Tire size help. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GobbleStalker · 11-25-2010, 12:29 PM

Ok I have a tire question. I am lowering my c10 LWB 3.5 in the front with 2.5 spindles and a 1 inch lowering coil and the rear is going down 5” with lowering coils. I have purchased the following rims for my truck and need help on an appropriate tire size.

Front rims are 17x8 while the rears are 17x9.5.

Is anyone running this combo of rims on their truck?

Thanks
Kev

PTS · 11-28-2010, 04:28 AM

Hello Kev!

I did a set of wheels for a customer in the same size. In my opinion a long bed need a little rake and this setup looks great. Whats the backspace on the wheels you purchased?

Tires:

Front 25560R17 Overall Diameter is 29.1"

Rear 27560R17 Overall Diameter is 30.0"

Let me know if you need anymore information!

Regards,

Perry Price
PTS

C10-Driver · 11-28-2010, 01:27 PM

Here are some pictures of my 68 longbox with a 4/5 drop, 17x8's and 255-60-17's all around. I sold the truck recently but if I still had it, I would likely be putting a set of 275's on the back like the truck Perry mentioned. I think the stance was just about perfect and would have been that much better with the 275's out back.

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GobbleStalker · 11-28-2010, 11:28 PM

If I measure from the inside bolt holes straight up to the edge of the rim I have 5 3/8 inches. Hope this is okay? I got the rims for a steal brand new in the box eagle alloy 211's. Thanks for your help.

Kevin

Lolyin58 · 11-29-2010, 12:14 AM

I have did a couple of trucks with 275/50/17 in the a rear and 255/50/17 in the front. It worked well and looked awesome.

C10-Driver · 11-29-2010, 01:35 AM

Quote:

Originally Posted by GobbleStalker

If I measure from the inside bolt holes straight up to the edge of the rim I have 5 3/8 inches. Hope this is okay? I got the rims for a steal brand new in the box eagle alloy 211's. Thanks for your help.

Kevin

Is that the front or the back wheels? You should be looking for about a 4.5" backspace measurement on the 8" wheels and 5" to 5.5" on the 9.5" wheels. Any less than that and the wheels will start pushing out past the fender lip.

For reference, backspace is the distance from the mounting surface to the back edge of the wheel (you gave a measurement to the front face - correct?). An 8" wheel actually measure about 9" including the lip. A 4.5" backspace would be an even (or zero) offset, taking into account the extra 1/2" for the lip.

Are your wheels a 5 on 5 bolt pattern. If so, I checked the Eagle website and it looks like the 8" wheels only come with a 4.5" backspace and the 9.5" only come with a 5.5. If so, check out some pictures of my green truck... It has that exact combination on it.

**Already Gone** · 11-29-2010, 05:16 AM

ttt

68Stepbed · 11-29-2010, 09:12 AM

3.5/5 drop. 17x8-255/50/17 front, 17x9.5-275/55/17 rear.

GobbleStalker · 11-29-2010, 07:28 PM

Quote:

Originally Posted by C10-Driver

Is that the front or the back wheels? You should be looking for about a 4.5" backspace measurement on the 8" wheels and 5" to 5.5" on the 9.5" wheels. Any less than that and the wheels will start pushing out past the fender lip.

For reference, backspace is the distance from the mounting surface to the back edge of the wheel (you gave a measurement to the front face - correct?). An 8" wheel actually measure about 9" including the lip. A 4.5" backspace would be an even (or zero) offset, taking into account the extra 1/2" for the lip.

Are your wheels a 5 on 5 bolt pattern. If so, I checked the Eagle website and it looks like the 8" wheels only come with a 4.5" backspace and the 9.5" only come with a 5.5. If so, check out some pictures of my green truck... It has that exact combination on it.

Yes my wheel are 5 x5 bolt pattern and you are correct.

Thanks for all the help.

Kevin

Hoffa · 11-30-2010, 02:06 AM

Here are pictures of mine with 17x8 w/255-60's on the front and 17x9.5 w/275-60's on the rear. I have 4.5" BS front and 5" BS rear. I have 2.5 spindles and 1" springs in the front and air bags in the rear simulating a 5" drop.

Another fact to remember when comparing BS numbers with others is rear end width. The 67-69 had a narrower housing (1.5" narrower) then the 70-72 housings. On my pickup, I used the wider housing so that I could use the 5" BS instead of 4.5" (common BS for the narrower housing). I did this for looks to keep my hubcaps from being to far inset.

Hope this helps.

Rafael505 · 05-31-2011, 01:12 PM

I have 245/60-15 on front and 275/60-15 on back I plan on dropping it 5/4

Sicklajoie · 05-31-2011, 04:12 PM

Quote:

Originally Posted by Hoffa

Here are pictures of mine with 17x8 w/255-60's on the front and 17x9.5 w/275-60's on the rear. I have 4.5" BS front and 5" BS rear. I have 2.5 spindles and 1" springs in the front and air bags in the rear simulating a 5" drop.

Another fact to remember when comparing BS numbers with others is rear end width. The 67-69 had a narrower housing (1.5" narrower) then the 70-72 housings. On my pickup, I used the wider housing so that I could use the 5" BS instead of 4.5" (common BS for the narrower housing). I did this for looks to keep my hubcaps from being to far inset.

Hope this helps.

That's a great looking setup. Fills the wheel wells nicely.

11-25-2010, 12:29 PM	#1
GobbleStalker GobbleStalker Calls Join Date: Aug 2010 Location: Port Hope, Ontario Posts: 653	Tire size help. Ok I have a tire question. I am lowering my c10 LWB 3.5 in the front with 2.5 spindles and a 1 inch lowering coil and the rear is going down 5” with lowering coils. I have purchased the following rims for my truck and need help on an appropriate tire size. Front rims are 17x8 while the rears are 17x9.5. Is anyone running this combo of rims on their truck? Thanks Kev __________________ 72 Chev Longbox Highlander edition. Med Olive/White/ Med Olive 350 4bbl with 350Turbo trans. Truck currently under construction. Project Cappaccino. Stay Tuned! 1967 Chevy C10, 327, 4.11 posi 3 spd. The Driver Truck! SOLD! 09 GMC Sierra SLT All Terrain pkg. 2014 Jeep Wrangler Sahara unlimited. ( The wifes ride )

11-28-2010, 04:28 AM	#2
PTS Junior Member Join Date: Nov 2005 Location: Roswell, N.M. Posts: 241	Re: Tire size help. Hello Kev! I did a set of wheels for a customer in the same size. In my opinion a long bed need a little rake and this setup looks great. Whats the backspace on the wheels you purchased? Tires: Front 25560R17 Overall Diameter is 29.1" Rear 27560R17 Overall Diameter is 30.0" Let me know if you need anymore information! Regards, Perry Price PTS Last edited by PTS; 11-28-2010 at 04:29 AM.

11-28-2010, 01:27 PM	#3
C10-Driver Chevy Truck Addict Join Date: Aug 2006 Location: Kelowna, BC Posts: 1,176	Re: Tire size help. Here are some pictures of my 68 longbox with a 4/5 drop, 17x8's and 255-60-17's all around. I sold the truck recently but if I still had it, I would likely be putting a set of 275's on the back like the truck Perry mentioned. I think the stance was just about perfect and would have been that much better with the 275's out back. __________________ . 1970 Chev C/10 SWB, 355 SBC, 700R4, 3.73 Posi, Air Ride (Click to view Build Thread) (SOLD) 1978 Chevy C/10 SWB 1970 Pontiac Lemans .

11-28-2010, 11:28 PM	#4
GobbleStalker GobbleStalker Calls Join Date: Aug 2010 Location: Port Hope, Ontario Posts: 653	Re: Tire size help. If I measure from the inside bolt holes straight up to the edge of the rim I have 5 3/8 inches. Hope this is okay? I got the rims for a steal brand new in the box eagle alloy 211's. Thanks for your help. Kevin __________________ 72 Chev Longbox Highlander edition. Med Olive/White/ Med Olive 350 4bbl with 350Turbo trans. Truck currently under construction. Project Cappaccino. Stay Tuned! 1967 Chevy C10, 327, 4.11 posi 3 spd. The Driver Truck! SOLD! 09 GMC Sierra SLT All Terrain pkg. 2014 Jeep Wrangler Sahara unlimited. ( The wifes ride ) Last edited by GobbleStalker; 11-28-2010 at 11:33 PM.

11-29-2010, 12:14 AM	#5
Lolyin58 Registered User Join Date: Mar 2008 Location: Calgary,Alberta,Canada Posts: 372	Re: Tire size help. I have did a couple of trucks with 275/50/17 in the a rear and 255/50/17 in the front. It worked well and looked awesome.

11-29-2010, 05:16 AM	#7
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,108	Re: Tire size help. ttt __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

11-29-2010, 09:12 AM	#8
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: Tire size help. 3.5/5 drop. 17x8-255/50/17 front, 17x9.5-275/55/17 rear. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

11-30-2010, 02:06 AM	#10
Hoffa Registered User Join Date: Oct 2006 Location: Roseburg, Oregon Posts: 105	Re: Tire size help. Here are pictures of mine with 17x8 w/255-60's on the front and 17x9.5 w/275-60's on the rear. I have 4.5" BS front and 5" BS rear. I have 2.5 spindles and 1" springs in the front and air bags in the rear simulating a 5" drop. Another fact to remember when comparing BS numbers with others is rear end width. The 67-69 had a narrower housing (1.5" narrower) then the 70-72 housings. On my pickup, I used the wider housing so that I could use the 5" BS instead of 4.5" (common BS for the narrower housing). I did this for looks to keep my hubcaps from being to far inset. Hope this helps. Attached Images __________________ 68 Chev SWB 2WD w/'95 LT1, 6spd, 4:56, 17" whls - family owned since 1973. 70 GMC LWB 4WD w/RAMJET 350, 4spd, 4inch lift, 33" tires, Warn Winch 72 Chev Blazer CST, 350, TH350, 4WD, factory A/C, tilt, radio delete, 77K miles, orig. paint/interior

05-31-2011, 01:12 PM	#11
Rafael505 Registered User Join Date: Oct 2008 Location: Los Town, New mexico Posts: 217	Re: Tire size help. I have 245/60-15 on front and 275/60-15 on back I plan on dropping it 5/4 __________________ Check out my Photos http://67-72chevytrucks.com/gallery/...ry.php?cat=769 L.L. N.M. 63 chevy c-10 67 chevy c-10 71 chevy Blazer 4x4



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