255/70 R15 Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jimjific · 12-04-2013, 04:37 PM

Hello,

I'm hoping someone can help me determine the diameter of the wheel/tire combo of a 255/70R15 mounted on a 15 x 8 rim. I have a set of rally's that I want to run on a stock height C-10 Short Stepside and I am thinking of going with that size tire. Could someone running this combo measure their tire and let me know? It would be nice to have a feel for how it will compare to what I'm running now before I make the tire investment.

Thanks,
Jim

**Stocker** · 12-04-2013, 04:49 PM

Per Tire Rack, 29.1".

**Already Gone** · 12-04-2013, 04:53 PM

I have the same tires on my truck and the height is 29.4 inches. They should work well and fill out your wheelwells real nice on your stock height truck.

Jimjific · 12-04-2013, 04:54 PM

Cool, thanks for the quick replies.

Jim

CC69Rat · 12-04-2013, 05:37 PM

Dad and I built this truck a while back ..

http://67-72chevytrucks.com/vboard/s...=457529&page=3

Post #66. That's how it would look, .. 255/70/15 on an 8" steelie, should be the same backspacing and fit the same on your 69. We had 4" drop springs in this truck. ~3" drop in the front, 235/70/15. It sat pretty good, .. I miss this old truck.

Kennuck · 12-04-2013, 06:30 PM

My Short step with 255 70 15 tires no drop, yet :-)

Kennuck · 12-04-2013, 06:32 PM

Forgot to attach the pic

Jimjific · 12-04-2013, 06:54 PM

Thanks for the pictures. Your trucks look great with the tire wheel combo, looks like a winner. I will post pictures of before and after when I get them. It will be a little bit since I have to finish sand blasting three more rims and it's getting cold here in upstate NY. I have the rings and centers all ready to go.

Jim

Jimjific · 12-04-2013, 09:04 PM

__

Kennuck · 12-04-2013, 09:15 PM

I like the Rally's I'm going that route too once I get my 5 lug disc brake conversion completed.

Jimjific · 12-04-2013, 09:12 PM

Here's an image of the one rim I have done. I might want to go with a darker paint color for more contrast. I can't wait to see them on the truck.

guzzidude · 12-04-2013, 09:22 PM

Should have bought from Direct Tire on Cyber Monday. They had 255/70r15 Cooper Cobra Radials for $398 shipped. Today they are up around $500 again. Uggh. Xmas stopped me.

JimboC10 · 12-04-2013, 09:33 PM

255 x .7 = 178.5
178.5 X 2 = 357
357 ÷ 25.4 = 14
14 + 15 = 29

29 inch (approx) diameter

This is two sidewalls added to 15 in. wheel to get tire diameter.

Hawghauler · 12-04-2013, 09:45 PM

Here's a great place to compare tire sizes. I used them when I went hunting the right size snow tires for my truck.

http://ejelta.com/tiresize/index.htm...el=&maxdelta=2

slow-1 · 12-05-2013, 11:20 PM

I am running that size tires.

12-04-2013, 04:37 PM	#1
Jimjific Registered User Join Date: Aug 2013 Location: Albany, NY Posts: 145	255/70 R15 Help Hello, I'm hoping someone can help me determine the diameter of the wheel/tire combo of a 255/70R15 mounted on a 15 x 8 rim. I have a set of rally's that I want to run on a stock height C-10 Short Stepside and I am thinking of going with that size tire. Could someone running this combo measure their tire and let me know? It would be nice to have a feel for how it will compare to what I'm running now before I make the tire investment. Thanks, Jim __________________ Thanks, Jim - 69 Short Step CST 350 AC/PB/PS - 69 Short Step 307 Man Column/PS

12-04-2013, 04:49 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,722	Re: 255/70 R15 Help Per Tire Rack, 29.1". __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

12-04-2013, 04:53 PM	#3
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,143	Re: 255/70 R15 Help I have the same tires on my truck and the height is 29.4 inches. They should work well and fill out your wheelwells real nice on your stock height truck. __________________ 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

12-04-2013, 04:54 PM	#4
Jimjific Registered User Join Date: Aug 2013 Location: Albany, NY Posts: 145	Re: 255/70 R15 Help Cool, thanks for the quick replies. Jim __________________ Thanks, Jim - 69 Short Step CST 350 AC/PB/PS - 69 Short Step 307 Man Column/PS

12-04-2013, 05:37 PM	#5
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,212	Re: 255/70 R15 Help Dad and I built this truck a while back .. http://67-72chevytrucks.com/vboard/s...=457529&page=3 Post #66. That's how it would look, .. 255/70/15 on an 8" steelie, should be the same backspacing and fit the same on your 69. We had 4" drop springs in this truck. ~3" drop in the front, 235/70/15. It sat pretty good, .. I miss this old truck. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

12-04-2013, 06:30 PM	#6
Kennuck Registered User Join Date: Oct 2013 Location: Dresden, Ontario Posts: 647	Re: 255/70 R15 Help My Short step with 255 70 15 tires no drop, yet :-) __________________ 1970 Short Wide 5.3 4L60E BlackBear tune 3:73 gears, Boyd's Tank 2.5 / 4 drop 5 lug disc brakes Vintage Air 18x8 Ridlers 255/55 frt. 18x9.5 275/60 rear

12-04-2013, 06:32 PM	#7
Kennuck Registered User Join Date: Oct 2013 Location: Dresden, Ontario Posts: 647	Re: 255/70 R15 Help Forgot to attach the pic Attached Images __________________ 1970 Short Wide 5.3 4L60E BlackBear tune 3:73 gears, Boyd's Tank 2.5 / 4 drop 5 lug disc brakes Vintage Air 18x8 Ridlers 255/55 frt. 18x9.5 275/60 rear

12-04-2013, 06:54 PM	#8
Jimjific Registered User Join Date: Aug 2013 Location: Albany, NY Posts: 145	Re: 255/70 R15 Help Thanks for the pictures. Your trucks look great with the tire wheel combo, looks like a winner. I will post pictures of before and after when I get them. It will be a little bit since I have to finish sand blasting three more rims and it's getting cold here in upstate NY. I have the rings and centers all ready to go. Jim __________________ Thanks, Jim - 69 Short Step CST 350 AC/PB/PS - 69 Short Step 307 Man Column/PS

12-04-2013, 09:04 PM	#9
Jimjific Registered User Join Date: Aug 2013 Location: Albany, NY Posts: 145	Re: 255/70 R15 Help __ __________________ Thanks, Jim - 69 Short Step CST 350 AC/PB/PS - 69 Short Step 307 Man Column/PS Last edited by Jimjific; 12-04-2013 at 09:13 PM. Reason: Double Post

12-04-2013, 09:15 PM	#10
Kennuck Registered User Join Date: Oct 2013 Location: Dresden, Ontario Posts: 647	Re: 255/70 R15 Help I like the Rally's I'm going that route too once I get my 5 lug disc brake conversion completed. Attached Images __________________ 1970 Short Wide 5.3 4L60E BlackBear tune 3:73 gears, Boyd's Tank 2.5 / 4 drop 5 lug disc brakes Vintage Air 18x8 Ridlers 255/55 frt. 18x9.5 275/60 rear

12-04-2013, 09:12 PM	#11
Jimjific Registered User Join Date: Aug 2013 Location: Albany, NY Posts: 145	Re: 255/70 R15 Help Here's an image of the one rim I have done. I might want to go with a darker paint color for more contrast. I can't wait to see them on the truck. __________________ Thanks, Jim - 69 Short Step CST 350 AC/PB/PS - 69 Short Step 307 Man Column/PS

12-04-2013, 09:22 PM	#12
guzzidude Registered User Join Date: Sep 2008 Location: SE Coast Posts: 32	Re: 255/70 R15 Help Should have bought from Direct Tire on Cyber Monday. They had 255/70r15 Cooper Cobra Radials for $398 shipped. Today they are up around $500 again. Uggh. Xmas stopped me.

12-04-2013, 09:33 PM	#13
JimboC10 Registered User Join Date: Aug 2013 Location: Beaufort SC Posts: 11	Re: 255/70 R15 Help 255 x .7 = 178.5 178.5 X 2 = 357 357 ÷ 25.4 = 14 14 + 15 = 29 29 inch (approx) diameter This is two sidewalls added to 15 in. wheel to get tire diameter.

12-04-2013, 09:45 PM	#14
Hawghauler Registered User Join Date: Nov 2012 Location: Whidbey Island/Edmonds,WA Posts: 360	Re: 255/70 R15 Help Here's a great place to compare tire sizes. I used them when I went hunting the right size snow tires for my truck. http://ejelta.com/tiresize/index.htm...el=&maxdelta=2 __________________ If I have to be on 4 wheels, It has to be a classic Chevy 1967 c10 Longbed (Hawghauler/Icy weather transport) 2003 BMW K1200GT (Rain bike) 2007 Softail Deuce (Sun bike) 2009 Ultra Classic Electra Glide (Everything else bike)

12-05-2013, 11:20 PM	#15
slow-1 Registered User Join Date: May 2013 Location: Central NC Posts: 830	Re: 255/70 R15 Help I am running that size tires. __________________ 1972 Cheyene C-10 "Ole Green" My Grandfathers truck (early 70's to 1983) My first vehicle (1983) Original 350 (3 rebuilds) 700R4 from Bowtie Overdrives



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