Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > 700/900 Series General

Notices

700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

Largest tyre size without modification

Views : 1292

Replies : 9

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Mar 10th, 2018, 13:19   #1
855 tdi
Master Member
 
855 tdi's Avatar
 

Last Online: Dec 19th, 2022 19:47
Join Date: Feb 2013
Location: Crawley
Default Largest tyre size without modification

What's the largest tyre anyone has fitted to 15" steel wheels? Anyone done bigger than 205/65/r15 without changing anything, i'm aware it'll affect the speedo reading.
__________________
Amateur having a go.

Volvo 855 TDI 228,000M (sold) Volvo V70 2.5D 218,000m (sold)
Volvo 745 GLE 129,000M (Tankenstein) Volvo 940 SE HPT 115,000M
855 tdi is offline   Reply With Quote
Old Mar 10th, 2018, 16:11   #2
Casheye
Senior Member
 

Last Online: Mar 10th, 2024 09:53
Join Date: Jan 2016
Location: Hayle
Default

What's the width of the wheel?
Casheye is offline   Reply With Quote
Old Mar 10th, 2018, 19:33   #3
855 tdi
Master Member
 
855 tdi's Avatar
 

Last Online: Dec 19th, 2022 19:47
Join Date: Feb 2013
Location: Crawley
Default

Quote:
Originally Posted by Casheye View Post
What's the width of the wheel?
Not 100% but they are fairly slim so I expect 6j, look the same width as my omega alloys.
__________________
Amateur having a go.

Volvo 855 TDI 228,000M (sold) Volvo V70 2.5D 218,000m (sold)
Volvo 745 GLE 129,000M (Tankenstein) Volvo 940 SE HPT 115,000M
855 tdi is offline   Reply With Quote
Old Mar 11th, 2018, 08:49   #4
Casheye
Senior Member
 

Last Online: Mar 10th, 2024 09:53
Join Date: Jan 2016
Location: Hayle
Default

Then anything larger than about a 205 on a 6J wheel probably isn't a great idea. It's more about the appropriate angle of the side wall of the tyre. I think you'd have to look at 4X4 tyres which have a thicker tread to the edge of the tyre which would probably give you slightly more width.

You could always band your steels and then the tyre size is only limited to what you can actually buy. I don't think you'll get more than a 225 in a 15 inch tyre though unless you look at drag radials and then you're only limited to summer driving :P

I think you'd have to go up to a 16 inch to get tyres around 245.
Casheye is offline   Reply With Quote
The Following 2 Users Say Thank You to Casheye For This Useful Post:
Old Mar 11th, 2018, 14:28   #5
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 13:32
Join Date: May 2012
Location: Lakenheath
Default

If you download the "Speedy" app for your phone Jason, you'll probably find the 205/65/15 have corrected the original speedo error and it actually reads correctly or maybe a smidge under at the important speeds, 30, 40, 50, 60 and 70 mph so you may need to do nothing about the speedo error.

http://appcrawlr.com/android/speedy

Another useful thing is the tyre size calculator from etyres - other companies have their own version, i find the etyres one easiest to use :

http://www.etyres.co.uk/how-to-change-your-tyre-size/

You need to scroll down a bit to find it. Put the original tyre size into the left had bit (195/65/15 is usually the default size) and enter the size you're thinking of in the right and it tells you how close the new size is to the original size.
If your speedo reads say 10% fast on 195/65/15s then you'll gain 2.2% of that back with the 205/65/15 tyres. I had 195/60/15s on mine when i got it (all fairly worn but legal) and my speedo was reading about 7-8% fast. Now with a new set 0f 195/65/15s it's about 3% fast.

Give that app a go, you'll find it's pretty useful if you're trying to work things out.
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is online now   Reply With Quote
The Following 2 Users Say Thank You to Laird Scooby For This Useful Post:
Old Mar 11th, 2018, 19:35   #6
bob12
bob12
 

Last Online: Yesterday 12:25
Join Date: Aug 2006
Location: Woking
Default

All this speedo chatter depends on how accurate your speedo is in the first place. If you have rebuilt it name your number if the needle has not been set quite right! I find my sat nav is a far better gauge than my tyre size ... when it seems to keep bleeping at me
bob12 is offline   Reply With Quote
The Following User Says Thank You to bob12 For This Useful Post:
Old Mar 11th, 2018, 20:20   #7
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 13:32
Join Date: May 2012
Location: Lakenheath
Default

That's why i suggested downloading that app Bob - it's a GPS speedo so gives a benchmark.

There are technical limitations to GPS speedos though, they assume the earth is flat so if you're going down (or even up) a steep hill, the speed could be pretty different to what the GPS reads.
Think about an Iscosceles triangle, the point of the triangle being the satellite and the two base corners being the start and finish positions - that is how the GPS speedo sees things with the car on a paper map with no contours. Factor in the slope and the speed could well be different!
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is online now   Reply With Quote
Old Mar 14th, 2018, 16:34   #8
willvg95
Senior Member
 
willvg95's Avatar
 

Last Online: May 13th, 2021 22:00
Join Date: Oct 2015
Location: Chesterfield
Default

i use 205 60 15s on the project, loads of room with them, thats a 6.5j wheel, offset corrected to ET18

as far as i know, you can get 225/50/16 to fit, but the fronts scrub at full lock, cant confirm though,
willvg95 is offline   Reply With Quote
The Following User Says Thank You to willvg95 For This Useful Post:
Old Apr 27th, 2018, 00:47   #9
Skyedriver
Master Member
 

Last Online: Oct 31st, 2023 22:23
Join Date: Aug 2007
Location: Oban
Default

On the 16 inch diameter wheel, the recommended tyre size is 205 x 55 x 16
Has anyone tried going up to a 60 profile?
Skyedriver is offline   Reply With Quote
Old Apr 27th, 2018, 01:15   #10
classicswede
Trader Volvo in my veins
 
classicswede's Avatar
 

Last Online: Today 00:48
Join Date: Dec 2004
Location: Anglesey
Default

Not gone wider than 205/60/15 on 15 inch wheels but on 17's running 225/50/17 with no clearance issues
classicswede is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 13:35.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.