Bad to have rotor not centered in the width of the wheel? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jspaeth · 02-01-2010, 11:10 AM

I have a buddy with an RB swapped 197x 260z.

He currently is running 15xsomething Work meshies in something like -20 offset or so.

He wants to run 13.5 inch rotors up front, but we think that the only way to get this to work, is going to be if the rotors are positioned (via offset and also spacers) very much near the INNER lip of the wheel.

Like if you look at the wheel from the front of the car, the rotor would be way towards the inner lip of the wheel.

Does anyone know of any negative effects/safety issues associated with the rotor/caliper being positioned quite far from the center of the wheel's width?

jspaeth · 02-02-2010, 03:28 PM

Bump....I know someone has something to say about this.

slider2828 · 02-02-2010, 03:32 PM

I would think, just my opinion, that there will be some added stress on the studs as the actualy the wheel is further away from the calipers.... so it really would depend on how far you are spacing the rim outwards.... In road race, usually no more than 10mm spaced outwards from the hubs in which this case the hub will be direct alignment of the rotors.... Also is it going to clear the calipers even though you space it?

I assume you will be spacing way more than 10mm? 15mm?

jspaeth · 02-02-2010, 05:32 PM

I'll try to find out the exact width and offset, but basically, I already know that too much negative offset can put a lot of stress on the wheel studs.

I was just wondering also if there is anything dangerous/unsafe/harmful about the stress of the braking is applied at a point very much towards the inside lip of the wheel....

thanks tho

Def · 02-02-2010, 08:19 PM

Nothing wrong from the brake rotor side of things, but you're definitely going to be increasing the loading on the hub(due to the increased moment arm) from hanging the wheel way out there.

jspaeth · 02-02-2010, 09:10 PM

Quote:

Originally Posted by Def

Nothing wrong from the brake rotor side of things, but you're definitely going to be increasing the loading on the hub(due to the increased moment arm) from hanging the wheel way out there.

Ok I figured as much about the extra torque on the wheel studs bc of moment arm, but i was unsure if the distance from the wheel's center to the point at which the clamping force is being applied could have some sort of effect.

Thank you guys

om3ga · 02-03-2010, 02:58 PM

I would just get wheels that barely clear. Definitely get ARP studs lol.

02-01-2010, 11:10 AM	#1
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Bad to have rotor not centered in the width of the wheel? I have a buddy with an RB swapped 197x 260z. He currently is running 15xsomething Work meshies in something like -20 offset or so. He wants to run 13.5 inch rotors up front, but we think that the only way to get this to work, is going to be if the rotors are positioned (via offset and also spacers) very much near the INNER lip of the wheel. Like if you look at the wheel from the front of the car, the rotor would be way towards the inner lip of the wheel. Does anyone know of any negative effects/safety issues associated with the rotor/caliper being positioned quite far from the center of the wheel's width? __________________ Daily driven

02-02-2010, 03:28 PM	#2
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Bump....I know someone has something to say about this. __________________ Daily driven

02-02-2010, 03:32 PM	#3
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	I would think, just my opinion, that there will be some added stress on the studs as the actualy the wheel is further away from the calipers.... so it really would depend on how far you are spacing the rim outwards.... In road race, usually no more than 10mm spaced outwards from the hubs in which this case the hub will be direct alignment of the rotors.... Also is it going to clear the calipers even though you space it? I assume you will be spacing way more than 10mm? 15mm? __________________ Turn and Burn!

02-02-2010, 05:32 PM	#4
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	I'll try to find out the exact width and offset, but basically, I already know that too much negative offset can put a lot of stress on the wheel studs. I was just wondering also if there is anything dangerous/unsafe/harmful about the stress of the braking is applied at a point very much towards the inside lip of the wheel.... thanks tho __________________ Daily driven

02-02-2010, 08:19 PM	#5
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Nothing wrong from the brake rotor side of things, but you're definitely going to be increasing the loading on the hub(due to the increased moment arm) from hanging the wheel way out there. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

02-03-2010, 02:58 PM	#7
om3ga Zilvia Addict Join Date: Jan 2007 Location: Up and Down! California Posts: 878 Trader Rating: (8) Feedback Score: 8 reviews	I would just get wheels that barely clear. Definitely get ARP studs lol.