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#1 |
Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Min Wheel Dia to clear discs and 2.5 spindles?
Going to the next phase with the '67. 2.5" Western spindles, bags and '69 discs up front. My current wheels, 8.5" (4" bs) w/275-60 15 tires, are too wide to clear the inside of the fender. I don't want to end up grinding the spindles like I did last time when I tried this with 15" wheels. Are 16" steel wheels going to clear the discs? I am trying to retain the old school (low cost) look so no 18-20's! I am thinking a 16 x 8 steel wheel with 4" bs and 225 tire...poverty look with some tire width. Any suggestions?
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 01-08-2008 at 10:36 AM. |
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#2 |
Registered User
Join Date: Sep 2003
Location: Rayne, LA
Posts: 2,782
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
15" steel or aluminum wheels will clear the discs and calipers just fine. Are you talking about having to clearance the control arm because of the backspacing mixed with the drop spindle?
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Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build Last edited by smbrouss70; 01-08-2008 at 10:46 AM. |
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#3 |
Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
Yes, last time I did this with DJM spindles on a '77 they did not clear and I had to grind material off the spindles in places. It was pain! It would only happen on hard cornering when the wheels would flex...but still a pain. The wheels were Crager SS. Thicker alumninum wheels would have been worse. I think jumping to a 16" will add an additional 0.5" on the diameter and should be fine and still be very cheap. This is a minimalist build...LOL!
Thanks
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 01-08-2008 at 11:01 AM. |
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#4 |
Registered User
Join Date: Sep 2003
Location: Rayne, LA
Posts: 2,782
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
I can't say for sure, (never tried 16's) but it sounds logical. Maybe someone else will chime in with some real-world experience.
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Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build |
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#5 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,699
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
I've never had to grind the spindle itself. I've had to grind/clearance the outer edge of the lower control arm. If you run a 15" wheel with more than 3.5" of backspacing, (as in 15x8 ralley with a 4" BS), you will need to do the trimming. I say trim the lower arm and buy whatever wheels you want. You never know when you might have to bolt on a set of 15's. Whatever you decide,... the spindle manufacturer puts the task of checking all clearances on YOU. I usually have to tweek the "metal part of the caliper brake line also. No big deal.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 01-08-2008 at 12:44 PM. |
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#6 |
It'd be alot cooler if you did
Join Date: May 2003
Location: Three Rivers, MI
Posts: 2,345
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
I normally run a 17x8 with 4.5" of back spacing. I have been rolling the truck around on a set of caprice rally's that are 15x7, not sure on the back spacing but there is alot. I have 3" drop spindles and have noticed no problems with clearance issues, but like I said I have not driven it with those wheels just moved it around in the garage. Also I have tubular control arms... that might do away with clearance issues as well, but I'm not sure.
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#7 |
Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
Thanks for reminding me about the LCA's with the 15-in. wheels. I had another member remind me today about that when I diagnosed (last year) his clearance problems...LOL! I guess I can probably get by with 15's then. I now have to see if I can work a swap with another local member that wants my 15" slots.
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) |
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#8 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,982
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
It's the back-spacing that's more critical vs. wheel diameter. As was mentioned, keep the BS to a minimum & you'll have less issue w/interference. My 74 has 18x8's & they rub the control arms when it gets close to full lock because my wheels have 5.25" BS.
I had 15x6.5" van ralleys w/2.5" WesternChassis spindles on my 68 & they didn't rub anywhere.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. Last edited by SCOTI; 01-08-2008 at 06:21 PM. |
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#9 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
Scoti is right about the backspace. My drop spindles make the wheels stick out further. I wish my rims were 7" front with narrower tires. I have 275/60/15 and 15x 8 with 3.75" backspace with wheel weights on the back of the rim and I had to grind a little off the spindle.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#10 |
1972 Chevrolet SWB
Join Date: Jan 2008
Location: FT Smith AR
Posts: 512
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
I have 15x8 Chevy Truck rally wheels on my truck,with a ECE 2.5 spindle and a 3" coil,and there are no issues so far but I have heard and seen issues with lower control arm trimming. I was planning on a 15x6 frt rally and a 15x10 rear rally so Im suree I will have even more clearance with that combo.
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My New thread with pics (not my build thread yet.) ![]() http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd. |
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#11 |
Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Min Wheel Dia to clear discs and 2.5 spindles?
Hmmmmm....sounding more like 7" rim, with 3.4-4 bs which should be easier to find. Thanks.
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) |
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