15x6.5 +15 or 15x7 0 offset?

Suspension, including wheel, tire and brake.
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eastbaysolo_73
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by eastbaysolo_73 »

Sounds like plan " slowerthantime " . Im not the OP but thanks to all who have added there 2 cents. I know this subject has been beaten up quite a bit after doing multiple searches using different keywords. Thanks again fellas.
1970 2 door sr20det cookie cutter build
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eastbaysolo_73
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by eastbaysolo_73 »

Don't know what happened to the post I made yesterday? But here's 15x7 +12 Rota RB on 280zx struts works well. Fender clearance is good also. Tires are 195/45r15 Toyo proves.
+12nospacer.JPG
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1970 2 door sr20det cookie cutter build
My build thread
http://www.the510realm.com/viewtopic.php?f=3&t=30772
Nor Cal Meng !
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icehouse
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by icehouse »

225 45 15 under a stock fender that is lightly rolled. I'm amazed it fit so well. Wish the PO circle track guys wouldn't have cut off the rear arches.


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eastbaysolo_73
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by eastbaysolo_73 »

Dam dude the cage is nuts.
1970 2 door sr20det cookie cutter build
My build thread
http://www.the510realm.com/viewtopic.php?f=3&t=30772
Nor Cal Meng !
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bertvorgon
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by bertvorgon »

Just a word of caution with the tire so close to the strut. If you are cornering hard, keep an eye on the sidewall at that point. Even when I ran race slicks with a finger width of clearance, the tire deflection had the tire hitting the strut. And that was with a cantilever tire with rock hard sidewalls, the friction created enough heat to kinda melt the lettering off the tire..bye, bye GOODYEAR.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2 Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1971 Vintage 13' BOLER trailer
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eastbaysolo_73
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by eastbaysolo_73 »

bertvorgon wrote:Just a word of caution with the tire so close to the strut. If you are cornering hard, keep an eye on the sidewall at that point. Even when I ran race slicks with a finger width of clearance, the tire deflection had the tire hitting the strut. And that was with a cantilever tire with rock hard sidewalls, the friction created enough heat to kinda melt the lettering off the tire..bye, bye GOODYEAR.

Thank for warning Bertvorgon. It will be a while before she's actually running. Still have long list of things that need to be addressed before she actually moves on her own power. Any wiring guys located in Nor Cal?
1970 2 door sr20det cookie cutter build
My build thread
http://www.the510realm.com/viewtopic.php?f=3&t=30772
Nor Cal Meng !
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funwithmonkeys
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by funwithmonkeys »

My tires are a LOT closer to the strut than yours are. I have 2 or 3mm space and I have not seen a mark on any tires yet. I wonder if that was because of the larger sidewall that they were deflecting that much? What size were those tires Keith?
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bertvorgon
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by bertvorgon »

They were 13 " x 20" tall by 9.5 inches wide, with the cantilever sidewall, super stick at the time. Likely moved more than todays tires in reality, just thought I would mention it as something to be aware off, you never know.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2 Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1971 Vintage 13' BOLER trailer
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funwithmonkeys
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by funwithmonkeys »

I'm sure with different tires mine would touch. I was very worried about it when I first put 205's on my car. I'm going to put the gopro looking at a tire for a drive one day and see how much they move.
If no one from the future comes back to stop you from doing it then how bad of a decision can it really be?
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by B^2 »

https://www.instagram.com/p/Bjcx_vtgBYt ... fbarton094


Just got the new wheels/tires, hoping to get them on the car this weekend.
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by Beev »

What was the conclusion for this thread?

I want to run 195 or 205 front and rear and am looking to mount them on 15x6.5. I have a 1969 510, 4 door street car. The front has shortened 510 struts with Specialty Engineering Springs and FutoFab adjustable control arms. The rear also has Specialty Engineering Springs and the crossmember has been modified with Datsport adjustable brackets.

I know a 15 x 6 +12mm with 195/50 works (swastikas) on my setup. Watanabe seems to be suggesting a +25, I would prefer to not run spacers

https://www.rs-watanabe.co.jp/wp-conten ... 0d6c24.pdf

They also have an example of 15 x 7" and a +21 offset running 195 but no idea of the suspension or spacers.

https://www.rs-watanabe.co.jp/tag/%E6%A ... %E8%B1%8A/

I really don't want to get it wrong so the safe non-spacer option for 195/50 on 15 x 6.5 would be fantastic. If there are thoughts on the 205 route sure I am interested but don't forget to share the safe option.
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by Benzo »

Hope this info can help. I just recently did a post about my wheels and I am using 14x6.5 fronts with 14.5mm offset on ZX strut housings with coilovers and 195-60-14 tires and had to use a 5 mm spacer to change the offset to 9.5mm. I didn't use longer studs but can but used extended shank lug nuts which worked out. For the rear I have a wagon and use a 14x7.5 -3.5mm offset wheel with 185-60-14 tires for some stretch but feel a 14x7 0 offset or slightly positive offset would be better to run a more square tire which sounds like you may want to do if you are auto X ing. Since you are looking to use 15's would figure about the same.
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icehouse
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Re: 15x6.5 +15 or 15x7 0 offset?

Post by icehouse »

The rear is the problem. If you run zx struts the rear is even more of an issue. anything 7" or wider needs a positive offset if you want some decent tires without a zillion degrees of camber.
"People don't like it when shit doesn't match their rule of thumb." Sam
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