.5" really worth it

[mastaofdisasta]

Ill make it quick

Rota slipstream 15x7 - 12.9 lbs

Rota slipstream 15x6.5 -11.9

rota attack 15x6.5- 10lbs

Is the extra .5 inch really worth 4 lbs of unsprung weight?

what would yall go with.

And btw im goin with df210 drop

[kimona]

IMHO, far too much hoopla about a few pounds of unspring weight on this forum.

You're going to drop the car on DF210's. What wheel offset and tyre size are you considering?

[BLAZINBLUEVITZ]

15X5 35MM OFFSET

[mastaofdisasta]

15x6.5 40ish offset.... what do u mean with all caps Blaze?? What tire size is recomended? Im so worried im gonna waste money and messs up my setup. I just want to get it right the first time ><

[BLAZINBLUEVITZ]

WORK

[mastaofdisasta]

hahahahhaha ur like ollie williams, the black weather guy on family guy. Ollie whats the weather look like today? ITS RAININ


SOOOOO 15x6.5 df210 wnt work blaze? ur confus.



http://familyguyvids.net/images/n12804981_30798687_2282.jpg

[scape]

i read somewhere that 1 lbs. of unsprung weight removed from the wheel is equatable to 10 lbs. static weight. so 1 lb. dropped from all wheels would be 40 lbs. removed. I don't think this is very 'scientific' but it is something I ran across from a website; don't take my word for it.

keys to remember are, the wider the tire: more rolling resistance due to more rubber on the road/but better handling in turns due to more grip
the larger the rim in diam.+weight: the more rotational force exists-- easier it is to continue going in a straight line/but harder it is for the tire to change directions.
grab a bicycle and spin the front tire in the air, then turn the handles and see what I mean.
as for rim width, I don't think 6.5 and 7 are much of a difference except extra weight and tire selections...possibly less tire roll, but I doubt that

[BLAZINBLUEVITZ]

no i have those scion wheels which are 15x5 with a 35mm offset i think and i want to put 205/55/15's on them. i was just hijacking your thread.....

[mastaofdisasta]

i read somewhere that 1 lbs. of unsprung weight removed from the wheel is equatable to 10 lbs. static weight. so 1 lb. dropped from all wheels would be 40 lbs. removed. I don't think this is very 'scientific' but it is something I ran across from a website; don't take my word for it.

keys to remember are, the wider the tire: more rolling resistance due to more rubber on the road/but better handling in turns due to more grip
the larger the rim in diam.+weight: the more rotational force exists-- easier it is to continue going in a straight line/but harder it is for the tire to change directions.
grab a bicycle and spin the front tire in the air, then turn the handles and see what I mean.
as for rim width, I don't think 6.5 and 7 are much of a difference except extra weight and tire selections...possibly less tire roll, but I doubt that

Thanks scape, i tihnk im goin with the 15x6.5 best compromise. I doubt the .5 will make muc dif, and itd be nice to save a few lbs. Thanks again buddy good post

[mastaofdisasta]

no i have those scion wheels which are 15x5 with a 35mm offset i think and i want to put 205/55/15's on them. i was just hijacking your thread.....

ooo i dunno the answer to urs but hijack away, in fact u can have it i got my answer lol. I now give this thread to u

[kimona]

15x6.5, ET40, 205/50/15 w/DF210's.

[scape]

np, just some insight I thought about myself-- looking to get new rims too :)
the slipstreams at 6.5 wide are 13 lbs. on some websites...maybe this is a misprint, just wanted to let you know.
I keep going back to wanting buddy club p1 qf, expensive though!

[mastaofdisasta]

i found somne buddy club p1s for 119 each dunno if they are the qf or whatevs and thhey might be used. http://passwordjdm.com/Buddy-Club-P1-Racing-SF-15X65-Gunmetal-P1723C306.aspx

oo they are sf's

[kimona]

i found somne buddy club p1s for 119 each dunno if they are the qf or whatevs and thhey might be used. http://passwordjdm.com/Buddy-Club-P1-Racing-SF-15X65-Gunmetal-P1723C306.aspx

oo they are sf's

15x6.5, ET35... you'll need to run 195 rubber.

[scape]

i found somne buddy club p1s for 119 each dunno if they are the qf or whatevs and thhey might be used. http://passwordjdm.com/Buddy-Club-P1-Racing-SF-15X65-Gunmetal-P1723C306.aspx

oo they are sf's

thanks for the find, not too bad. 13lbs each and decent reputation apparently.

[BLAZINBLUEVITZ]

15x6.5, ET35... you'll need to run 195 rubber.

no 205's? WHY

[HTM Yaris]

Actually ,it will be only 2 lbs of unsprung weight ,since the Yaris only has 2 wheels connected to the drivetrain . The other two wheels would be static weight .

[Loren]

Don't confuse unsprung weight with rotational inertia. Anything hanging from the suspension when the car is raised is unsprung weight.

[HTM Yaris]

Hmm , never thought of it that way .

[Thirty-Nine]

no 205's? WHY

205s have a tendency to rub on lowered vehicles, especially with an offset of less than +40.

[Loren]

Hmm , never thought of it that way .

Sure. "Unsprung weight" effects handling characteristics, less mass for the shocks to have to control when a wheel hits a bump. Rotational inertia (even on the non-drive wheels... they still have to be spun-up) affects acceleration and braking. Wheel and tire inertia also creates a gyroscopic affect that effects the steering feel and it's resistance to turning.

Nothing is ever as simple as it seems.

To answer the OP's question, no, 3-4 pounds isn't worth an extra half-inch of width... on a Yaris. If you NEEDED that extra half inch to fit a 7" wide wheel and stuff something like a 245 under the car, then it might be worth it. But, you can get plenty of tire for a Yaris on a 6.5" wide wheel.

That said, I do have 15x7's on my Yaris! They were cheap and light... $89 and 11 pounds. Generally a good trade-off all-around.

[scape]

thanks for the correction, exactly rotational inertia (not unsprung weight) and the tangent forces coming off the tire as a result.
to be honest, i'm starting to think 15x5.5 or 6 is an even better trade off with a 195x55 compound...who knows, depends on how many G's you wanna try and pull, or percent G's really haha

[thebarber]

id go 15x6.5 w/ 195's

i have that setup now and 195 is PLENTY of rubber....grips like a mofo

[scape]

good to know :D
I have 15" steelies now, I was thinking of buying the 195x55's when I need new tires, with/without the possibility of new wheels. if it all fits well.