Won't a shorter offset bring the inside of the rim out, away from the caliper? Seems a greater offset would be more likely for the inside of the rim to hit the caliper 🤔Just be sure to pay special attention to the offset. 40mm on a 17" won't fit, even though it will with an 18" wheel. 45mm is required.
These are actually negative numbers, so they are moving in the opposite direction.Won't a shorter offset bring the inside of the rim out, away from the caliper? Seems a greater offset would be more likely for the inside of the rim to hit the caliper 🤔
So you're talking about a rim with the mating surface inside the centerline.These are actually negative numbers, so they are moving in the opposite direction.
Were those steel rims?I had a 17 snow set when I was up north and it was fantastic.
Yes, width does matter. Offset is measured from the center line of the wheel. So if the wheel is say, 6" wide that would be a total width of 3" on each side with a zero offset. 8" wheel would have 4" on each side of the center line.Still trying to wrap my head around the numbers, but it looks like the fact that the 17" rim is also .5" narrower affects where the rub @ the caliper happens.
OEM 17" part#13463429 does list with a 45mm offset, while OEM 18" part #13463432 lists with a 40mm offset. This coincides with the requirements you posted, but those are alloy rims.
I'm looking for 17" steel rims to mount winter tires on.
Design differences of aftermarket wheels may make it even more complicated to calculate.
Were those steel rims?
If so do you have a part#, source or reference?
I'm not sure how standard the wider section of the inside is distanced from the centerline, though. The centerline is, from what i've seen, is some distance outside that wider rim section, don't see measurements for wider vs. narrower inner diameter sections, and that's what matters as far as clearing the caliper goes, right?.Offset is measured from the center line of the wheel.
not sure what you mean by wider section.
I see what you mean. But there is no standard around that, it's specific to each wheel design.View attachment 46592
In the 1st example, the hub contact line falls in the 'wide' inside area of the rim.
In the 2nd example, the hub contact line falls in the 'narrow' inside area of the rim.
The caliper may fit inside that wide section, but make contact if forced into the narrow section as the wheel is mounted.
Just installed these tires on my 17 GS replacing the original Pirelli's, what a difference smooth and quiet, Pirelli's were noisy and rough. 😉Though I'm still running OE tires at the moment, my favorite tires are the Continental Extreme DWS. Work great in all conditions and look pretty cool too.
...but, as they're 'snow' tires by design & wouldn't last long on summer roads, they're not the "Best replacement tire set" for a Regal outside of winter driving seasons.Cooper Evolution Winter 215/60R17 <- these have been great on our '05 Pacifica for several winters, so i'm going with them on the TourX as well.
- it's my understanding that with 'snow' tires you lose some grip advantage by going with a wider tire at some point, e.g. /75 ratio tire may perform better in snow than /55. I've read they ride up (like wearing snowshoes) rather than digging in.bollox74: "Narrower tires but essentially the same height/sidewall on a 17"