Will 235 or 245 on 18 x 8s rub?

[Nedbone]

I have purchased these wheels for my MY09 2.0 TSI Jetta with the std (GTI) suspension:

18" LM SILVER WHEELS RIMS FIT VW JETTA 2011+ | eBay

and fitting them with 235 x 40 profile tyres or 245 x 40, if they have clearance.

The wheels are offset +45 and the suspension has not been lowered, so does anyone foresee any clearance problems with this combination?

'Diesel_vert', your input would be greatly appreciate

[dylan8]

any reason to do those sizes?
I would just stick to 225/40 or 235/40 max for rolling diameter reasons

[Nedbone]

Hi Dylan,
I did a comparo on this website: Custom rims, wheel tire packages for your ride - RIMSnTIRES.com and there's not much difference in the rolling circumference or cost, but the footprint is wider. The car currently has 225 x45, 17's and thought going a little wider would be OK as long as there's no rubbing anywhere. Comments please?

[dylan8]

yeah width is all good. means more traction.
just the rolling dia which effects the speedo and acceleration. also looks stupid from a bigger side wall when going up to something like 245/40 imho

[Diesel_vert]

IMO, there is a very good chance that fitting a 245/40 R18 tyre on a 8.0 J x 18 wheel will rub. Using a 235/35 R19 tyre on a 8.0 J x 19 wheel as a reference point (as fitted to a Golf VI R, which in itself is a big fitment - you get conflicting reports of rubbing even though it's a factory option), a 245/40 R18 tyre is both wider and taller by a further 7 mm and 5 mm respectively.

I agree with dylan8. Your best bet would be to fit 235/40 R18 tyres. They virtually have the same width and a slightly smaller diameter as our reference tyre, which I don't think we want to go beyond without modifications (unless you're aiming for a show car or gentle cruiser).

In regards to speedo deviation, a 245/40 R18 tyre will reduce the speedo reading by 3.0 km/h at a speed of 100 km/h, a 235/40 R18 tyre by 1.7 km/h, and a 225/40 R18 tyre by 0.5 km/h (all compared to a 225/45 R17 tyre).

A great reference table on what fits, and what doesn't fit, is available at the American-based GolfMkV Forums, here.

[Nedbone]

Thanks for your input Diesel_vert, it seems that 235 x 40 are the go and shouldn't rub, that link you posted from the US based Golf MkV Forums is really informative, I'm saving a copy of that one.... If I do get rubbing with the 235's I'll have to get some 5mm spacers which should fix the problem.
Dylan, thanks also for your input.

[dylan8]

no worries.
cant say iv checked... but id imagine the 235s would be cheaper in AUS...?

[jazd]

I've had 235x40 on my 18x8 +45 rims and they rubbed in the back over heavy bumps at speed or when people were in the back. They were Dunlop Direzza Star Specs.

[Nedbone]

Thanks for your input jazd, I was wondering if the rear wheel area where the tyres rub would be similar on the Golf and the Jetta, maybe some learned person on the forum would know.

Dylan, I was considering these tyres : [4 Tyres] 235/40R18 95W Achilles ATR Sport - [Melbourne] Australia Wide Freight | eBay , they get quite good reviews and the price is right, what do you think?