64 D100 tire & wheel help

TimLG · Post by **TimLG** » Fri Oct 20, 2006 6:54 am

I'd like to turn a few less rpms at highway speed by using taller tires. I'd kinda like to keep it stock looking, but would consider aftermarket wheels. I have 215/75 M&S radials on stock 15 x 5 rims. I thought about 235/75 but that seems awfully wide on 5" rims. Any suggestions?

Are stock 16" rims/caps hard to find?
Thanks,
Tim G

Post by **Hobcobble** » Fri Oct 20, 2006 7:04 am

Original 5 lug 16" wheels are hard to come by for the
Sweptlines.
John

Roger · Post by **Roger** » Fri Oct 20, 2006 5:35 pm

Tim, I have the 235/75/R 15's on my 65 on the stock 5 inch wheels, they seem to be running fine. It still sounds like its whinning at 60 mph, I don't have a tach. And they really don't look funny.

sireland67 · Post by **sireland67** » Fri Oct 20, 2006 7:22 pm

Hobcobble wrote:Original 5 lug 16" wheels are hard to come by for the
Sweptlines.
John

Are the 5 lug 16" actually that hard to find?
I gave a set of four away about a year ago thinking it should of had 15" on it originally.
I did keep one 16" for a spare and the original hubcaps.

Website · Post by **wideblock** » Sat Oct 21, 2006 4:59 pm

tim, stock tire size converts to a 225/85/15. quite a bit taller then what you have with your 75 series and one size wider. the 235/75 on a stock wheel is just wide enough to rub the steering arm in a tight turn. but, if you aint too stuck on stock, use an 8" rim, 3.75 inches of back space and run a 31/10.5/15 on all four corners. really gives the truck a bull dog stance. BTW, what gear does your truck have out back right now??? might not be a bad idea to look for a better suited gear set if your in the high 3's or low 4's on your ratio

TimLG · Post by **TimLG** » Sat Oct 21, 2006 7:00 pm

Roger,thanks for the input. The truck had 235/75-15 on it when i got it a few years ago, seemed a little too much for the skinny 5" rims.

TimLG · Post by **TimLG** » Sat Oct 21, 2006 7:07 pm

Trey, Data plate shows 3.5 axle, don't think it's been changed. Thanks for the size info, I haven't ruled out the aftermarket wheels. How much braking efficiency do I lose with those 31" tall tires. I've also thought about going the vintage tire route like Coker, but they are kinda salty and bias tires might be a little too vintage for wet handling and braking compared to modern radials. Anyone have experience buying tires from Coker or others?
Tim G

Website · Post by **wideblock** » Sun Oct 22, 2006 11:59 am

i have bought tires from coker. they are usually over priced, and like you said, biased. they suck for the daily grind. i didnt notice any lack of braking in my 66 with the 31's on all four corners. she would still lock them up and come screeching to a stop. but, the same time i did the wheel swap i rebuilt the front end and entire braking system. it was all left stock, but fresh. steering effort didnt increase, braking wasnt inhibited,,,,well, at least as far as i could feel, and i was driving the truck every day. that 3.50 gear is a good all around gear. if you will simply go to an 85 series tire, and loose the 75 series youll be a lot closer to stock size and still in a nice radial. many over the counter manufacturers offer the 225/85's at a very cheap price. right now my truck has 235/85/16's up front and 33/12.5/16.5's out back. so you got some room to play

for now, id stick with the stock wheels and go to the 225/85 possibly even a 235/85, but i believe the 235's will rub the steering arm.

dodgegrrrrrrl · Post by **dodgegrrrrrrl** » Sun Oct 22, 2006 3:07 pm

the taller the tire, the less important the rim width becomes. I have run the 11x16 michelins (37" tall) on the stock 5 or 5.5 inch IH rims. Because the sidewalls are so tall you don't have much of a problem. The one caveat is that handling drops off with a taller sidewall, regardless of the rim width, but more so if the rim is real narrow as the tire rolls over more to the sides and the inside edge of the tread tends to lift as the tire flexes. There are some plusses, too. Think of the sidewall, to rim, to sidewall to tread and across the tread as a trapeziod. as the sides of the trapeziod get taller the angle decreases. With a narrow rim and wide tread you're less prone to sidewall damage from stones, etc. and less likely to peel a bead off in cornering or whe inflation pressures are low.

Website · Post by **wideblock** » Sun Oct 22, 2006 4:29 pm

dodgegirll makes some good points about the width becoming less important as hieght increases. i wanted to add one more point to what i said before also. if your buying a 75 series tire, your more then likly NOT getting a truck rated tire. most over the counter 205-235's that are a 75 series are car tires. softer side wall, less load capability, more likly to not perform under "truck duties". most 15" LT rated tires are 85 series, or a metric measurement like a 30x10.5.

with your gear ratio and a 225/85/15 your looking at 2800rpm at 70mph. the tire measures 30.06 inches tall, a 75 series is only 28 inches. so you can see the advantage to haveing the different series of tire beyond simple wieght capacity. heres a chart to judge where your truck should be running down the freeway, if you look, youll see 2800 is just about perfect for being at 70, at 60mph youll be right around 2300rpm, nice and relaxed.

recommended cruise RPM:
4 cyl 2200-3200
6 cyl 2000-3000
small block 1800-2800
big block 1600-2600
GM diesel 6.2L 1800-2800
Ford diesel (non-turbo) 1600-2500
Ford diesel (turbo) 1400-2200
Dodge diesel 1400-2200

TimLG · Post by **TimLG** » Mon Oct 23, 2006 3:32 pm

Thanks again. I looked at Bridgestone and Michelin web sites to see what sizes are available in 15" didn't see any 85 series. Looks like 30 x 9.5R15/C is the skinniest, tallest, modern tire to use. Can I put LT tires on my rims?

Tim G

Roger · Post by **Roger** » Mon Oct 23, 2006 8:31 pm

Timig, Check the hight and width conversions on the 235/75/15, I think that the width and diameter are the same as the 30x9.5x15C. C is the Loadrange, I know that these also come in B. only the Metric size is a passenger tire and the other is a light truck. the passenger tires I put on my truck are classified as XL, xtra load. I am not planning on hauling, pulling, or off roading it, so I went with the cheaper ones. I think tirerack.com has conversions or inch measurements.
Sometimes getting the look and fitting it without clearance problems can be a very tricky thing. Especially if you're going for a different unproven look.
Have Fun.

Website · Post by **wideblock** » Mon Oct 23, 2006 10:02 pm

a 235/75/15 is 28" and 8.5" wide. conversion would be a 28x8.5. they make a 30x8.50-10.50 i believe in bfg's. closest things i could find to a stock tire thats still sold without going thru some over priced place like coker is a 30x9.5. but these will be too wide to really fit the stock wheel properly and the offset will be wrong to keep them off the steering arm. but heres the results
http://www.tirerack.com/tires/Compare1. ... l&x=62&y=4
the tires that came on the trucks were a 6.5x15 or a 7.5x16 on the 5.5 wheels. theres not much made these days that is that tall and skinny. without newer wheels, and a better ofset, youll have problems getting a tall enough tire since they are also much wider then stock.

TimLG · Post by **TimLG** » Tue Oct 24, 2006 3:56 pm

I found Cooper makes 7.00R15 load range C. You can see them at: http://www.coopertire.com/us/en/selectorSize1.asp
Think they would be too stiff?
Thanks for your advice
Tim

Website · Post by **wideblock** » Tue Oct 24, 2006 6:56 pm

the 7R15 im assuming is a radial. so it wouldnt be that stiff. not like the old biased ply tires. but thats what that truck is supposed to have on it. these might be biased. the super road service tires i have for my crew cab are. mine are load range D, and they are some stiff son of a guns. but, they never wear out, and will haul one heck of a load. biggest problem i had with them was dealing with the flat spot in the tire on cold mornings. took about 15 minutes of driving before it would work its self out and roll smooth. what sucks is it only took me 10 to get to work.

Rodger · Post by **Rodger** » Wed Oct 25, 2006 4:02 pm

Hola Tim

Just below your guestions is a note about a guy who has some stock 19.5 MoPar rims that he is thinking about getting rid of. http://www.sweptline.org/modules.php?na ... pic&t=8978

They are not the old style wheels with rings that may go pop. He is in Mont and the OEM wheels are on a 1968 W200.

Rodger & Gabby
COS

TimLG · Post by **TimLG** » Wed Oct 25, 2006 5:19 pm

Would the 19.5" from a W200 have the same bolt circle as my D100, 5 on 4.5"?

Website · Post by **wideblock** » Wed Oct 25, 2006 7:17 pm

nope, 19.5's are 8 lug. all 200 series trucks are 8 lug.

MountainMoparRobin · Post by **MountainMoparRobin** » Sat Oct 28, 2006 6:30 am

What are you going to use your truck for??? Are you workin it???? or is it pleasure???

here are 17's

TimLG · Post by **TimLG** » Sun Oct 29, 2006 7:40 am

I use it for hauling. Not too often, weekend stuff like lumber, mulch and firewood. That's a nice looking truck you have. I went ahead and sandblasted and painted my stock wheels. Pretty sure I'm going with 7.00-15 6 ply. Local tire store is getting some for me to look at. What do you think of these?http://www.tbcprivatebrands.com/powerki ... asp?id=102
Tim G

Sweptline.ORG

64 D100 tire & wheel help

64 D100 tire & wheel help

5" rims

TIRES