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TangoDeltaSierra3

Tyre Sizes on 850

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Can i use 235/45/17s on my 850 T5 without any arch rubbing issues, cheers! :)

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Can i use 235/45/17s on my 850 T5 without any arch rubbing issues, cheers! :)

Hi Craig

I wouldnt go any bigger then 225/40 on the 850's

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This should help http://powerdog.com/ just put in your current tire size and any others you are interested in. No, 235.45.17 will not fit they will rub your bumper, mudflap and arch liner.

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cheers i was hoping to use evo tyres thats all.

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I wouldnt go any bigger then 225/40 on the 850's

Hi Tony,

is that on 18s or 17s though? (or doesn't it matter?)

If you can stick to 7J or 7.5J wide wheels then 225 would be great but if you have to go to 8J to clear your brakes what's a guy to do? I couldn't get a good circumference match with 225 width on a 17"x8J and I felt 225 might be a bit too thin for 8J anyway.

For what it's worth on 17"x8J rims I went for 235/40 to get as close to my previous tyre circumference and sidewall height as I could (17"x7J Volan running 205/45/R17)

I suspect I'm getting some rub at full lock (need to get some C70 steering stops off Rufe) and possibly a little rub when the body rolls and the tyre outer touches the bottom of the plastic arch liner.

HTH, Pete

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Hi Tony,

is that on 18s or 17s though? (or doesn't it matter?)

If you can stick to 7J or 7.5J wide wheels then 225 would be great but if you have to go to 8J to clear your brakes what's a guy to do? I couldn't get a good circumference match with 225 width on a 17"x8J and I felt 225 might be a bit too thin for 8J anyway.

For what it's worth on 17"x8J rims I went for 235/40 to get as close to my previous tyre circumference and sidewall height as I could (17"x7J Volan running 205/45/R17)

I suspect I'm getting some rub at full lock (need to get some C70 steering stops off Rufe) and possibly a little rub when the body rolls and the tyre outer touches the bottom of the plastic arch liner.

HTH, Pete

Hi Pete

I have 225/40/18 on the pegs which are 8J rims and they fit quite well I have even thought about getting 215/40/18 or 225/35/18 when I need new tyres

I have the c70 steering stops and wouldent recomend them as my turning circul is massive (ask irf) so I was thinking if I was to go with the above mentioned tyre sizes then I should be able to refit the smaller steering stops

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The turning circle on a C70 is comical, my Passat estate goes round in 2/3 rds the room the Volvo needs.

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I will need to do the C70 steering stop mod on mine as the wheel arch has been rubbed back to the chassis. How and where do these stops fit?

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I will need to do the C70 steering stop mod on mine as the wheel arch has been rubbed back to the chassis. How and where do these stops fit?

Hiya,

from memory they're riveted with two rivets to the wishbone arm. I believe the ones on my genuine Volvo 850 arm are white plastic and for some reason I think the C70 ones might be blue plastic. I think they're just bigger lumps of plastic so you'll want to drill or chisel off the old rivets and rivet the new bit of plastic in its place.

However, I haven't done it so I might be missing some info :-)

Cheers, Pete

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i know others have had 225/45/17s on their 850 but when i got my first set of 17s with these tyres the front rubbed very badly even in a straight line! obviously to do with the offset of the wheels as well.

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Hi Pete

I have 225/40/18 on the pegs which are 8J rims and they fit quite well I have even thought about getting 215/40/18 or 225/35/18 when I need new tyres

I have the c70 steering stops and wouldent recomend them as my turning circul is massive (ask irf) so I was thinking if I was to go with the above mentioned tyre sizes then I should be able to refit the smaller steering stops

I think that's my problem, finding an equivalent tyre size on a 17" rim was a bit of a nightmare. I had a huge table I made up in Excel, working out best size match and so on then I searched online and found out no-one makes tyres of that exact size :-) I had to go for the next nearest one.

I'll make sure I double check again when it's new tyre time though.

I think I worked out going from 205/45/R17 to 225/40/R17 would be perfect (only -0.7% change) except Camskill claim no-one makes tyres that size :-(

The next best at 225 width that exists was 225/45/R17 but that's 2.8% bigger and I thought that might be too much.

If I went to 235/40/R17 then it's only 0.6% bigger so a great result on circumference but I do think the width might be pushing it on an 850. Other profiles (35 or 45) were over 3% difference in circumference so 40 profile seemed the only 235 width option.

I was also worried about dropping as thin as 215 width, especially with a Pegasus and the risk of curb damage but if you're interested a 215/45/R17 is only 1.4% bigger circumference so pretty good, and a 215/40/R17 (what Irf's running?) is -2.1% change.

Here's a screen shot:

post-360-1221086637_thumb.png

Thanks, Pete

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