17" RS softline alloy wheels

[hodgo]

Hi guys,

I bought a set of 17" RS softline alloy wheels recently which i am soon to have lightly refurbed and swap over for my existing Estorils. I have taken a look at online offset calculators to understand if i need to fit any spacers to retain the orginial wheel spacing but am unsure i understand correctly. So...

old front = 7" et35
new front = 7.5" et38

Inner clearance: 9mm less
outer clearance: extend an extra 3mm

old rear = 7.5" et35
new rear = 7.5" et38

Inner clearance: 3mm less
outer clearance: retract by 3mm

So...the fronts look ok, actaully wider than standard set up? And the rears would benefit from a 3mm spacer?

Thanks

[rigga]

Think these have been fitted without spacers and any issues, but as all body's don't fit the same on all chassis you might get clearance issues, Swanny didn't have any problems as far as I recall though.

[s p a c e m a n]

I can't remember what the standard offset is but I don't think that it was et35 on both front and rear, where did you get those numbers from?

iirc the fronts are a lower et than the rears.

[rigga]

Standard was 7 inch front 15 inch 25et
Rear 7.5 inch wide 16 inch 35et
Softlines are wider and larger and the last Griffs came with et35 wheels all round 7.5 wide so can't see why these won't fit OK.

[SILICONEKID346HP]

Raceboy bolted them straight on with no problems ,they look very nice .These are diamond cut

[swanny71]

They fit fine, I put them on my old Griff (see profile pic). I needed 10mm spacers on the front but only because it had Tuscan brake calipers.

[macdeb]

From memory, I had some diamond cut RS 17's before and had to fit an 8mm spacer to the front. The tracking will also need looking at.

[Grey Ghost]

I have RS soft alloys on my Chimaera (see profile pic) and they are bolted straight on without spacers. I run 215/40/17 fronts and 225/45/17 rears with no problems. I have had the geo set up correctly since buying the car and am confident in the handling I have.

I might upsize the rears to 245/45/17 when they are due as the Falkens I like are able to fit on a 7.5J rim in this larger size according to their website.

[davetripletvr]

I had to use 5mm spacers on the front as I have cosy 4 pot calipers and they would catch, had geo set-up and all good

[macdeb]

There is an offset calculator knocking about somewhere and from that you can calculate where the wheel will sit on your car. I fitted spacers to the front to bring the outside of the front wheel rims in line with the rears. These cars have enough oversteer without bringing the fronts inwards.
PS; Dave, wish I'd kept them.

[raceboy]

Mine (as shown below ) fitted straight on, I think they catch a little on full lock on the front so could probably do with some small spacers but they have been on a few years now and done a fair few trackdays and seem fine, one day I'll even get round to changing the ditch finders on the front, but as it only goes out in the dry they seem fine

[davetripletvr]

macdeb said:

There is an offset calculator knocking about somewhere and from that you can calculate where the wheel will sit on your car. I fitted spacers to the front to bring the outside of the front wheel rims in line with the rears. These cars have enough oversteer without bringing the fronts inwards.
PS; Dave, wish I'd kept them.

How's it going Mac, just had to have 1 repaired again as some nob in a 4x4 cut me up. Curbed and buckled, repaired A1 now though

[macdeb]

davetripletvr said:

macdeb said:

There is an offset calculator knocking about somewhere and from that you can calculate where the wheel will sit on your car. I fitted spacers to the front to bring the outside of the front wheel rims in line with the rears. These cars have enough oversteer without bringing the fronts inwards.
PS; Dave, wish I'd kept them.

How's it going Mac, just had to have 1 repaired again as some nob in a 4x4 cut me up. Curbed and buckled, repaired A1 now though

Hi Dave, ok thanks, got car stripped trying to decide on wether to keep and turbo or move on Those wheels are the bks and the 18's I now have, have cocked the ride up a bit if I'm honest.

[davetripletvr]

macdeb said:

Hi Dave, ok thanks, got car stripped trying to decide on wether to keep and turbo or move on Those wheels are the bks and the 18's I now have, have cocked the ride up a bit if I'm honest.

What about supercharger route?

[macdeb]

davetripletvr said:

What about supercharger route?

Nah, 'if' I do, it'll be turbo with adjustable boost.
PS; sorry OP, but DO check offsets and get spacers to suit. The wheels as has been said will bolt straight on without obvious issues but think, why did TVR go to the measure of having different wheel offsets for front/rear? If your gonna do it, do it right.

[Andav469]

davetripletvr said:

I had to use 5mm spacers on the front as I have cosy 4 pot calipers and they would catch, had geo set-up and all good

Now those wheels really suit the Yellow Chimaera, hmm, I vowed never to stray from the original Estorils but those could sway my decision!

[macdeb]

Andav469 said:

Now those wheels really suit the Yellow Chimaera, hmm, I vowed never to stray from the original Estorils but those could sway my decision!

look like a factory upgrade.

[OleVix]

macdeb said:

davetripletvr said:

What about supercharger route?

Nah, 'if' I do, it'll be turbo with adjustable boost.
PS; sorry OP, but DO check offsets and get spacers to suit. The wheels as has been said will bolt straight on without obvious issues but think, why did TVR go to the measure of having different wheel offsets for front/rear? If your gonna do it, do it right.

True, a loss of 10-13mm on each side is substantial and will give worse cornering / turn in. Space them out to exact ET... 25 front and 33 rear, independent of rim width

[Quinny]

OleVix said:

True, a loss of 10-13mm on each side is substantial and will give worse cornering / turn in. Space them out to exact ET... 25 front and 33 rear, independent of rim width

Apologies if I'm mistaken but you can't seperate ET from rim width, as they're linked.....

An 8" rim will need an ET of 35, to sit in the same position or as near as dammit to a 7" rim with an ET of 25...

[SILICONEKID346HP]

http://www.1010tires.com/Tools/Wheel-Offset-Calcul...