New to 75

Cruachan · 23rd July 2019, 17:18

Have recently acquired Rover 75 Con. SE. First registered 1999. In lovely condition inside and out with only 54330 on the clock. On checking the tyre pressures I noticed that the tyres on the front are smaller than the rear. Is this normal?

Snetty · 23rd July 2019, 17:21

Quote:

Originally Posted by Cruachan

Have recently acquired Rover 75 Con. SE. First registered 1999. In lovely condition inside and out with only 54330 on the clock. On checking the tyre pressures I noticed that the tyres on the front are smaller than the rear. Is this normal?

No, a standard car should have the same size all round.

Comfortably Numb · 23rd July 2019, 18:05

They need to be the same size, otherwise the ABS may sense different wheel rotation speed, and register an ABS fault, light will come on, and possibly you'll have no ABS in an emergency.

Cruachan · 23rd July 2019, 18:27

Thank you. But to be more specific the front have 195/65 R15 and the rear 205/65 R15. Strange really. The car has had only two owners and with full service history. Your comments are much appreciated

Dorchester2 · 23rd July 2019, 19:27

Quote:

Originally Posted by Cruachan

Thank you. But to be more specific the front have 195/65 R15 and the rear 205/65 R15. Strange really. The car has had only two owners and with full service history. Your comments are much appreciated

Just the reverse for me.

My 1999 V6 2.5 Connie has got 205/65/15 on the front & 195/65/15 on the back.
All is fine, neither ABS fault nor any warning from the dash. The breaking is efficient and road holding as good as possible either on dry or wet grounds.

Needless to say that tyres are the same on each axle: Goodyear efficient grip performance.

Rover fitted the car with both dimensions from factory and I was told that in this case our French CT (MOT) doesn't care of.
TBH my car was initially fitted with 205 on both axles.
But 205 being 50% more expensive than 195, I'm to go back to 195.
I've already stored the 195 for the front but Goodyear tyres are so good that I can't get them worn!

EDIT: I've forgotten to say that my tyres are always slightly over inflated up to 2.6 kg / 2.55 bars / 37 psi at the front and 2.5 kg / 2.45 bars / 35.5 psi at the back. Checked every fortnight.

Cruachan · 23rd July 2019, 19:51

Thank you for this info Dorchester2. Has put my mind at rest. Will probably do as you will do and fit 195 all round when the time comes. However, my tyres are inflated as per the Rover manual at 30psi front and 28psi rear. Any thoughts on this?

Dorchester2 · 23rd July 2019, 20:05

I'm following as well Rover booklet in French: up to 2.6 kg / 37 psi if driving over 160 km/h (100 mls) or heavily loaded.
Hence that is allowed & doesn't do any harm to the tyres or alloys or anything else.
On the contrary: now on those bl..dy road bumpers my mudflaps are no longer touching the road and even my mechanic told me it was a safe move on our roads deteriorated by potholes & the like.
It preserves the tyres and an over inflated 15" tyre will ever keep more comfort than a normally inflated 17". I can testify to that. But it's up to everybody.

Cruachan · 23rd July 2019, 20:17

Thank you once again. Get the gist!

23rd July 2019, 17:18	#1
Cruachan Regular poster Rover 75 Saloon Join Date: Jul 2019 Location: Lochgilphead Posts: 47 Thanks: 52 Thanked 40 Times in 13 Posts	New to 75 Have recently acquired Rover 75 Con. SE. First registered 1999. In lovely condition inside and out with only 54330 on the clock. On checking the tyre pressures I noticed that the tyres on the front are smaller than the rear. Is this normal?

23rd July 2019, 20:05	#7
Dorchester2 incurable Rover addict Rover 75 Saloon V6 2.5 1999 - Rover 25 1.4 2002 - Rover 214i cab 1994 - Rover P5b coupe 1968 Join Date: Sep 2017 Location: Bioule. South West of France. Posts: 1,643 Thanks: 612 Thanked 385 Times in 223 Posts	I'm following as well Rover booklet in French: up to 2.6 kg / 37 psi if driving over 160 km/h (100 mls) or heavily loaded. Hence that is allowed & doesn't do any harm to the tyres or alloys or anything else. On the contrary: now on those bl..dy road bumpers my mudflaps are no longer touching the road and even my mechanic told me it was a safe move on our roads deteriorated by potholes & the like. It preserves the tyres and an over inflated 15" tyre will ever keep more comfort than a normally inflated 17". I can testify to that. But it's up to everybody. __________________ Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp This vehicle was the 7,517th 75 to run off the production line, out of 112,381 This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214 This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

23rd July 2019, 18:05	#3
Comfortably Numb Posted a thing or two Rover 75 Saloon Join Date: Dec 2017 Location: Penrith Posts: 1,336 Thanks: 165 Thanked 303 Times in 241 Posts	They need to be the same size, otherwise the ABS may sense different wheel rotation speed, and register an ABS fault, light will come on, and possibly you'll have no ABS in an emergency.

23rd July 2019, 18:27	#4
Cruachan Regular poster Rover 75 Saloon Join Date: Jul 2019 Location: Lochgilphead Posts: 47 Thanks: 52 Thanked 40 Times in 13 Posts	Thank you. But to be more specific the front have 195/65 R15 and the rear 205/65 R15. Strange really. The car has had only two owners and with full service history. Your comments are much appreciated

23rd July 2019, 19:51	#6
Cruachan Regular poster Rover 75 Saloon Join Date: Jul 2019 Location: Lochgilphead Posts: 47 Thanks: 52 Thanked 40 Times in 13 Posts	Thank you for this info Dorchester2. Has put my mind at rest. Will probably do as you will do and fit 195 all round when the time comes. However, my tyres are inflated as per the Rover manual at 30psi front and 28psi rear. Any thoughts on this?

23rd July 2019, 20:17	#8
Cruachan Regular poster Rover 75 Saloon Join Date: Jul 2019 Location: Lochgilphead Posts: 47 Thanks: 52 Thanked 40 Times in 13 Posts	Thank you once again. Get the gist!