Source officielle MG:
This is a guide to recommended tyres and pressures for all MG TF models.
MGTF Wheels and tyres -(no other arrangements are recommended):
185/55 R15 V Continental Premium Contact fit to 6 x 15 alloy wheels – FRONT only
205/50 R15 V Continental Premium Contact fit to 6 x 15 alloy wheels – REAR only
195/45 R16 Z Goodyear Eagle F1 fit to 7 x 16 alloy wheels – FRONT only
215/40 R16 Z Goodyear Eagle F1 fit to 7 x 16 alloy wheels -REAR only
175/65 R14 T fit to 5.5 x 14 – steel spare wheel only
195/45 R16 Z Goodyear Eagle F1 fit to 7 x 16 – alloy spare wheel
MGTF Tyre Pressures
Normal driving conditions lbf/in bar
195/45 ZR16 (front) – 26 lbf/in ……… 1.8 bar
215/40 ZR16 (rear) – 36 lbf/in ……… 2.5 bar
185/55 R15 V (front wheels only) – 26 lbf/in ……… 1.8 bar
205/50 R15 V (rear wheels only) – 36 lbf/in ……… 2.5 bar
175/65 R14 T (spare wheel only) – 32 lbf/in …….. 2.2 bar
195/45 R16 Z (spare wheel only) – 32 lbf/in …….. 2.2 bar
MGTF Tyre Pressures over 100mph(160km/h) lbf/in bar
195/45 ZR16 (front) -28 lbf/in ……… 1.95 bar
215/40 ZR16 (rear) – 36 lbf/in ……… 2.5 bar
185/55 R15 V (front wheels only) – 28 lbf/in ……… 1.95 bar
205/50 R15 V (rear wheels only) – 36 lbf/in ……… 2.5 bar
WARNING: The spare wheels are for temporary use only, and the car must not exceed 50 mph (80 km/h) with either type of spare wheel fitted.
NOTE: Goodyear Eagle F1 tyres are directional tyres and MUST be fitted in accordance with the direction of rotation shown on the sidewall of the tyre.(except for above)
Autre source, ce coup ci normalement plus pour la F:
1.8 à l'avant, 2 à l'arrière
http://www.mgf.ultimatemg.com/group2/tyres/
PUIS JUSTE POUR RAPPEL, assez intéressant le contenu:
DO NOT FIT GOODYEAR F1 GS-D3 TYRES
F1 GS-D3 tyres Cause Handling Problems
Goodyear F1 GS-D2 tyres have, up until now, been standard fitments on all MGF and MGTF models equipped with 16" wheels. Unfortunately, these tyres have recently become obsolete, and largely superseded by the F1 GS-D3 in most available sizes - including the 215/40 R16 used on the rear wheels of the MGF/TF. This has lead to a distinct shortage of the GS-D2 tyres available from aftermarket outlets, resulting in leading tyre suppliers, such as Micheldever Tyres, only stocking the newer GS-D3. However, it has come to our attention that there are significant handling issues with these tyres, with up to 50% of owners reporting 'dangerous' handling and instability.
Confirmation has come from both MG and Goodyear themselves; neither company will recommend the GS-D3 for use on the MGF/TF.
Part of the problem appears associated with mixing tyres - with many owners keeping the slower wearing GS-D2s on the front and replacing the rears with GS-D3. However, this is not the whole answer to the handling question: owners are also reporting handling problems when using these tyres on all four wheels. No clear pattern has yet emerged as to what causes some cars to have problems, whilst others appear to be fine with GS-D3 tyres.
At this time, therefore, we cannot recommend the GS-D3 tyre for the MGF/TF range. Where possible, try to obtain F1 GS-D2s - these should remain available from MG Rover for the foreseeable future. Failing this, try another brand of tyre - but be sure to use the same brand and model of tyre on all four wheels.
If you need further advice, contact your local MG Rover dealer or MG Rover themselves.