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Wheel and Tire data base.


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144 replies to this topic

#141 snomobeelr

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Posted 22 June 2017 - 06:11 AM

The current tire  I have is a 245/60-15 that is 10 inches wide I have 4 inch backspace on that. The rear tire I am looking to get is 11.5 inches wide, a Cooper  295-50-15 Do you guys know if would 4.5 inches of backspace be enough or would I need 5 ? Thank you 



#142 Blackhawk

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Posted 22 June 2017 - 10:54 AM

The current tire  I have is a 245/60-15 that is 10 inches wide I have 4 inch backspace on that. The rear tire I am looking to get is 11.5 inches wide, a Cooper  295-50-15 Do you guys know if would 4.5 inches of backspace be enough or would I need 5 ? Thank you 

This is on 15x8 ralleys or a different wheel?  Stock springs, lowered, jacked up?  A high backspaced 15 inch wheel may have clearance issues with suspension components.



#143 snomobeelr

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Posted 23 June 2017 - 10:08 AM

This would be on  15 x 8 Rally's.  I have Viking shocks all around, I have car above stock height. The rear lower Viking shock mount is pushed away from the wheel about two inches from the stock position. See picture attached. The top mount is basically in stock position. 

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#144 amsterdam84

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Posted 26 June 2017 - 02:12 PM

This would be on 15 x 8 Rally's. I have Viking shocks all around, I have car above stock height. The rear lower Viking shock mount is pushed away from the wheel about two inches from the stock position. See picture attached. The top mount is basically in stock position.


When you say the lower mounting location is pushed 2 inches away from the wheel, does the bracket to mount it do that or did you modify it?
Mike

#145 71gibby

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Posted 17 July 2017 - 07:03 PM

Assuming the backspace on your 15x7 wheels is only 4", I would be very concerned aboout interference with the quarter panel lip (although trimming the lip may get you by).

The outside of the rim on a 15X7 w/4"bs is in the same position as the outside of the rim on a 15x8 w/5" bs, however the centerline of the 10.8" wide tire on a 15x7 rim is moved outboard by at least a half inch and possibly a bit more with sidewall bulge. My 275/60s on 15x8 w/5" bs have less than one inch clearance with the untrimmed quarter panel lip.

I can't imagine the 275/60s working on the front unless you are using at least 2" spacers above stock height. My 255/60 on 15x7 rims (4" bs) actually touched something on tight turns until I installed a 1" spacer in the front coils. The 275 is a full inch taller than a 255 so that is going to eat up an addition half inch of clearance at all points around the circumference of the tire.

The tire clearance may look fine with the wheel straight, but try turning it lock to lock and what looks like abundant clearance quickly goes away (especially if you have any upward suspension travel while the wheel is tightly turned (like turning into an upward sloping driveway).

If it was my money, I would at least try or "buy" them on the condition that they will work on your paticular car.

If you like to play around with different tire and wheel sizes, you might like the Wheel/Tire Size Comparer on the following site: http://www.rimsntires.com/specs.jsp

Note that you can easily enter two different tire/wheel configurations and it will compare the second to the first. Good luck.

VERY helpful Dennis, Thanks for posting the link!






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