can someone link me to a tire lingo site?
Ok im thouroughly confused as to what these numbers mean 245/45/18? and what the frack is offset? I know im an idiot but im trying to learn all this stuff!
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Stock wheel size: 235mm 55% 17"
235mm / 25.4 inches/mm = 9.252" Diameter = 9.252" * 55% * 2 + 17" = 27.177" Your "suggested" wheel size: 245mm 45% 18" 245mm / 25.4 inches/mm = 9.646" Diameter = 9.646" * 45% * 2 + 18" = 26.681" At 60 MPH indicated, true speed = 60 MPH * (26.681"/27.177") = 59 MPH Offset is the distance from the bolt attachment point relative to the centerline of the wheel: https://www.rsracing.com/tech-wheel.html |
Here is an awesome calculator for you as well, which helps you figure out offset, speedo, revs, etc.
http://www.bigcustomwheels.com/rt_specs.jsp |
Originally Posted by mooneyb
(Post 5549735)
Ok im thouroughly confused as to what these numbers mean 245/45/18? and what the frack is offset? I know im an idiot but im trying to learn all this stuff!
45=45% of the 245 is the side wall height from the edge of the rim to the top(outer edge) of the tire...which in this case is: 110.25mm 18=rim size. OFFSET=has to do with the RIM(wheel) backspacing. With the proper backspacing tire won't stick out past the quarterpanel. |
Just to add about offset.
It is hard to explain, but easy to understand with pics. Look at the rear of the tire. Now, take the centerline. Offset is how far (in mm) from the centerline the wheel mounts to the hub. +40 means it is 40mm out from the centerline (more tire is inside the vehicle). |
Originally Posted by Torched05stang
(Post 5550061)
245=TREAD WIDTH IN Milimeters
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I just put 255/45/18 BFG KDW2s on my car.... wish I had gone to 275s.. I wasn't sure how it would look on the wheel.... but in hind sight... I think I would have liked wider. They don't protect the rim even as much as the 255 KDWS tires did. ... If it's of any conulation. now.. a 255/45/18 is the upsize that won't change the outside diameter of your tire enough to throw off your speedo.
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Originally Posted by mooneyb
(Post 5549735)
Ok im thouroughly confused as to what these numbers mean 245/45/18? and what the frack is offset? I know im an idiot but im trying to learn all this stuff!
http://www.stangnet.com/Tech-Article...d-Rims-14.html |
Originally Posted by clintoris
(Post 5550809)
I just put 255/45/18 BFG KDW2s on my car.... wish I had gone to 275s.. I wasn't sure how it would look on the wheel.... but in hind sight... I think I would have liked wider. They don't protect the rim even as much as the 255 KDWS tires did. ... If it's of any conulation. now.. a 255/45/18 is the upsize that won't change the outside diameter of your tire enough to throw off your speedo.
The load index is fine at 99 though. |
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www.bigcustomwheels, as noted by ADRENALIN, will give you visuals as well as written info!
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