18" Wheels: Tire sizes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

slowcpe · 04-10-2018, 12:29 PM

I've had a set of 18x8/9.5 Ridlers for a few years with 235/55-18 on the front and 255/55-18s on the rear. The fronts at about shot and I've currently got them on my '72 driver. I'm planning on putting a set of 20s on it later this year and the 18s back on my '67 project to roll around the garage in.

I'm finding there is not a whole lot of 18" tires in the 27-29" tall range which I'd like to have since I have a 4.11 rear end. The 255/55s are about 29" tall. A guy at one of the local tire shops has a set of Michelins in 235/60 and 265/60 I can get real reasonable that could get me by until the budget allows for new tires/wheel. The fronts would be about 29.5" tall and rears 30.5" tall.

Anybody running either one of these tires? I'm curious if they would be too tall and look kind of goofy. Truck is getting lower about 4" in the front and 5" in the rear here real soon.

Current setup:

Anybody want to post up pics of your 18s and tire sizes?

**bigmac73** · 04-10-2018, 12:49 PM

The fronts would be about 29.5" tall and rears 30.5" tall

this does not make since to me , you are going to run a 60 series tire all the way around and that means that the sidewall height should be same , just a wider tire in the back

beaterku · 04-10-2018, 12:53 PM

I am running 265/50/18 all around on 18x9's. You are right that there are not a lot of tires in this range. I am possible thinking of going to a slightly shorter tire in the future. Maybe a 45 series tire.

slowcpe · 04-10-2018, 02:07 PM

Quote:

Originally Posted by beaterku

I am running 265/50/18 all around on 18x9's. You are right that there are not a lot of tires in this range. I am possible thinking of going to a slightly shorter tire in the future. Maybe a 45 series tire.

Truck looks good. If I go shorter I probably need to change the rear gear.

RustyBucket · 04-10-2018, 02:52 PM

I bought a set of off brand (CHEAP) 255/55r/18's for the Blazer. 18"x 9" Torque Thrust all the way around. It sits almost level and they fill up the openings pretty well. No rub. So far I'm pleased with them. They're "V" rated and seem to be pretty sticky... wrung my driveshaft off first time I dumped the clutch.

slowcpe · 04-10-2018, 01:06 PM

Quote:

Originally Posted by bigmac73

The fronts would be about 29.5" tall and rears 30.5" tall

this does not make since to me , you are going to run a 60 series tire all the way around and that means that the sidewall height should be same , just a wider tire in the back

The 60 is 60% percent of the width of the tire so a 265/60 would be taller than a 245/60.

**bigmac73** · 04-12-2018, 12:01 PM

Quote:

Originally Posted by slowcpe

The 60 is 60% percent of the width of the tire so a 265/60 would be taller than a 245/60.

There you go reminded something new everyday, i had forgotten that

68Stepbed · 04-10-2018, 05:20 PM

255/45/18 front and 295/45/18 in rear is a good combo.

slowcpe · 04-10-2018, 06:51 PM

Quote:

Originally Posted by 68Stepbed

255/45/18 front and 295/45/18 in rear is a good combo.

I agree but those rear tires are too expensive to put on a cheap set of Ridlers

slowcpe · 04-10-2018, 06:53 PM

Quote:

Originally Posted by Kennuck

255/55/18 front 275/60/18 rear Ridler 18X8 front 18x9.5 rear 2.5/4 drop

Hmm. That looks good.

Quote:

Originally Posted by RodnRudy

Here's a link to a tire size site. Lots of good info here
https://tiresize.com/calculator/

Oh I’ve spent some time there. Lol. Good site.

Kennuck · 04-10-2018, 05:39 PM

255/55/18 front 275/60/18 rear Ridler 18X8 front 18x9.5 rear 2.5/4 drop

**RodnRudy** · 04-10-2018, 06:28 PM

Here's a link to a tire size site. Lots of good info here
https://tiresize.com/calculator/

Custom 68 · 04-12-2018, 03:17 PM

Here is mine
Fronts are 255/55-18
Rears are 285/50-18
9.5 inch wheels

Custom 68 · 04-12-2018, 03:19 PM

I bought these a few years back and had a real hard time finding sizes I liked. These are Toyo Proxy ST2 if I remember correct.

**SIXTY9** · 04-13-2018, 07:12 AM

I bought Master Craft tires, 285-60R-18 for the rear and 265-60R-18 for the front. I only lowered the rear 2" and the front 2 1/2 in the front. This picture is after I removed engine and transmission for paint and rebuild. I did not see any rubbing issues with the front or rear. The wheels are Ridler 18X8 front and rear. Name: IMG_0592.jpg
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Name: IMG_0592.jpg
Views: 5787
Size: 68.8 KB

04-10-2018, 12:29 PM	#1
slowcpe Registered User Join Date: Sep 2013 Location: Evansville, IN Posts: 1,774	18" Wheels: Tire sizes I've had a set of 18x8/9.5 Ridlers for a few years with 235/55-18 on the front and 255/55-18s on the rear. The fronts at about shot and I've currently got them on my '72 driver. I'm planning on putting a set of 20s on it later this year and the 18s back on my '67 project to roll around the garage in. I'm finding there is not a whole lot of 18" tires in the 27-29" tall range which I'd like to have since I have a 4.11 rear end. The 255/55s are about 29" tall. A guy at one of the local tire shops has a set of Michelins in 235/60 and 265/60 I can get real reasonable that could get me by until the budget allows for new tires/wheel. The fronts would be about 29.5" tall and rears 30.5" tall. Anybody running either one of these tires? I'm curious if they would be too tall and look kind of goofy. Truck is getting lower about 4" in the front and 5" in the rear here real soon. Current setup: Anybody want to post up pics of your 18s and tire sizes? __________________ Ryan 1967 Red Stepside..."Laymond" http://67-72chevytrucks.com/vboard/s...40#post6441840 1972 Medium Olive SWB-Chester http://67-72chevytrucks.com/vboard/s...d.php?t=759628 1967/71 Blue SWB C10..SOLD 1977 SWB K10..my grandpa's.....never should have sold

04-10-2018, 12:49 PM	#2
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: 18" Wheels: Tire sizes The fronts would be about 29.5" tall and rears 30.5" tall this does not make since to me , you are going to run a 60 series tire all the way around and that means that the sidewall height should be same , just a wider tire in the back __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

04-10-2018, 12:53 PM	#3
beaterku Registered User Join Date: Mar 2013 Location: Lenexa, KS Posts: 547	Re: 18" Wheels: Tire sizes I am running 265/50/18 all around on 18x9's. You are right that there are not a lot of tires in this range. I am possible thinking of going to a slightly shorter tire in the future. Maybe a 45 series tire. Attached Images __________________ www.rustywrenches.com My 72 SWB build My YouTube channel

04-10-2018, 02:52 PM	#5
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,055	Re: 18" Wheels: Tire sizes I bought a set of off brand (CHEAP) 255/55r/18's for the Blazer. 18"x 9" Torque Thrust all the way around. It sits almost level and they fill up the openings pretty well. No rub. So far I'm pleased with them. They're "V" rated and seem to be pretty sticky... wrung my driveshaft off first time I dumped the clutch. Attached Images __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!

04-10-2018, 05:20 PM	#8
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: 18" Wheels: Tire sizes 255/45/18 front and 295/45/18 in rear is a good combo. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

04-10-2018, 05:39 PM	#11
Kennuck Registered User Join Date: Oct 2013 Location: Dresden, Ontario Posts: 647	Re: 18" Wheels: Tire sizes 255/55/18 front 275/60/18 rear Ridler 18X8 front 18x9.5 rear 2.5/4 drop 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

04-10-2018, 06:28 PM	#12
RodnRudy Senior Member Join Date: Oct 2014 Location: New Palestine In Posts: 932	Re: 18" Wheels: Tire sizes Here's a link to a tire size site. Lots of good info here https://tiresize.com/calculator/ __________________ Phil "Money is only a tool to create and achieve what you want most in life" PayPal: rodnrudy@comcast.net

04-12-2018, 03:17 PM	#13
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: 18" Wheels: Tire sizes Here is mine Fronts are 255/55-18 Rears are 285/50-18 9.5 inch wheels Attached Images __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

04-12-2018, 03:19 PM	#14
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: 18" Wheels: Tire sizes I bought these a few years back and had a real hard time finding sizes I liked. These are Toyo Proxy ST2 if I remember correct. __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

04-13-2018, 07:12 AM	#15
SIXTY9 Senior Member Join Date: Jan 2013 Location: North Charleston SC Posts: 504	Re: 18" Wheels: Tire sizes I bought Master Craft tires, 285-60R-18 for the rear and 265-60R-18 for the front. I only lowered the rear 2" and the front 2 1/2 in the front. This picture is after I removed engine and transmission for paint and rebuild. I did not see any rubbing issues with the front or rear. The wheels are Ridler 18X8 front and rear.



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