If you were buying rota slips (15x6.5 or 15x7)...which would you pick and why?

 

i would buy the 15.7 cuz of obvious reasons. more handles

 

thats what i'm thinking...anyone else

 

I bought the 6.5'' one because it was cheaper and lighter. And I had already ordered my 195/50/15 sp 9000s.

 

the 15x7 would logically seem to have better handling capability, that's what i thought too. but i read an article in which the 15x6.5 had more more g grip than 15x7 because of lateral stress if i recall correctly. when a turn is made the stress is put on the walls of the tire and according to this test the 15x6.5 had a greater contact patch in the end. a google search in traction might be useful as well. this is just something i vaguelyremember reading, but i think it's correct.

 

according to pontiac wider is better! LOL

 

15x7

 

this test was done on a b16 del sol and it was in some car book i randomly picked up at barnes and nobles. the del sol would be a similar vehicle in roughly weight ,size, and also ff. i imagine this question would fare better in the road and track forum. best of luck.

 

7".

There is a marked improvement in feel of a 205/50-15 RT-215 Azenis on the autocross course when going from a 6.5" to a 7" wheel width. I do know know if the RT-615 behave the same way though because I have not tested them yet.

 

thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boylovecar &raquo;</TD></TR><TR><TD CLASS="quote">the 15x7 would logically seem to have better handling capability, that's what i thought too. but i read an article in which the 15x6.5 had more more g grip than 15x7 because of lateral stress if i recall correctly. when a turn is made the stress is put on the walls of the tire and according to this test the 15x6.5 had a greater contact patch in the end. a google search in traction might be useful as well. this is just something i vaguelyremember reading, but i think it's correct.</TD></TR></TABLE>

Interesting ....but not completely true ...with the proper ride height, allignment, and tire size the contact patch would improve on a wider wheel.

Although not everything on a race car can really relate to street driven abilities...they dont run wider tires/rims just because it looks cool.

I'd go 15x7 ....well actually I already did ....huge improvement...alot of it was the tires ....but i've driven pretty hard on the same Azenis on some 15x6.5's ..and you could notice some sway ....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boylovecar &raquo;</TD></TR><TR><TD CLASS="quote">the 15x7 would logically seem to have better handling capability, that's what i thought too. but i read an article in which the 15x6.5 had more more g grip than 15x7 because of lateral stress if i recall correctly. when a turn is made the stress is put on the walls of the tire and according to this test the 15x6.5 had a greater contact patch in the end. a google search in traction might be useful as well. this is just something i vaguelyremember reading, but i think it's correct.</TD></TR></TABLE>

i've never heard anything along these lines before- i'd like to read it if you have the link.

i do know that back to back testing with an appropriate tire (205/50/15 azenis) shows that the 7 is a little faster and feels better.

it really comes down to the tire you're going to run and availability of size/budget, but the quick answer to your question is going to be 7in.