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05-13-2015, 01:40 AM
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#1 |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Wheel fitment
Does anyone know if a 17 inch wheel will fit over disc brakes when switching to disc brakes from drums? I have a 70 c20 by the way
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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05-13-2015, 02:22 AM
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#2 |
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Too many projects
Join Date: Mar 2004
Location: Fargo, ND land of the flat hills
Posts: 1,147
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Re: Wheel fitment
A 17 should fit fine, the smaller 16s are stock on 3/4 tons so I wouldn't worry about it.
If you are concerned you can mock up the rotor and caliper inside the wheel to double check while the parts are still returnable.
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Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" |
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05-13-2015, 11:59 PM
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#3 | |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Re: Wheel fitment
Quote:
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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05-14-2015, 12:11 AM
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#4 |
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Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,186
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Re: Wheel fitment
Stock 1970 and earlier drum brake wheels (3 nub steelies) won't fit. Modern 17's didn't come around until well into the disc brake era and should fit fine as long as they don't have a goofy backspace.
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05-14-2015, 12:13 AM
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#5 | |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Re: Wheel fitment
Quote:
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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05-14-2015, 08:02 AM
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#6 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,715
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Re: Wheel fitment
Disc brakes move the wheels out some. The reason the stock wheels don't fit disc brakes isn't the diameter but the shape of the center. It is not shaped to clear the caliper. 17's have the most tire sizes available and probably wheel choice as well.
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05-14-2015, 10:07 AM
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#7 | |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Re: Wheel fitment
Quote:
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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05-14-2015, 10:19 AM
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#8 |
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Registered User
Join Date: Jul 2013
Location: Prescott Arizona
Posts: 343
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Re: Wheel fitment
Mike's right the "Center section" and the "Hoop" are too close to clear disc brake calipers, sometimes even grinding on the calipers won't help. Also the back spacing is critical as the improper offset can cause the inner rim edge to hit steering knuckles, tie rods, sway bar, etc.
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68 GMC SWB Vortec 5.3 98 Chevy Blazer ZR2 94 Mazda Miata, LS2 6 speed, sold "No matter what happens, nobody gets out alive" Last edited by Lees68GMC; 05-14-2015 at 10:29 AM. |
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05-14-2015, 10:40 AM
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#9 | |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Re: Wheel fitment
Quote:
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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05-14-2015, 10:20 PM
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#10 |
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Roto Reuter thats the name...
 
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
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Re: Wheel fitment
17" Hummer wheels fit on my 69 C20 with front disc brake conversion.
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~ Dan  My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
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05-14-2015, 11:58 PM
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#11 | |
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Registered User
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
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Re: Wheel fitment
Quote:
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1972 gmc c15 short bed... Sold 1970 chevy custom camper patina daily driver |
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