17” swamper setup with correct rolling radius?

dave_b

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Is it possible to go swamper on 17’s and retain the correct rolling radius?

I have 18” sportlines and considering the change to either swamper look or going 20”.

I would like to keep the speedo and gearing as near as possible to standard.

(102 remapped to 150 with 5sp manual box)

Cheers
 
I’ve read this thread


I should also mention I have STX suspension lowered by about 40mm.

235/65/17 seems to be the go to swamper size.

12A08400-3F92-425D-BEEC-C975EF4F1FF6.png

Makes the gearing quite tall? Is it really noticeable when driving? I don’t tow anything.
 
235/55 R17 is standard rolling radius.

Have a play on willtheyfit.com to compare different sizes.
 
Also, below is a post I made while doing some similar research when I was speccing my 17-inch setup (I went with 235/65 in the end and I love it).

If my tyre size calculations are correct*:

235/60 R17 has a tyre height of ~141mm
225/65 R17 has a tyre height of ~146mm
235/65 R17 has a tyre height of ~153mm
245/65 R17 has a tyre height of ~159mm

For context, standard 16” steels with 205/65 R16s have a tyre height of ~133mm, and standard 17” with 235/55 R17s have a tyre height of ~129mm.

(*Note: My tyre size calculation doesn’t take rim width into consideration - I’m not sure how much difference that makes. I assume not much because I don’t think the output of willtheyfit.com differs based on rim width either.)

@WeeCobi, hope the above info is of some use to you. 235/65 R17s seem to be quite popular. I’ve not seen anyone complain of rubbing on 8.5j ET34 wheel which is similar to the Warlord (which I believe is 8j ET35).

I think the only problem is that the bigger the tyre the more the speedo will be out by (along with any calculations that rely on this, like automatic gearing, MPG calcuations, etc). I believe this can be reconfigured though. And it’ll be out whether you go with 235/60 or 235/65! ;) (You can stick with 235/55 R17 if you’d prefer to keep everything accurate like @SimonJ said above.)

You can see some other 17” wheel/tyre combinations in Show us your 17s too. :thumbsup:
 
Cheers.

Might just opt for standard 17” setup and not worry about the AT tyres.
 
Check out the first van in this post (below) - that's the same drop as you, with standard sized 4-season tyres :thumbsup:

Posted by @SimonJ in Swamper/AT wheels with 4 season tyres:

1647006364365-jpeg.148629


Wheels: 17” Fuel Covert Matt Black wheels
Tyres: Michelin All Season CrossClimate 2 tyres (235 55 R17 103H XL) tyres
Suspension: Lowered 40mm with Twin-Adjust-Projekt Sensitive Comfort T32
 
Yep. I’m just pricing up some OZ Rally Raid 17’s with some Falken or Davanti tyres I’m standard size.

Would like a tiny bit for compliance than the 18’s I have at the moment.
 
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