jeep canyon wheel question

[Ray H]

Shouldn't it be 0.25" less clearance with the Canyons? 5.5 BS - 5.25 BS = 0.25 closer to the leaf spring

Not when you figure in the wheel width. The 7" wide wheels have 5.25" BS while the 8" wide wheel has 5.5" BS. My explanation takes into consideration where the center line of each wheel (7" and 8") is. Actually an 8" wide wheel with 5.5" of BS will give you .25" more clearance than a 7" wheel with 5.25" BS but considering the extra "bulge" in the tire on an 8" wheel verses a 7" wheel, it comes out to about the same.

 

[winkosmosis]

Not when you figure in the wheel width. The 7" wide wheels have 5.25" BS while the 8" wide wheel has 5.5" BS. My explanation takes into consideration where the center line of each wheel (7" and 8") is. Actually an 8" wide wheel with 5.5" of BS will give you .25" more clearance than a 7" wheel with 5.25" BS but considering the extra "bulge" in the tire on an 8" wheel verses a 7" wheel, it comes out to about the same.

Backspacing is the distance from the inside lip to the hub mounting surface so if you're talking about clearance for the leaf springs, control arms, etc... that is what matters.

 

[law.74]

Canyons, no spacers and 33 12.5 Bighorns with significant interference at leaf spring... no pics

With spacers...

Now I have other clearance issues... until I trim again

 

[Ray H]

Backspacing is the distance from the inside lip to the hub mounting surface so if you're talking about clearance for the leaf springs, control arms, etc... that is what matters.

It also matters how wide the wheel is because the center line of the wheel is always the center of your tire that is where the center of your tire. Move the center line of the wheel outward, you move the center of the tire outward. If you move the center line of the tire outward, you will have more room behind it.

 

[Hammered]

I'll be selling my 5 canyons once I get my steelies.

 

[winkosmosis]

It also matters how wide the wheel is because the center line of the wheel is always the center of your tire that is where the center of your tire. Move the center line of the wheel outward, you move the center of the tire outward. If you move the center line of the tire outward, you will have more room behind it.

Oh OK I see what you're saying.. The tire will deform to fit the width of the wheel.

 

[Tenny]

A 4.5"BS wheel will stick out an inch "further" than a 5.5"BS wheel.In your pic the top is the part that goes against the drum/rotor!

Ahh Ok, I was completely off!

 

[RCP Phx]

Not when you figure in the wheel width. The 7" wide wheels have 5.25" BS while the 8" wide wheel has 5.5" BS. My explanation takes into consideration where the center line of each wheel (7" and 8") is. Actually an 8" wide wheel with 5.5" of BS will give you .25" more clearance than a 7" wheel with 5.25" BS but considering the extra "bulge" in the tire on an 8" wheel verses a 7" wheel, it comes out to about the same.

You should be comparing the same size tire when you think about this,your "totally off" on the BS issue.My 12.5's on 7" rims have way more "bulge" than when mounted on 8" rims,BS is BS!!!!No "apples" to "oranges" comparisons!A good example would be some "Vato" cars running 5" tires on a 7" rim,they have no "bulge"!Rim width will definately change the offset set "outside" the fender based on the same BS!

 

[beatassXJ]

Quick little tangent...Law.74, what rear bumper is that? looks nice

 

[Ray H]

You should be comparing the same size tire when you think about this,your "totally off" on the BS issue.My 12.5's on 7" rims have way more "bulge" than when mounted on 8" rims,BS is BS!!!!No "apples" to "oranges" comparisons!A good example would be some "Vato" cars running 5" tires on a 7" rim,they have no "bulge"!Rim width will definately change the offset set "outside" the fender based on the same BS!

I mispoke when I said "bulge".
The tire wont seem to "bulge" as much on a wider rim but the cross section of the sidewall is certainly wider when put on a wider rim. Thats really what I meant and isnt it the sidewall that becomes an issue with the leaf springs?
The math backs me up on the BS calculations though.

 

[RCP Phx]

Thats why you have to only compare 1 particular rim/tire size at a time,only "playing" w /BS at that moment.Everything else is "apples to oranges",just start all over with again with different tire/rim sizes and then compare them to each other.

Think about the reverse thought,put a 12.5 on a 5" rim,how much "bulge" will it have.Section width "measurements" are only based on 1 wheel width as advertised!YMMV

 

[Ray H]

Thats why you have to only compare 1 particular rim/tire size at a time,only "playing" w /BS at that moment.Everything else is "apples to oranges",just start all over with again with different tire/rim sizes and then compare them to each other

I just went back and reread your post. i think we agree but Im not sure. Im saying that wheels of different widths but the same BS will set the tire further out if you increase the width or further in if you decrease. Is that what you are saying?

 

[RCP Phx]

Kinda,changing the tire width on the "same" rim also changes the "overall" rim/tire combination(see above examples).
Rim "BS" along with diameter usually impacts things like TRE's,brakes,etc."Overall" effects things like fenderwells,CA's,etc!