Carlston

The Fabia MK2 was based on the PQ24 platform just like the Fabia MK1. The Polo, Ibiza, and A1 that used the bigger 215/40R17 tyre size were based on the later PQ25 platform.

185/60R15 on a 6Jx15 ET38 rim is a standard Fabia MK3 size. 6Jx15 ET38 5/100 57.1 steel rim https://www.mytyres.co.uk/rims/details?vehicleId=800108564218651748&rimCode=ALCAR7760 6Jx16 ET35 5/100 57.1 steel rim https://www.mytyres.co.uk/rims/details?vehicleId=1206402299938436196&rimCode=ALCAR6664 195/50R16 has a similar outside diameter to the standard Fabia MK3 tyre sizes, and could be used on a 6Jx16 ET35 rim from the Scala/Kamiq. The 195/55R15 is not a Fabia MK3 size. 195/55R15 has an outside diameter 1.4% smaller than 215/40R17. However, it could be used as a spare but 185/60R15 has a closer outside diameter to the standard Fabia MK3 tyre sizes.

If you're purchasing aftermarket, 171698447B still tends to link to the same parts as 171698447A.

4 N 90329105 socket head bolt with hexagon socket head M8X49 2 5 N 90329206 socket head bolt with hexagon socket head M8X59 2 My local bolt supplier sells M8x50 cap head bolts zinc plated for 50p each and M8x60 for 60p each, and these are the very highest 12.9 tensile strength ones. If you want plain black ones it's even cheaper. 25p and 33p each. Still 12.9 tensile strength. Cap head M8 bolts use a 6mm allen key.

My ebay link is from the same seller that the OP linked to, and should be the correct kit. The "ERT 410082" kit on autodoc is listed as compatible with OEM part number 171698447A which is the important "guide bushes" part. The bolts and guide sleeves are made in one piece rather than two. However, I've removed the link just in case it doesn't fit.

171615221 2 171 615 221 guide sleeve 45MM 2 171615221A 3 171 615 221 A guide sleeve 35MM 2 171698447A 16 171 698 447 A 1 set: guide bushes 2 https://skoda.7zap.com/en/cz/fabia/fab/2006-453/6/615-615015/#16 Front Caliper Guide Slider Pin Kits (239mm) For Skoda Fabia 1.2 (2000-2007) £9.49 for one kit, or £17.08 for two kits https://www.ebay.co.uk/itm/333980544148

As you are running Skoda "lowered ride height" springs, ie. 5Q0411105HE front and 3Q0511115AC rear, you could change to the slightly stiffer 5Q0411105HF (about 5% stiffer) or 5Q0411105HG (about 10% stiffer) "lowered ride height" front springs, and 3Q0511115AD (about 5% stiffer) "lowered ride height" rear springs. 5Q0411105HE "lowered ride height" front springs https://www.autodoc.co.uk/car-parts/oem/5q0411105he?search=OEN 5Q0411105HE&supplier[0]=112 5Q0411105HF "lowered ride height" front springs (about 5% stiffer) https://www.autodoc.co.uk/car-parts/oem/5q0411105hf?search=OEN 5Q0411105HF&supplier[0]=112 5Q0411105HG "lowered ride height" front springs (about 10% stiffer) https://www.autodoc.co.uk/car-parts/oem/5q0411105hg?search=OEN 5Q0411105HG&supplier[0]=112 3Q0511115AC "lowered ride height" rear springs https://www.autodoc.co.uk/car-parts/oem/3q0511115ac?search=OEN 3Q0511115AC&supplier[0]=112 3Q0511115AD "lowered ride height" rear springs (about 5% stiffer) https://www.autodoc.co.uk/car-parts/oem/3q0511115ad?search=OEN 3Q0511115AD You might have a job finding Eibach sports springs that give you a suitable stiffness and ride height for a Superb MK3 4WD estate that is going to be used for towing.

An update on my current thoughts. I think you should fit the rear 3Q0511115AB (+20% stiffness) "lowered ride height" spring first, and then see how much the front end needs lowering. The equivalent VW Passat 2.0TDI FWD DSG estate uses 5Q0411105CH front springs, as it is set up to give a slightly more sporty ride. If you use this 5Q0411105CH front spring it should drop your front end by about 10mm to 15mm. MartiniB found that he had to fit longer front springs when he fitted Eibach sports springs, to prevent the front looking lower than the rear. I would advise against fitting anti roll bars until you have finished fitting satisfactory springs and possibly new shock absorbers depending how your current shock absorbers perform with the new springs. After than, you might find that your car is no longer floaty, boaty, and doesn't need stiffer anti roll bars. One problem with stiffer anti roll bars is that they make going over partial speed humps harder when they kick just one wheel up at a time. Another problem, is that it might not be easy to decide exactly what anti roll bars to fit. The Skoda parts catalogue doesn't make it clear exactly what the hierarchy of the anti roll bars are. It looks like the Superb MK3 4WD 280HP uses slightly stiffer front anti roll bars than the lower powered FWD cars. After you fit the 3Q0511115AB rear springs, can you put a side photo up of your car, so we can work out if the front needs to be lowered by 10mm to 15mm, or 30mm? If 30mm, then springs shorter than 5Q0411105CH (from the Passat B8) would be needed. In the link below for the 5Q0411105CH front Passat B8 spring, notice that the Eibach R20796 is listed at 311mm, the Sachs 993 931 is listed at 307mm, and the KYB RA1343 is listed at 302mm. These springs will often be a little different to the length that they are listed at, so the KYB won't necessarily be 9mm shorter than the Eibach. They might turn out to be a similar length, but you just don't know until you measure them yourself. 5Q0411105CH (from the Passat B8) (claimed length 302mm to 311mm) https://www.autodoc.co.uk/car-parts/oem/5q0411105ch?search=OEN 5Q0411105CH&supplier[0]=85&supplier[1]=32&supplier[2]=112&supplier[3]=85&supplier[4]=32&supplier[5]=112 Eibach R18812 sold to replace 5Q0411105HF (length 282mm, wire diameter 12.5mm) https://www.autodoc.co.uk/eibach/17876012 If the 5Q0411105CH is too long, the Eibach R18812 sold to replace 5Q0411105HF looks like a good choice. Although, this spring doesn't appear to be any stiffer than your current front spring. Because you are going for a much stiffer rear spring, maybe 5Q0411105HG would be a better choice as it's a little stiffer than 5Q0411105HF.. Eibach R14665 sold to replace 5Q0411105HG and 5Q0411105HH (length 287mm, wire diameter 12.75mm) https://www.autodoc.co.uk/eibach/17875999 Also, it looks like the 5Q0411105HG is the stiffest "lowered ride height" front spring listed in the Skoda parts catalogue for the Superb MK3. Bearing in mind, that someone mentioned that the Sportline springs are soft, this stiffest in the range "lowered ride height" front spring might give you the stiffness that you want and be a good match for your 3Q0511115AB rear spring.

How about fitting Eibach R19441 "standard ride height" front springs that are sold to replace 5Q0411105GN, and matching them with the Eibach R21706 "standard ride height" rear springs that are sold to replace 3Q0511115P. 5Q0411105GN Front coil spring L08 https://www.lllparts.co.uk/catalogs/skoda/CZ/SUP/851/4/411/411000 3Q0511115P Rear coil spring 1JA+0YG https://www.lllparts.co.uk/catalogs/skoda/CZ/SUP/851/5/511/511005 With towing, it's probably best to have plenty of rear suspension travel. As you currently have factory fitted "lowered ride height" springs, you might find that one or both of your anti roll bars are upgraded over standard, ie. stiffer. So although you would be changing to standard ride height springs, you might still have a sportier suspension setup compared to standard ride height. I haven't confirmed this, so you might want to check this out.

Just to add to my previous suggestion that the "lowered ride height" rear springs for the Superb MK3 2.0TDI 150HP FWD DSG estate should be either 3Q0511115AA or 3Q0511115AB. "Bigeater" on another thread has a Superb MK3 2.0TSI 280HP 4WD estate "lowered ride height" with 3Q051115AC rear springs (and 5Q0411105HE front springs). Now not only does the 280HP have a lot more power than 150HP, but being a 4WD it has considerably more weight over the rear axle. This confirms my thoughts that the choice of rear springs with "lowered ride height" should be made from 3Q0511115AA or 3Q0511115AB. Many people who stiffen up their cars make a beginners' mistake of overdoing things, such as choosing springs and anti-roll bars even stiffer than the already stiff Golf R. One guy even commented that he had fun in his car that he stiffened too much for a year, but then the novelty wore off and he was left with a car that was simply too stiff and uncomfortable. Maybe think about the Mazda MX-5 and how that is set up. It has never been a very stiff sports car, but it is fun and dynamic with the right balance of stiffness and suppleness. Another important point, is if you are going to use the standard shock absorbers they might not provide enough damping for springs that are much stiffer. Perhaps look next at RARB (Rear Anti Roll Bar), maybe from the Superb MK3 4WD 280HP. I would do one thing at a time and carefully assess each stage before deciding on the next one. So first slightly stiffer rear springs, and then slightly stiffer RARB. Then you can decide how much to drop the front to match the rear, and the stiffness of the front spring...and then whether a stiffer front FARB (Front Anti Roll Bar). However, I doubt the FARB will be necessary if all the other modification so far have provided the car with a nice balance. Before even considering a FARB, I would be looking at the shock absorbers. Are they working well and would new ones provide improved performance, etc.

Most of the below eleven "lowered ride height" rear springs are not available aftermarket. However, weight range 3 (0YC) to weight range 6 (0YF) "lowered ride height" rear springs are available. I suggest you try the weight range 3 (0YC) or 4 (0YD) "lowered ride height" rear springs first, because the two stiffest springs might make the car feel like an empty transit van, ie. far too hard. The weight range 3 (0YC) "lowered ride height" rear springs are about 10% stiffer than your current 3Q0511115AL. The weight range 4 (0YD) "lowered ride height" rear springs are about 20% stiffer than your current 3Q0511115AL. The weight range 5 (0YE) "lowered ride height" rear springs are about 30% stiffer than your current 3Q0511115AL. The weight range 6 (0YF) "lowered ride height" rear springs are about 35% stiffer than your current 3Q0511115AL. You might find that weight range 5 and 6 springs are only comfortable if you are carrying five adults and all of their luggage. 30% to 35% stiffer springs is a ridiculous amount to increase the stiffness of the springs by. When working out the change in unladen ride height, you need to factor in that stiffer springs don't compress as much under the same load. So a stiff spring that looks like it will lower the car by 40mm might only lower the car by 30mm. Notice that the Eibach ERL (Eibach Replacement Line) springs that I've linked to at the bottom of this post, are sold to replace more than one OEM part number (except the weight range 6 spring), so might not be an exact match to the OEM part number that you want. However, I suspect for your needs they will be close enough to what they are sold to replace. When you purchase aftermarket springs online, check them carefully to make sure that they are what you ordered. With online sales, the seller gets a lot of returns and often the wrong springs will have been put back in the box. Weigh the spring, measure the wire diameter and the uncompressed length, and count the number of coil turns. If the springs don't seem right after fitting, you want to have those details so that you can investigate further and work out what the problem is. So often, people find that their new springs are either too high or too low, and don't know the specification of the springs that they have just fitted. Superb MK3 lowered ride height rear springs (you can tell that they are all "lowered ride height" springs because of the 1JC build code that they all have) 1 3Q0511115S Coil spring 2 PR-1JC+0YA 1 3Q0511115T Coil spring 2 PR-1JC+0YB 1 3Q0511115AA Coil spring 2 PR-1JC+0YC 1 3Q0511115AB Coil spring 2 PR-1JC+0YD 1 3Q0511115AC Coil spring 2 PR-1JC+0YE 1 3Q0511115AD Coil spring 2 PR-1JC+0YF 1 3Q0511115BH Coil spring 2 PR-1JC+0YG 1 3Q0511115AE Coil spring 2 PR-1JC+0YH 1 3Q0511115AF Coil spring 2 PR-1JC+0YJ 1 3Q0511115AG Coil spring 2 PR-1JC+0YK 1 3Q0511115BD Coil spring 2 PR-1JC+0YL 3Q0511115AA (+10% stiffness) https://www.autodoc.co.uk/eibach/18112509 3Q0511115AB (+20% stiffness) https://www.autodoc.co.uk/eibach/18112504 3Q0511115AC (+30% stiffness) https://www.autodoc.co.uk/eibach/16620565 3Q0511115AD (+35% stiffness) https://www.autodoc.co.uk/eibach/18112510

I prefer the industrial look.

I've seen the Cadiz alloy rims in both 7.5Jx18 ET49 and 8Jx19 ET50 specifications. 7.5Jx18 ET49 is almost the same specification as the standard Octavia MK4 7.5Jx18 ET48 specification. There's no need for 10mm spacers with that offset. Pushing the edge of the rims out by 10mm each side, just makes it easier to kerb the rims when going through 2 metre (6ft 6in) width restrictions. VW Golf MK7 "CADIZ" alloy rims 1 5G0601025AG Aluminium rim 'CADIZ' 7,5JX18H2 ET49 5/112 4 PR-C2K 5G0601025AGFZZ Aluminium gloss/black 1 5G0601025DQ Aluminium rim 'CADIZ' 7,5JX18H2 ET49 5/112 4 PR-C2K 1 5G0601025AH Aluminium rim 'CADIZ' 8 JX19H2 ET50 5/112 4 PR-C2T 5G0601025AHFZZ Aluminium gloss/black

With 225/40R18 tyres on the Octavia Mk4, the speedo might show 70mph when the actual speed is only about 65mph, ie. the speedo will over-read by a lot. You can check using the GPS speedo readout that google maps now includes in the app. As you are considering using 15mm front and 20mm rear spacers, that puts you in the serious modification category. So extreme is relative, and 225/40R18 tyres instead of the correct 225/45R18 tyre size isn't really any more extreme than 15mm and 20mm spacers. One advantage of 225/40R18 tyres over 225/45R18 is that they are a cheaper size. Another option, is fitting slightly oversize 235/45R18 to those 7.5Jx18 ET51 Octavia MK3 rims. The 235/45R18 tyre size is one of the standard tyre sizes on the Superb MK3. 235/45R18 aren't thin rubber bands, but they should give the rims good protection from pothole damage and give a good ride on those 7.5J rims.

The 18" rims on the Octavia MK4 have a 7.5Jx18 ET48 specification. If you use 18" rims from the Octavia MK3, the centre of the tyre will be moved 3mm into the wheelarch. Compared to 10mm wheel spacers, which would move the centre of the tyre 10mm further out of the wheelarch, 3mm is quite a small difference. Are you thinking of using 225/45R18 tyres from the Octavia MK4, or 225/40R18 tyres from the Octavia MK3? 3mm difference in offset is ok and perfectly usable, but not keeping to the standard offset which might be slightly better. It's possible that you wouldn't notice any difference when driving the car. 225/40R18 instead of the correct 225/45R18 is not ok, because the outside diameter of the tyre is about 3.4% too small. Octavia MK3 Gemini 7.5x18 ET51 5/112 57.1 alloy rims https://eshop.skoda-auto.cz/cs_CZ/hlinikove-disky/c/alloyWheels?q=%3ApriceAsc%3AcarType%3AOctavia%2BIII%2B%282012-2017%29%3AcarType%3AOctavia%2BIII%2B%282017%2B%29&page=2 If you're going to use 225/45R18 tyres, maybe look at the 7Jx18 ET45 alloy rims from the Karoq or 7Jx18 ET43 alloy rims from the Kodiaq. ET45 will move the centre of the tyre 3mm further out in the wheelarch compared to ET48. ET43 will move the centre of the tyre 5mm further out in the wheel arch compared to ET48. 225/45R18 tyres only need 7J rims, so using 7J instead of 7.5J will give extra protection from kerbing damage and give a slightly more comfortable ride. You can see lots of Karoq and Kodiaq alloy rims on "skoda eshop cz" https://eshop.skoda-auto.cz/

The fact that both front springs broke at the same time after 70,000 miles and 14 years shows that they have a consistent quality. Kilen springs are available on ebay for about £14 each, so it's the labour that's the expensive part. 6Q0411105AF might be suitable, but check your build codes or the coloured dots on each spring that can be used to identify them. As you can see in the chart below, if each spring is marked with 4 red dots and 1 blue dot, they will have OEM part number 6Q0411105AF. A selection of some of the front springs used on the Fabia MK2 1 6Q0411105AD Coil spring 3 paint marks 1 paint mark red blue 2 PR-L02 1 6Q0411105AE Coil spring 3 paint marks 2 paint marks red blue 2 PR-L03 1 6Q0411105AF Coil spring 4 colour strokes 1 paint mark red blue 2 PR-L04 1 6Q0411105AG Coil spring 1 paint mark 1 paint mark red yellow 2 PR-L05 1 6Q0411105AH Coil spring 1 paint mark 2 paint marks red yellow 2 PR-L06 Kilen 25045 front springs for Fabia MK2 1.4 petrol 86HP 6Q0411105AF https://www.ebay.co.uk/itm/354419416569

The Dacia Duster has tyre sizes 215/65R16 and 215/60R17 depending on specification. There's none of this nonsense with 18" and 19" rims. The Karoq is an SUV, not a VRS. Dacia Duster with sensible tyre and rim sizes https://en.wikipedia.org/wiki/Dacia_Duster#/media/File:2018_Dacia_Duster.jpg

The Sagittarius alloy rims have the usual Karoq 8Jx19 ET45 specification. I suggest you sell them before they get damaged on the kerb. You should get a good price on ebay if they are not damaged. They are very prone to kerbing damage because the 8J rims are quite wide for the 225/40R19 tyres, so that the sidewalls don't bulge out much. 19" alloy rims are very heavy. As you can see below, they generally weigh over 13kg. Here are the weights of some Kodiaq 7Jx19 ET43 rims as given by "skoda eshop cz" ARONIA 13kg CRATER 13.5kg TRIGLAV 14.3kg Here are the weights of some Karoq 8Jx19 ET45 rims as given by "skoda eshop cz" CETUS 13.1kg CRATER 13.9kg VEGA 13.7kg Here are the weights of some Karoq 7Jx17 ET45 rims as given by "skoda eshop cz", so maybe around 3kg lighter than the 19" rims. KUMA 11.1kg RATIKON 10.1kg/10.9kg TRITON 10.5kg However, I've seen some lightweight 7Jx16 ET45 rims from some Audi A4/A6 cars around the years 1997/2003 that only weigh about 7.3kg each. So that would be a weight saving of about 6kg each rim compared to the heavy 19" alloy rims. Together with 225/60R16 tyres (from the Karoq 4WD), they could work quite well on the Karoq. Multiple the weight saving by four, and that's 24kg less unsprung weight or 30kg weight saving if you include the spare wheel. 7Jx16 ET45 5/112 57.1 alloy rims 8D0601025K (weigh only 7.3kg each) 9 8D0601025K Aluminium rim 7 JX16H2 ET45 5/112 4 PR-C8Y - 8D0601025K Z17 Avus silver Back to your original question. If you consider both 225/45R19 (from the Karoq 4WD) and 235/40R19 (from the Superb MK3), neither are particularly good options. Out of the two, I would probably go for 225/45R19 because at least it's a Karoq standard tyre size. Normally, I would say go for the 235/40R19 but although wider than the 225/45R19 it will still give little protection from kerbing damage. At least the 225/45R19 should roll a little better and give ever so slightly more mpg. If you like 19" rims, I would go for the much narrower 7Jx19 ET43 rims from the Kodiaq with 225/45R19. Because the rims are so much narrower than 8J, the tyre's sidewalls will bulge out considerably more and therefore should give the rims a modest amount of protection from kerbing damage. The Karoq is related size wise to the Octavia, and the Octavia up to MK3 used common and cheap tyre sizes. You can still get excellent 195/65R15 for little more than £50 each. Some of the 225/45R19 sizes are close to £200 each. Such is progress. Of course, the 195/65R15 is no use to Karoq owners, but slightly oversize 215/65R16 rather than the standard Karoq 2WD 215/60R16 would fit. Vredestein Quatrac 6 195/65R15 91H https://www.camskill.co.uk/m138b0s7994p202140/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac_6_-_195_65_R15_91H_TL_Fuel_Eff_%3A_C_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_70dB Vredestein Quatrac 6 215/65R16 98H https://www.blackcircles.com/catalogue/vredestein/quatrac/215/65/R16/H/98/m?tyre=41007498 Vredestein Quatrac 6 225/60R16 102H XL (standard Karoq 4WD tyre size) https://www.camskill.co.uk/m139b0s8011p202131/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac_6_-_225_60_R16_102H_XL_TL_Fuel_Eff_%3A_B_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_71dB I am using the Vredesteins as examples of good all-season tyres which I've often used myself, but there's many other premium brands of all-season tyres such as Bridgestone, Continental, Goodyear, Hankook, Michelin, etc. that have often done well in tyre reviews. Outside diameter of tyres 215/65R16 685.9mm (+2.0% compared to 215/50R18) 225/60R16 676.4mm (+0.6% compared to 215/50R18) 215/50R18 672.2mm 225/40R19 662.6mm 225/45R19 685.1mm (+1.9% compared to 215/50R18) 235/40R19 670.9mm

Online sellers get a lot of returns. It's very common for a part to be in the wrong box.

Stabilus 016721 is shown as correct for the Fabia MK1 hatchback on both autodoc and the Stabilus website. Do you have a hatchback/estate or the saloon which uses much shorter struts? What length and stroke does your Stabilus 016721 have? Is it 440mm and 170mm? Maybe someone has put the wrong struts in the box? Or maybe your current struts are incorrect? Specification of Stabilus 016721 Eject force 600N Length 440mm Stroke 170mm

As you can see in the ETRTO chart below, the 225/40R19 can be fitted to a narrower 7.5J rim, but Karoq chose the 8J rim width. The Karoq 4WD uses a higher profile 225/45R19 for its 19" tyre size, that could be fitted to an even narrower 7J rim width. Skoda did fit a 225/45 (225/45R17) to a 7J rim on their Octavia MK3, as well as a 7.5J rim...so Skoda has done this before. The Audi Q2 uses similar sized tyres to the Karoq. However, with its 19" tyre size the Audi Q2 uses slightly wider 235/40R19 instead of the Karoq's 2WD 225/40R19 tyre size. If Skoda had chosen to fit a 235/40R19 to the Karoq (just like the Superb MK3 uses) then of course a minimum rim width of 8J would have been needed, as shown in the ETRTO chart below. However, anyone remotely interested in ride comfort would do well to avoid these 40 aspect ratio tyres. The 225/45R19 on the Karoq 4WD would probably ride reasonably well if it was fitted to the narrowest allowable rim width, ie. 7J, but even then still wouldn't be as good as a 225/50R17 fitted to a 7J rim. The 225/50R17 is also a much cheaper tyre size than 225/45R19. As far as the performance of these tyres goes, 225/50R17 is plenty low enough profile for spirited driving on a fast, twisty A road. ETRTO approved rim widths 225/45R19 7.0-7.5-8.5 225/40R19 7.5-8.0-9.0 235/40R19 8.0-8.5-9.5

You may be on standard ride height springs. Skoda list increased ride height springs, also known as rough road springs or heavy duty springs.. Have you considered these? They are stiffer, maybe 15% to 20% stiffer...which is a lot. This would mean that when you carried 5 passengers the springs would compress a lot less. In combination with increased outside diameter tyres, such as 185/70R14...this could really improve the car's off-road ability...particularly the big dip in the road/dirt track shown on your video...in last year's "lift kit" thread. You can see in the chart below, the four heavy duty rear springs that Skoda list for the Fabia MK1. The four rear springs are labelled 0YA, 0YB, 0YC, and 0YD. This is a hierarchy of stiffness, so 0YA is the softest spring and 0YD is the stiffest spring. On the aftermarket, the 0YD rear spring doesn't appear to be available. No Part code Title Note QNT Model suspension Shock absorbers for models with heavy duty suspension rear PR-1JB - 1 6Q0511115AH Coil spring for models with heavy duty suspension 1 paint mark 3 paint marks 1 paint mark orange blue yellow 2 PR-1JB/0YA 1 6Q0511115AC Coil spring for models with heavy duty suspension 1 paint mark 2 paint marks 1 paint mark orange blue yellow 2 PR-1JB/0YB 1 6Q0511115AD Coil spring for models with heavy duty suspension 1 paint mark 2 paint marks 2 paint marks orange blue yellow 2 PR-1JB/0YC 1 6Q0511115AE Coil spring for models with heavy duty suspension 1 paint mark 2 paint marks 1 paint mark orange blue green 2 PR-1JB/0YD Kilen 65082 and Lesjofors 4295095 match OEM part number 6Q0511115AC https://www.autodoc.co.uk/car-parts/oem/6q0511115ac?search=OEN 6Q0511115AC&supplier[0]=246&supplier[1]=253 Kilen 65083 and Lesjofors 4295096 match OEM part number 6Q0511115AD https://www.autodoc.co.uk/car-parts/oem/6q0511115ad?search=OEN 6Q0511115AD&supplier[0]=246&supplier[1]=253 These springs are available on ebay in the UK for about £71 for the two rear springs, ie. £35.50 each spring. If you can safely use axle stands and a trolley jack, then swapping over the rear springs can be done in a few hours by a reasonably competent home mechanic. Then if your were happy with the result, you could look at the matching front heavy-duty springs that Skoda list. The front springs take a bit longer to change than the rear springs, but a reasonable competent home mechanic shouldn't have too much difficulty swapping them over.

As you can see in the chart below, a 6J rim would be too wide for a 165/70R14 ETRTO approved rim widths 165/70 4.0-5.0-5.5 The Subaru might have a 56.1mm centre bore, in which case 1mm smaller than the 57.1mm Fabia MK1 rims.

Those alloys are one of my favourite Fabia rims. They look very strong. What rims do you have your 165/70R14 tyres on? Are they steel? 5Jx14 ET35 5/100 57.1 steel rim normally fitted with 165/70R14 on the Fabia MK1. Notice the 7 square holes to locate the wheel trims.

Do you still have these rims? At 6J wide, they are wider than the 5Jx14 rims that the 165/70R14 normally use. On the 6J rims, maybe go for 185/65R14. Vredestein Quatrac 5 185/65R14 86T https://www.camskill.co.uk/m137b0s7980p144832/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac5_Vredestein_Quatrac_5_-_185_65_R14_86T_TL_Fuel_Eff_%3A_D_Wet_Grip%3A_C_NoiseClass%3A_B_Noise%3A_69dB Be careful about going too low tyre pressure in case you damage the tyre and/or rims, but the low speed won't overheat the tyres. If you use 185/65R14 with a full load, maybe drop the pressures by 0.4Bar (6psi) to 1.8Bar (26psi) front and 2.0Bar (29psi) rear. With five people on board and luggage, going much lower than 26psi front and 29psi rear tyre pressures could damage the tyres and/or rims. With just two front passengers and no weight in the back, going 23psi front and 20psi should be ok while driving at 40km/h (24mph) off-road. 6Jx14 ET43 5/100 57.1 alloy rims 6Y0601025 Serious off-roaders use a lot of sidewall https://en.wikipedia.org/wiki/Suzuki_Jimny#/media/File:2019_Suzuki_Jimny_SZ5_4X4_Automatic_1.5.jpg