![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
|
C20 17.5 wheels and disk brakes...
While there's lots of diameter there to play with, am assuming the narrow 5.5 width might result in the inner taper of the wheel, or possibly, the inner flat part of the large dia wheel, not being able to clear a caliper. Has anyone done front disks with stock 17.5s? Just curious. Thanks.
|
![]() |
![]() |
![]() |
#2 |
Registered User
![]() Join Date: Aug 2010
Location: Burbank CA
Posts: 3,055
|
Re: C20 17.5 wheels and disk brakes...
Good question. I'll piggyback on your question and ask the same about the rare 19.5 X 5.25's.
Last edited by oem4me; 12-02-2016 at 09:56 PM. |
![]() |
![]() |
![]() |
#3 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
|
Re: C20 17.5 wheels and disk brakes...
ttt. still curious if anyone has attempted this.
Last edited by jocko; 06-04-2017 at 11:59 PM. |
![]() |
![]() |
![]() |
#4 |
Senior Member
![]() Join Date: Mar 2015
Location: Arizona from Overland Park Kansas
Posts: 3,968
|
Re: C20 17.5 wheels and disk brakes...
Bringing this back to the top for 19.5 wheels.
__________________
Current projects: 1966 Chevy Custom PS PB A/C BBW 283 v8 3 speed OD 1966 GMC Long Step 1966 GMC 3/4 ton Custom PS PB Sport trim 351 v6 1966 GMC 3/4 ton 4x4 Custom PB 305 v6 np435 1960 GMC Custom 1968 GMC 3/4 ton 4x4 Short Bed 1962 K20 Tow truck 1961 GMC Extended Suburban Panel and a few more |
![]() |
![]() |
![]() |
#5 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
|
Re: C20 17.5 wheels and disk brakes...
ttt for any of the tall skinny C20/30 wheels with disk brakes added (not locking rims, talkin bout 17.5/19.5 steelies. Anyone done this?
|
![]() |
![]() |
![]() |
#6 |
Registered User
![]() Join Date: Oct 2013
Location: lousiville Ky
Posts: 2,649
|
Re: C20 17.5 wheels and disk brakes...
Not an exact answer, do know the original 16x5.5 6 lug, 3 nub wheels, work on a 1978 Dana 44 front axle, with disks. Have a 17.5 6 lug will try to put it on same Dana axle with factory disk brakes. These are all 1/2 ton applications. Not sure how the 8 lug SRW disks design differ, along with 2 and 4 wheel drive applications. Will examine both 17.5, 6 and 8 lug wheels for BS and rim design for differences. I think the 19.5s have a different BS, then the 17.5s.
Les Last edited by aotte1; 06-13-2017 at 01:29 AM. |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jun 2006
Location: virginia
Posts: 100
|
Re: C20 17.5 wheels and disk brakes...
In the early 80's I had a 71 GMC 3/4 4wd with disc front brakes with 9.50 x 16.5 tires and 4.10 gears.
I had bought a car about 3-400 miles away and needed to pick it up. I worked in a salvage yard and had to watch every penny. We had an old (58 or 59) 8 lug truck in the yard with a set of 7.00x17's with tubes and split rims, the tires were like new tread wise but very old Firestone "gum dipped" highway tread. In hindsight this wasn't real bright on my part (I seem to remember them being a bit dry rotted, but heck they had tubes in them) but I put them on my truck because they were so tall compared to my 16.5's I figured my fuel economy would improve similar to putting 3.73's in the truck for the road trip. They fit on the truck fine and I had no problem on the trip Just one example of some of the stupid stuff I did when young |
![]() |
![]() |
![]() |
#8 |
Senior Member
![]() Join Date: Mar 2015
Location: Arizona from Overland Park Kansas
Posts: 3,968
|
Re: C20 17.5 wheels and disk brakes...
Well I found the answer I needed for my 57 van. I took one 55-59 19.5 and one 60-68 19.5 and tried them on the front of a 2008-ish Chevy van. They both fit.
__________________
Current projects: 1966 Chevy Custom PS PB A/C BBW 283 v8 3 speed OD 1966 GMC Long Step 1966 GMC 3/4 ton Custom PS PB Sport trim 351 v6 1966 GMC 3/4 ton 4x4 Custom PB 305 v6 np435 1960 GMC Custom 1968 GMC 3/4 ton 4x4 Short Bed 1962 K20 Tow truck 1961 GMC Extended Suburban Panel and a few more |
![]() |
![]() |
![]() |
#9 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
|
Re: C20 17.5 wheels and disk brakes...
No way! That's good news. Don't suppose you have a 17.5 lying around you could check?
![]() |
![]() |
![]() |
![]() |
#10 |
Senior Member
![]() Join Date: Mar 2015
Location: Arizona from Overland Park Kansas
Posts: 3,968
|
Re: C20 17.5 wheels and disk brakes...
I do not have regular access to the van but next time I do I will try a 17.5 wheel.
__________________
Current projects: 1966 Chevy Custom PS PB A/C BBW 283 v8 3 speed OD 1966 GMC Long Step 1966 GMC 3/4 ton Custom PS PB Sport trim 351 v6 1966 GMC 3/4 ton 4x4 Custom PB 305 v6 np435 1960 GMC Custom 1968 GMC 3/4 ton 4x4 Short Bed 1962 K20 Tow truck 1961 GMC Extended Suburban Panel and a few more |
![]() |
![]() |
![]() |
#11 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
|
Re: C20 17.5 wheels and disk brakes...
that would be great, thank you. So, a 2008 would be lug centric but same bc, if I'm not mistaken - with slightly different (metric) studs(?) Any details on the swap you're thinking about or are you just using the 2008 as a basis for comparison for caliper interference?
|
![]() |
![]() |
![]() |
#12 | |
Senior Member
![]() Join Date: Mar 2015
Location: Arizona from Overland Park Kansas
Posts: 3,968
|
Re: C20 17.5 wheels and disk brakes...
Quote:
Here is the link to the bracket kit for the swap. http://www.thehollisterroadcompany.c...converion.html
__________________
Current projects: 1966 Chevy Custom PS PB A/C BBW 283 v8 3 speed OD 1966 GMC Long Step 1966 GMC 3/4 ton Custom PS PB Sport trim 351 v6 1966 GMC 3/4 ton 4x4 Custom PB 305 v6 np435 1960 GMC Custom 1968 GMC 3/4 ton 4x4 Short Bed 1962 K20 Tow truck 1961 GMC Extended Suburban Panel and a few more |
|
![]() |
![]() |
![]() |
Bookmarks |
Tags |
17.5, c20, disk brakes |
|
|