, 01:40 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Please, need help everything said here is true. common disk conversions are 5 lug. You can get 6 lug rotors at quite an increase in cost Wheels made for drum brakes, will not fit over disk brakes. The one thing left out, is the increased track width. The disks will push the wheels out further, and if you are pushing the limits on wheel clearance, then you can run into trouble. Personally, I would recomend going 5 lug... it'll cost a tad more to do becouse you'll have to replace your wheels (which is already in your plan, so that's a moot point) and you'll have to convert the rear. However, it'll save money over the years becouse replacement 5 lug rotors are dirt cheap and at most every parts house in the nation, while the 6 lug ones would have to be special order and are quite spendy.

07-24-2007, 05:05 PM	#8
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: Please, need help LHM,I have to disagree with the 6 lug disc's rotors being pricey.Though I haven't bought a set for replacements but the kit to convert was the same price whether I went 5 or 6 lug.There are way more options in 5 lug for wheels and there are options in rotor thickness for the 5 lug.Some of the FAQ write ups will give details. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

07-24-2007, 05:40 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Please, need help at $95 each (I just priced them 2 min ago on a vendors site) they cost at least twice what the 5 lug ones would cost at napa, and more yet compaired to a normal parts chain store. you won't get those 6 lug rotors at any chain store, they are a specialty item. Also a note, i did not seek out the high priced vendors... one of the middle of the road guys.



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