running big rims

smokinstroker · Sep 27, 2011

who here has jumped from an 18" wheel to a 20 or even 22? trying to see if anyone has noticed a large performance loss from the bigger rim?

powerstrokin15 · Sep 27, 2011

went from 18 to 20. lost nothing

6.0dirtworker · Sep 27, 2011

Stock 18 to a 22x12, takes a lot more power to turn. My 12 inch wide rim is tons heavier than my flat 18.

powerstrokin15 · Sep 27, 2011

mine were 18x9s to 20x10s. but i believe my 18" xds were almost as heavy

chappy · Sep 27, 2011

16x8's to 16x12's to 20x12's. If they are aired up then no difference that I noticed.

TyCorr · Sep 27, 2011

Wouldnt it be a trade off if you factor oversized truck tires into the equation? A 37 on an 18 versus a 37 on a 22 cant be too much different in weight. Tires arent exactly light either.

cw96stroker · Sep 27, 2011

TyCorr said:
Wouldnt it be a trade off if you factor oversized truck tires into the equation? A 37 on an 18 versus a 37 on a 22 cant be too much different in weight. Tires arent exactly light either.

That's kind of the way I am looking at it. I went from 16'' stock rims to 20x10s with 35s didnt notice much of a difference, even if it did lose a lil power im not worried about it. But if you are goin to dyno or anything you just swap the smaller tires and wheels back on to get your lil extra hp back.

TyCorr · Sep 27, 2011

cw96stroker said:
That's kind of the way I am looking at it. I went from 16'' stock rims to 20x10s with 35s didnt notice much of a difference, even if it did lose a lil power im not worried about it. But if you are goin to dyno or anything you just swap the smaller tires and wheels back on to get your lil extra hp back.

It seems that to have weight further from the centerpoint of the axlehub is one thing. Id think aluminum would be better, more stable weight to have out there. Think how much rubber is there in a 16" versus a 20 or 22. My vote goes to bigger wheels and less tire for rotational stability.

Daryl@TDP · Sep 27, 2011

I feel like most of the difference is on the tire if any. Toyo mts are heavy bitches.

SouthFlstrokin' · Sep 27, 2011

No the 22 will slow the truck down no doubt. My 16s with taller tires were faster then my 20s

Tonka350 · Sep 27, 2011

16.5x12 on a 38x15.5x16.5 PJ to 24x12 on 37x13.5x24 toyo and noticed a huge loss....

Chad

6.0dirtworker · Sep 28, 2011

It's all about rotational inertia, resistance to change motion. The more mass in an object, the less it responds to being pushed. The outside of a spinning object has to move much faster than the inside part near the axis.

Like we all know, this isn't weight in the bed of our truck, rotating force is on another level. You can still feel the power in my truck with 22s no question. But it takes a lot more to get those tires turning from a dead stop, once there's a motion its a lot more responsive like a stock tire truck. I could roast my tires through the gears on stock tires from a dead stop, now with 22s, they do a long chirp.

I feel like a 4 wheel launch with 22s will bypass that heavy centripetal start up feeling that big rims have, and it'll launch just like stock. I doubt this is making sense since I'm drugged up at midnight, and I usually don't even know what I'm talking about when I'm sober lol.

Dzchey21 · Sep 28, 2011

supposedly adding 1 lb to rotating weight is like adding 7 lbs in the bed of your truck... take it how you like not sure how true it is.

I would thinkin that if the tire size doesnt change too much the wheel tire combo wont change much either.

I know my 37.1350.20 toyo mts weighed 90 lbs each

MINK · Sep 28, 2011

as far as the track goes I ran a 13.02 on stock 17s with 31s then 13.19 with my 33" street tires on 22x10s....diff tracks though but similar weather, the bigger rims are well worth the look.

smokinstroker · Sep 28, 2011

this is what im looking for. the power difference from my 18 with 37 to my 22 with 35 was crazy, the 18s you would burn off the line and the 22s barely chirped

and yes like dustin said the toyo mt i was running weighed in at 81 pounds alone.

TyCorr · Sep 28, 2011

Monstar said:
It's all about rotational inertia, resistance to change motion. The more mass in an object, the less it responds to being pushed. The outside of a spinning object has to move much faster than the inside part near the axis.

Like we all know, this isn't weight in the bed of our truck, rotating force is on another level. You can still feel the power in my truck with 22s no question. But it takes a lot more to get those tires turning from a dead stop, once there's a motion its a lot more responsive like a stock tire truck. I could roast my tires through the gears on stock tires from a dead stop, now with 22s, they do a long chirp.

I feel like a 4 wheel launch with 22s will bypass that heavy centripetal start up feeling that big rims have, and it'll launch just like stock. I doubt this is making sense since I'm drugged up at midnight, and I usually don't even know what I'm talking about when I'm sober lol.

This makes sense. Can you offer up tire sizes for each scenario?

Dzchey21 said:
supposedly adding 1 lb to rotating weight is like adding 7 lbs in the bed of your truck... take it how you like not sure how true it is.

I would thinkin that if the tire size doesnt change too much the wheel tire combo wont change much either.

I know my 37.1350.20 toyo mts weighed 90 lbs each

So a set of 35x13.5/20's should be similar or less than a 37x13.5/16?

MINK said:
as far as the track goes I ran a 13.02 on stock 17s with 31s then 13.19 with my 33" street tires on 22x10s....diff tracks though but similar weather, the bigger rims are well worth the look.

Im thinking the bigger rim would provide better handling and traction. Although slightly heavier.

smokinstroker · Sep 28, 2011

the issue im finding with the bigger rims, is the rotating mass is farther away from the hub (i.e. axis of rotation) its is taking more power to get that rotating due to the distance form the centerpoint, regardless of tire size.