Rover 75 Tyre Size - Alternatives

Flint · 23rd May 2008, 16:09

Hi Each

What are the alternatives re tyre size for my Rover 75 please?

Currently it has 215/55/16/93H and they need replacing.

I know I can't change the diam (16) but what wider width / profile combination can the wheel arch accommodate without rubbing etc.

If there is already a thread /article with the answers please direct me to it, I did search but could not find much

(PS anybody got any tyres they want to sell cheap?)

Many Thanks
Flint

Simon · 23rd May 2008, 16:27

With regards to changing tyre sizes:

If you are keeping the same rims then you will be limited on choice: Altering the width is pretty much out of the question as they wont fit your existing rims. Varying the profile is possible but would affect the readout on your speedometer. (Lower profiles = firmer ride, more 'feedback' from the road. Higher profile = plusher ride, more prone to deformation when pushed to the limits during cornering, less feedback in some cases)

You can keep the overall wheel size (16") by varying the rim and tyre profile accordingly. All 75's had the option of fitting 17" wheels so you could fit larger rims and put smaller profile tyres on to keep the speedometer readout normal. Otherwise you will need to re-calibrate it. All 75's/ZT's will take 18" wheels. The ZT standard wheel spec are 245/45/ZR18

David3807 · 23rd May 2008, 17:09

Notice you have H rated tyres already.

Just had a quick look at my handbook and seems that tyres for the 16 inch wheel should be W rated.

Duotone · 23rd May 2008, 20:30

Quote:

Originally Posted by Simon

With regards to changing tyre sizes:

You can keep the overall wheel size (16") by varying the rim and tyre profile accordingly. All 75's had the option of fitting 17" wheels so you could fit larger rims and put smaller profile tyres on to keep the speedometer readout normal. Otherwise you will need to re-calibrate it. All 75's/ZT's will take 18" wheels. The ZT standard wheel spec are 245/45/ZR18

Simon..
Both the Rover 75 and MG ZT when fitted with 18" wheels the tyre size is 225/45/R18. Even the V8 models have this size.
Some members have fitted 225/40/R18 owing to them being a bit cheaper with no noticable difference in speedo readouts.
The 16" wheels were fitted with 215/55/R16 and the 17" with 215/50/R17

Dave T

Lates · 23rd May 2008, 21:06

Used this link in the past but does not like my pc at the minute

http://www.miata.net/garage/tirecalcold.html

Simon · 23rd May 2008, 21:57

Quote:

Originally Posted by Duotone

Simon..
Both the Rover 75 and MG ZT when fitted with 18" wheels the tyre size is 225/45/R18. Even the V8 models have this size.
Some members have fitted 225/40/R18 owing to them being a bit cheaper with no noticable difference in speedo readouts.
The 16" wheels were fitted with 215/55/R16 and the 17" with 215/50/R17

Dave T

Ahh, my mistake on the tyre size. 225 and 245, similar numbers when speed-reading elsewhere

Flint · 24th May 2008, 11:09

Hey Guys

Thanks for the replies, all good stuff.

David, thanks for pointing out the incorrect rating (H) previous owner obviously fitted the wrong / cheaper type.

On average, about how many miles do tyres on a 75 Club 1.8 do? I know it depends on 'this that and the other' but on average ... like about 25K or whatever?

I guess you guys who've had 75s from new will know?

Cheers
Flint

David3807 · 24th May 2008, 11:21

Contis 195/65/15 V lasted about 28k miles on my V6 2.5 Auto Saloon. Put a new set on soon after I bought it if thats any help.

Dont tend to corner on the door handles though so much will depend on your driving style.

Flint · 24th May 2008, 21:39

Hi

I've not got an Owners Manual so could any kind soul tell me if I need XL rated tyres for my 75 Club 1.8 Turbo?

Also could you confirm the correct tyre size ... currently, I've got 215/55/16 on the front and 225/55/18 on the back!!

Cheers
Flint

Lates · 24th May 2008, 22:40

You have a mix of 16 & 18 inch rims ?

23rd May 2008, 16:09	#1
Flint Newbie Rover 75 Saloon Club 1.8 Turbo 03 Reg 37K Join Date: Apr 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts	Rover 75 Tyre Size - Alternatives Hi Each What are the alternatives re tyre size for my Rover 75 please? Currently it has 215/55/16/93H and they need replacing. I know I can't change the diam (16) but what wider width / profile combination can the wheel arch accommodate without rubbing etc. If there is already a thread /article with the answers please direct me to it, I did search but could not find much (PS anybody got any tyres they want to sell cheap?) Many Thanks Flint

24th May 2008, 21:39	#9
Flint Newbie Rover 75 Saloon Club 1.8 Turbo 03 Reg 37K Join Date: Apr 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts	XL Rated Tyres Hi I've not got an Owners Manual so could any kind soul tell me if I need XL rated tyres for my 75 Club 1.8 Turbo? Also could you confirm the correct tyre size ... currently, I've got 215/55/16 on the front and 225/55/18 on the back!! Cheers Flint

23rd May 2008, 16:27	#2
Simon Banned - Join Date: Nov 2006 Location: - Posts: 10,318 Thanks: 0 Thanked 4 Times in 3 Posts	With regards to changing tyre sizes: If you are keeping the same rims then you will be limited on choice: Altering the width is pretty much out of the question as they wont fit your existing rims. Varying the profile is possible but would affect the readout on your speedometer. (Lower profiles = firmer ride, more 'feedback' from the road. Higher profile = plusher ride, more prone to deformation when pushed to the limits during cornering, less feedback in some cases) You can keep the overall wheel size (16") by varying the rim and tyre profile accordingly. All 75's had the option of fitting 17" wheels so you could fit larger rims and put smaller profile tyres on to keep the speedometer readout normal. Otherwise you will need to re-calibrate it. All 75's/ZT's will take 18" wheels. The ZT standard wheel spec are 245/45/ZR18

23rd May 2008, 17:09	#3
David3807 Posted a thing or two 2002 R75 Conn SE 2.5l Auto Tourer, 2001 R75 Conn SE 2.5 Auto Saloon Join Date: Nov 2006 Location: Gravesend Posts: 1,897 Thanks: 0 Thanked 2 Times in 2 Posts	Notice you have H rated tyres already. Just had a quick look at my handbook and seems that tyres for the 16 inch wheel should be W rated.

23rd May 2008, 21:06	#5
Lates This is my second home Jaguar XE Join Date: Nov 2006 Location: Coventry Posts: 4,321 Thanks: 56 Thanked 59 Times in 55 Posts	Used this link in the past but does not like my pc at the minute http://www.miata.net/garage/tirecalcold.html

24th May 2008, 11:09	#7
Flint Newbie Rover 75 Saloon Club 1.8 Turbo 03 Reg 37K Join Date: Apr 2008 Posts: 22 Thanks: 0 Thanked 0 Times in 0 Posts	Hey Guys Thanks for the replies, all good stuff. David, thanks for pointing out the incorrect rating (H) previous owner obviously fitted the wrong / cheaper type. On average, about how many miles do tyres on a 75 Club 1.8 do? I know it depends on 'this that and the other' but on average ... like about 25K or whatever? I guess you guys who've had 75s from new will know? Cheers Flint

24th May 2008, 11:21	#8
David3807 Posted a thing or two 2002 R75 Conn SE 2.5l Auto Tourer, 2001 R75 Conn SE 2.5 Auto Saloon Join Date: Nov 2006 Location: Gravesend Posts: 1,897 Thanks: 0 Thanked 2 Times in 2 Posts	Contis 195/65/15 V lasted about 28k miles on my V6 2.5 Auto Saloon. Put a new set on soon after I bought it if thats any help. Dont tend to corner on the door handles though so much will depend on your driving style.

24th May 2008, 22:40	#10
Lates This is my second home Jaguar XE Join Date: Nov 2006 Location: Coventry Posts: 4,321 Thanks: 56 Thanked 59 Times in 55 Posts	You have a mix of 16 & 18 inch rims ?