Carlston

Notice in the chart below, that there are both 5Jx14 ET35 and 6Jx14 ET43 steel rims for the Fabia MK1. 165/70R14 was fitted to the 5Jx14 ET35 rim. 185/60R14 was fitted to the 6Jx14 ET43 rim. As you have 185/60R14 tyres, you will have 6Jx14 ET43 rims and not 5Jx14 ET35 rims. Fabia MK1 steel rims 1 6Q0601027H Steel rim F >> 6Y-8B450 600 F >> 6Y-84024 468 5Jx14 ET35 6Q0601027H 03C rally black 1 6Q0601027R Steel rim F 6Y-8B450 601>> F 6Y-84024 469>> 5Jx14 ET35 6Q0601027R 03C rally black 1 6Q0601027P Steel rim 6Jx14 ET43 6Q0601027P 03C rally black

300HP sounds good until you look at the shape of the power curve. The power drops off so quickly at higher revs that for maximum acceleration it doesn't look like it would be worth revving past about 5,250rpm before changing up. However, it would help fuel economy and perhaps engine longevity by it not being beneficial to rev the engine out to the redline at 6,700rpm when accelerating. Maybe you could get a 5,250rpm rev limited added to the remap so that you don't have to worry about pointless over-revving past the worthwhile gear change points. I expect 272HP/280HP 4x4 engines hold onto their power higher up in the rev range than this remapped 220HP/300HP engine, due to their bigger turbos. To put the rapid drop off in power at higher revs into perspective, the power of a remapped turbo diesel engine might drop off rapidly after about 3,750rpm, so having a 5,250rpm usable redline is much better than that. Between about 5,600rpm and 5,800rpm it looks like the engine is only putting out about 220HP, which is a far cry from the 300HP peak power at about 4,500rpm. The engine has got a lot of torque, but below about 2,750rpm the torque drops off a cliff. At 2,000rpm the torque has dropped to just 275Nm. I don't know what the mph/1,000rpm is on the Superb MK3 with the 220HP engine, but if it's 32mph/1,000rpm the car would have to be driving at 88mph to be at that 2,750rpm point where there's a massive amount of torque available. In the old days, this was called coming on cam, ie. 2,750rpm is where the start of the power band is. 0rpm to 2,750rpm = slow 2,750rpm to 5,250rpm = fast

The Sachs rear shock absorbers make no mention of the VW Passat B8 Alltrack, so are unlikely to be a good match. KYB do list the VW Passat B8 Alltrack, but I suspect Sachs are simply being more honest than KYB. I think you will have similar problems with most of the other aftermarket rear shock absorbers, ie. not a close match. What about new Skoda rear shock absorbers? The Bilstein B6 are expensive, so maybe there won't be much difference in price. If you did go for OEM Skoda rear shock absorbers, you wouldn't have to do the front as it will already match the Skoda rear shock absorbers. If cost is important then maybe try the KYB, but you may find that the damping is a little on the weak side for the heavy and powerful Scout springs especially now that you are going for increased stiffness rear springs.

The KYB won't be a good match for the Scout springs. It will be better to keep your current rear shock absorbers, which if still in good condition should work a lot better than the KYB. In the chart below, you can see the huge number of OEM part numbers that the KYB 3448024 rear shock absorbers are sold to replace. Most of these OEM part numbers are not for increased ride height springs. What is happening, is that KYB don't have a good match for the Scout rear shock absorbers, so they are selling standard ride height rear shock absorbers instead. KYB 3448024 rear shock absorbers sold to replace the following OEM part numbers OE 5Q0513029DQ — VW / SEAT OE 5Q0513029DP — VW / SEAT OE 5Q0513029GL — VW / SEAT OE 5Q0513029EQ — VW / SEAT OE 5Q0513029EN — VW / SEAT OE 5Q0513029EM — VW / SEAT OE 5Q0513029EP — VW / SEAT OE 5Q0513029FE — VW / SEAT OE 5QN513049AT — VW / SEAT OE 5QN513049BA — VW / SEAT OE 5QN513049BH — VW / SEAT OE 3Q0513049GF — VW OE 3Q0513049GE — VW OE 3Q0513049GG — VW OE 5Q0513029EH — VW OE 5Q0513029BQ — VW OE 3Q0513049FA — VW OE 5Q0513029LL — VW OE 5Q0513029EG — VW OE 3Q0513049ER — VW OE 5Q0513029LM — VW OE 5QA513029AH — VW OE 3Q0513049GL — VW OE 5Q0513029FM — VW OE 5Q0513029FT — VW OE 5Q0513029DB — VW OE 5Q0513029JK — VW OE 3Q0513049EQ — VW OE 5Q0513029DA — VW OE 5Q0513029HC — VW OE 5Q0513029LK — VW OE 5QN513049AN — VW OE 5Q0513029HB — VW OE 5Q0513029FS — VW OE 5Q0513029JR — VW OE 3Q0513049FB — VW OE 3Q0513049GR — VW OE 5Q0513029NH — VW OE 3Q0513049FG — VW OE 5Q0513029AR — VW OE 5Q0513029JJ — VW OE 5QN513049AM — VW OE 3Q0513049FC — VW OE 3Q0513049GK — VW OE 5Q0513029AP — VW OE 5Q0513029HA — VW OE 5Q0513029JP — VW OE 5QF513049AP — VW OE 5QF513049T — VW OE 3Q0513049HB — VW OE 5QF513049BN — VW OE 5Q0513029JH — VW OE 3Q0513049GQ — VW OE 5Q0513029HJ — VW OE 5QF513049BP — VW OE 3Q0513049ES — VW OE 3Q0513049HE — VW OE 3Q0513049JL — VW OE 5Q0513029GP — VW OE 5Q0513029NG — VW OE 5QA513029AG — VW OE 5Q0513029HP — VW OE 5QF513049AL — VW OE 3Q0513049EC — VW OE 3Q0513049ED — VW OE 3Q0513049EE — VW OE 3Q0513049EF — VW OE 3Q0513049EG — VW OE 3Q0513049EH — VW OE 3Q0513049EJ — VW OE 3Q0513049EK — VW OE 3Q0513049ET — VW OE 3Q0513049FD — VW OE 3Q0513049FE — VW OE 3Q0513049FF — VW OE 3Q0513049FH — VW OE 3Q0513049FJ — VW OE 3Q0513049FK — VW OE 3Q0513049FL — VW OE 3Q0513049FM — VW OE 3Q0513049GH — VW OE 3Q0513049GJ — VW OE 3Q0513049GS — VW OE 3Q0513049GT — VW OE 3Q0513049HA — VW OE 3Q0513049HC — VW OE 3Q0513049HD — VW OE 3Q0513049HP — VW OE 3Q0513049HQ — VW OE 3Q0513049HR — VW OE 3Q0513049JC — VW OE 3Q0513049JK — VW OE 5Q0513029AQ — VW OE 5Q0513029DG — VW OE 5Q0513029DH — VW OE 5Q0513029DR — VW OE 5Q0513029DS — VW OE 5Q0513029GA — VW OE 5Q0513029GB — VW OE 5Q0513029GG — VW OE 5Q0513029GH — VW OE 5Q0513029GJ — VW OE 5Q0513029GK — VW OE 5Q0513029GS — VW OE 5Q0513029GT — VW OE 5Q0513029HD — VW OE 5Q0513029HF — VW OE 5Q0513029HG — VW OE 5Q0513029HK — VW OE 5Q0513029HL — VW OE 5Q0513029HM — VW OE 5Q0513029HN — VW OE 5Q0513029LN — VW OE 5Q0513029LP — VW OE 5QA413031AC — VW OE 5QA513029AJ — VW OE 5QA513029AK — VW OE 5QA513029AL — VW OE 5QA513029AS — VW OE 5QA513029AT — VW OE 5QA513029BA — VW OE 5QF513049AA — VW OE 5QF513049AB — VW OE 5QF513049AK — VW OE 5QF513049AM — VW OE 5QF513049AN — VW OE 5QF513049AQ — VW OE 5QF513049BR — VW OE 5QF513049BS — VW OE 5QF513049Q — VW OE 5QF513049R — VW OE 5QF513049S — VW OE 5QN513049AP — VW OE 5WA513029BC — VW OE 5WA513029S — VW OE 5WA513029T — VW OE 5Q0513029EC — AUDI OE 5Q0513029EB — AUDI OE 5Q0513029GM — AUDI OE 5Q0513029AS — AUDI OE 5Q0513029EL — AUDI OE 8S0513029 — AUDI OE 5Q0513029BK — AUDI OE 5Q0513029EK — AUDI OE 5Q0513029JE — AUDI OE 5Q0513029CJ — AUDI OE 5Q0513029CK — AUDI OE 5Q0513029ET — AUDI OE 8S0513029A — AUDI OE 5Q0513029GN — AUDI OE 8S0513029D — AUDI OE 8S0513029B — AUDI OE 5Q0513029CM — AUDI OE 5Q0513029BM — AUDI OE 5Q0513029ER — AUDI OE 8S7513029D — AUDI OE 8S7513029G — AUDI OE 5Q0513029HQ — AUDI OE 8S7513029F — AUDI OE 5Q0513029HH — AUDI OE 5Q0513029JF — AUDI OE 5QF513049BL — AUDI OE 5Q0513029EA — AUDI OE 5Q0513029ES — AUDI OE 5Q0513029FA — AUDI OE 5Q0513029HR — AUDI OE 5Q0513029NQ — AUDI OE 5QF513049BM — AUDI OE 5QF513049CD — AUDI OE 5QF513049CE — AUDI OE 5QF513049CM — AUDI OE 83A513049B — AUDI OE 8S7513029E — AUDI OE 3Q0513049FN — SKODA OE 5Q0513029GC — SKODA OE 5Q0513029FL — SKODA OE 5Q0513029EF — SKODA OE 3Q0513049FR — SKODA OE 5Q0513029FN — SKODA OE 5Q0513029KF — SKODA OE 5Q0513029FK — SKODA OE 5Q0513029FB — SKODA OE 3Q0513049FT — SKODA OE 5QF513049AS — SKODA OE 5Q0513029DF — SKODA OE 5Q0513029KB — SKODA OE 3Q0513049FQ — SKODA OE 5Q0513029FQ — SKODA OE 5Q0513029ED — SKODA OE 5Q0513029FD — SKODA OE 5Q0513029GD — SKODA OE 5Q0513029EE — SKODA OE 5Q0513029FC — SKODA OE 5QF513049AT — SKODA OE 3Q0513049GA — SKODA OE 5Q0513029KC — SKODA OE 5Q0513029KK — SKODA OE 3Q0513049FP — SKODA OE 3Q0513049FS — SKODA OE 3Q0513049GB — SKODA OE 5Q0513029DD — SKODA OE 5Q0513029DE — SKODA OE 5Q0513029DL — SKODA OE 5Q0513029DN — SKODA OE 5Q0513029DT — SKODA OE 5Q0513029FP — SKODA OE 5Q0513029JM — SKODA OE 5Q0513029JN — SKODA OE 5Q0513029JT — SKODA OE 5Q0513029KA — SKODA OE 5Q0513029KD — SKODA OE 5Q0513029KE — SKODA OE 5Q0513029KH — SKODA OE 5Q0513029KL — SKODA OE 5Q0513029KT — SKODA OE 5Q0513029MH — SKODA OE 5Q0513029MJ — SKODA OE 5Q0513029MK — SKODA OE 5Q0513029MM — SKODA OE 5Q0513029MN — SKODA OE 5QF513049AH — SKODA OE 5QF513049AJ — SKODA OE 5QF513049BG — SKODA OE 5QF513049BH — SKODA OE 5WA513029AR — SKODA OE 5WA513029AS — SKODA OE 5WA513029AT — SKODA OE 5WA513029BA — SKODA OE 5WA513029BF — SKODA OE 5WA513029BG — SKODA OE 5WA513029BH — SKODA OE 5WA513029BJ — SKODA OE 5WA513029BK — SKODA OE 5WA513029BL — SKODA OE 5WA513029BM — SKODA OE 5WA513029BN — SKODA OE 5WA513029BP — SKODA OE 5WA513029BQ — SKODA OE 5Q0513029FF — SEAT OE 5Q0513029FG — SEAT OE 5Q0513029CT — SEAT OE 5Q0513029HT — SKODA / SEAT OE 5WA513029AD — SEAT / CUPRA OE 5WA513029AE — SEAT / CUPRA OE L5QD513029G — VW (FAW)

Just so you know, Kilen 4295131 and Lesjofors 4295131 are the same springs, just marketed under different brand names. They are both made in the same factory in Sweden. In the UK, Kilen is sold more widely than Lesjofors. However, in some European countries Lesjofors is sold more widely than Kilen. So just purchase whatever is cheaper.

To begin with, I would just change the rear springs and shock absorbers. If you decided to go for the 3Q0511115BB rear springs, as well as the Kilen/Lesjofors option you also have the option to purchase OEM Skoda springs. However, the Skoda springs will be about twice the price of the Kilen/Lesjofors springs and aren't any better. The only realistic alternative to the Bilstein B6 24-267137 increased ride height rear shock absorbers is probably OEM Skoda increased ride height rear shock absorbers matching 3Q0513049GA or 3Q0513049GB. Most aftermarket shock absorbers are aimed at standard ride height cars and in some cases lowered ride height cars, so you don't have much choice. Many aftermarket shock absorbers will claim that they can replace the 3Q0513049GA or 3Q0513049GB increased ride height rear shock absorbers but as these same shock absorbers are also being sold to replace standard ride height shock absorbers and in some cases lowered ride height shock absorbers, ie. a one size fits all approach. If you use these "one size fits all" aftermarket shock absorbers you are likely to be disappointed with them, as they are unlikely to have a great enough damping effect. This is because the increased ride height cars use stiffer and heavier duty springs, so need shock absorbers that are up to the job. Changing rear springs and rear shock absorbers is a much easier job than changing the front. Perhaps half the amount of time. Hence one reason why I suggest you sort out the rear first. And you may find that the car drives fine without even doing the front. After a few weeks of testing, only then would I consider the front. If the car drives fine, you could even wait until the front shock absorbers start leaking or otherwise need replacing before fitting matching Bilstein B6 front shock absorbers.

Bilstein B4 19-262727 is sold to replace the following OEM part numbers. However, although 3Q0513049HC is an increased ride height rear shock absorber, most of the others appear to be lowered ride height rear shock absorbers. For this reason, the Bilstein B6 24-267137 is looking like a better match for the 3Q0513049HC increased ride height rear shock absorber. Bilstein B4 19-262727 sold to replace the following OEM part numbers 3Q0513049EQ 3Q0513049FA 3Q0513049FB 3Q0513049FC 3Q0513049FD 3Q0513049FE 3Q0513049FG 3Q0513049FH 3Q0513049HC

Bilstein B4 19-262727 can replace 3Q0513049HC which is the rear shock absorber for the Passat B8 Alltrack 4x4 with increased ride height, so should work well on the Superb MK3 4x4 with increased ride height. Both the Superb MK3 4x4 with increased ride height and the Passat B8 Alltrack 4x4 with increased ride height have the same or almost the same rear springs, so sharing the same rear shock absorbers would make sense.

The Rapid uses the same 7Jx17 ET46 5/100 57.1 specification rim as the Fabia MK3, with both using 215/40R17 tyres. Take a look on "skoda eshop cz" and see if you can see your rim. https://eshop.skoda-auto.cz/cs_CZ/hlinikove-disky/c/alloyWheels?q=%3ApriceAsc%3AcarType%3ARapid%2B%282012-2020%29&page=2

3Q0513049FT is the rear shock absorber for the Superb MK3 front wheel drive with increased ride height. 3Q0513049GA and 3Q0513049GB are the rear shock absorbers for the Superb MK3 4x4 with increased ride height. For firmer rear springs I would go for 3Q0511115BB, which are two up in the hierarchy compared to the standard 3Q0511115AT. Kilen 4295131 and Lesjofors 4295131 are sold to replace 3C0511115BR, 3Q0511115BA, and 3Q0511115BB and should be the same or close to 3Q0511115BB. Most of the aftermarket rear shock absorbers for the Superb MK3 tend to be the same for both increased ride height and standard ride height, ie. a one size fits all approach. This isn't necessarily a good thing, because they won't necessarily be optimised for increased ride height. However, I suspect Bilstein B6 24-267137 rear shock absorbers would work well on the Superb MK3 4x4 with increased ride height such as the Scout, as it's listed for the VW Passat B8 Alltrack.

The build codes aren't in the car. They are on the VW database. Every car that leaves the factory will have all of their build codes on the VW database. There are at least two ways to get hold of the build codes. For about 3 Euros, there's an ebay seller that can supply your build codes. Search "skoda vin decoder" on ebay to find the listing. https://www.ebay.co.uk/itm/224631127243 For about 7 Euros, you can obtain your build codes from "skoda erwin". This gives you 1 hour's access, which should be enough time to download the build codes, and you can also download manuals as well. Once you have your build codes (there might be around 180 build codes) you can decode them on "vw codes decoder". You can also use an official Skoda parts catalogue to find parts by reference to the build codes. VW codes decoder http://igorweb.org/equidec.aspx Skoda parts catalogue (this is not a recommendation for lllparts, it's just to find OEM part numbers) https://www.lllparts.co.uk/catalogs/skoda

What OEM part number are your rear springs? One Superb MK3 estate owner who had a soft rear end simply fitted new standard rear springs and found that their rear end was much improved. So maybe Skoda have been fitting poor quality rear springs that sag over a short space of time. Having build code UC7 would mean that you have increased ride height rear springs which should be in the list below. If you also have build code 0YF, that would mean that you had rear springs with OEM part number 3Q0511115AS. Skoda Superb MK3 4x4 increased ride height rear springs UC7 1 3Q0511115BG Coil spring 2 PR-UC7+0YA 1 3Q0511115AN Coil spring 2 PR-UC7+0YB 1 3Q0511115AP Coil spring 2 PR-UC7+0YC 1 3Q0511115AQ Coil spring 2 PR-UC7+0YD 1 3Q0511115AR Coil spring 2 PR-UC7+0YE 1 3Q0511115AS Coil spring 2 PR-UC7+0YF 1 3Q0511115AT Coil spring 2 PR-UC7+0YG 1 3Q0511115BA Coil spring 2 PR-UC7+0YH 1 3Q0511115BB Coil spring 2 PR-UC7+0YJ 1 3Q0511115BE Coil spring 2 PR-UC7+0YK

ATE 334x32mm front brakes instead?

Octavia MK2 VRS Front brakes ATE 312x25mm https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/663/6/615/615030 Rear brakes TRW 282x12mm https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/663/6/615/615062

The Octavia MK2 fits its 205/55R16 tyre size to a 6.5Jx16 ET50 5/112 57.1 rim.

Seat Leon Cupra R Brembo 323x28mm 5/100 front brakes (18" minimum rim diameter) No Part code Title Note Quantity Floating caliper brake Brake caliper housing Brake disc (vented) Brake hose front Brembo 323X28 5/100 1 1ML615105 brake caliper housing with pads brake pad wear display left 1 1 1ML615106 brake caliper housing with pads right 1 2 1ML615421 Securing bracket for floating caliper brake 2 3 6KL615141 Socket head bolt with hexagon socket head M12X1,5X67 4 4 1ML611735 brake pipe from brake hose to piston housing left 1 4 1ML611736 brake pipe from brake hose to piston housing right 1 5 1ML611799 Retainer for brake hose left 1 5 1ML611800 Retainer for brake hose right 1 6 1ML615293 Hexagon bolt M6X12 2 7 1ML611701A Brake hose 514MM 2 8 4D0611715B retaining spring 2 9 1ML615301 Brake disc (vented) 323X28 5/100 2 10 8N0615311C Cover plate for brake disc left 1 10 8N0615312C Cover plate for brake disc right 1 11 N 10648301 Hex socket countersunk bolt M6X16 2 12 N 90305302 Hex collared bolt M6X10 6 13 N 90708504 Hex collared bolt M12X1,5X35 4 14 1ML698151 1 set: brake pads with wear indicator for disc brake 1 15 6KL698273 repair set 4 16 1ML698295 1 set fixing parts for disc brake pads 2 17 1ML698471 Set of gaskets for brake caliper housing 2 18 G 000650 Solid lubricant paste 100G X 19 G 052150A2 Lithium lubricating grease 180G X

It's a fact. If you got stopped by VOSA (or whatever they are calling themselves nowadays) and they found that your tyres were underinflated you would be for the high jump Ken.

323x28mm, 334x32mm, and 312x25mm front brake discs were used in conjunction with 256x22mm ventilated rear brake discs. After the Octavia MK1 VRS, the Octavia VRS didn't get ventilated rear discs again until the Octavia MK3 VRS facelift. The Octavia MK2 VRS and the Octavia MK3 VRS pre-facelift only had solid rear brakes, not ventilated. 256x22mm ventilated rear discs 5/100 PCD

Brembo four piston calipers are used with the 323x28mm front brake discs (fitted to Seat Leon Cupra R) Seat Leon Cupra R parts catalogue https://www.lllparts.co.uk/catalogs/seat/E/LE/268/6/615/615036 ATE two piston calipers are used with the 334x32mm front brake discs (fitted to Golf MK4 and Audi TT) VW Golf MK4 parts catalogue https://www.lllparts.co.uk/catalogs/vw/RDW/GOLF/405/6/615/615045 Audi TT parts catalogue https://www.lllparts.co.uk/catalogs/audi/RDW/ATT/278/6/615/615045

Have you got a white tyre pressure label under the fuel filler flap? Example of white tyre pressure label under the fuel filler flap

VAG do a huge number of tyre pressure charts with a huge range of tyre pressures, often changing inexplicably from one version of a chart to the next updated version of the chart. It probably depends which young apprentice they've given the job to, as to what tyre pressures make it onto the white label that they stick under the fuel filler flap. None of the recommended tyre pressures that VAG give on their white labels are likely to be underinflated, but many will be overinflated...especially when they group tyres with different load indexes together such as 225/35R19 and 225/40R18 which are four different load indexes apart, ie. 88SL/92XL versus 84SL/88XL. Notice in the VW Golf tyre pressure chart above, that 225/40R18 is incorrectly shown as having a load index of 82. It's either 88 for the standard load index or 92 for the extra load index, with the 225/40R18 tyre size. 225/40R18 can support a 12% heavier load than 225/35R19 when inflated to the same tyre pressure, yet in the chart above they've inexplicably grouped them together. However, VAG won't always be recommending tyre pressures just on load carrying capacity but on handling characteristics. For example, many drivers will have added 3psi to their front tyre pressures at some point from what the manufacturer recommends simply to sharpen up the front steering/handling. Load indexes 84 (500kg) 88 (560kg) 92 (630kg) By giving a range of tyre pressures according to load, it leaves it up to the driver to decide what they want to go with that day. It's always best to overinflate rather than underinflate. So if you had a multidrop delivery job and loaded the car up fully at the start of the day and emptied it completely by the end of the day, you would probably want to go with the tyre pressures recommended by the manufacturer for a fully loaded car. Many firms that use lots of vans such as Royal Mail will inflate for the maximum gross weight of the vehicle, even though most of the time they will be lightly loaded. This doesn't help driver comfort, who most of the time will be driving around with tyres that are pumped up far too hard for the load. The same applies to buses. If the bus is half empty, the bus' tyres will be far too hard for the load resulting in a harder ride for the passengers.

235/35R19 are oversize tyres compared to the standard 225/35R19 tyre size. Therefore Skoda don't list tyre pressures for the 235/35R19 tyre size. However, comparing the load indexes of the standard tyre sizes with the load index of the oversize 235/35R19 tyre size you can estimate suitable tyre pressures. Out of the four 205/50R17, 225/45R17, 225/40R18, and 225/35R19 tyre sizes, 225/40R18 has the closest load index to the oversize 235/35R19. Estimated tyre pressures for the oversize 235/35R19 tyre size with the car half loaded 2.4Bar (35psi) front tyres 2.4Bar (35psi) rear tyres However, I would probably try somewhere between 2.4Bar (35psi) front and 2.2Bar (32psi) rear for a less than half loaded car with very little weight in the back and 2.6Bar (38psi) front and 2.8Bar (41psi) rear for a car loaded somewhere between half and full.

KYB RH3941 is sold to replace just 1K0411105DB and no other OEM part numbers, so should be an exact match. Kilen 23117 is sold to replace 1K0411105DB, 1K0411105EB, 1K0411105EC, and 1K0411105JB, so may not be an exact match to 1K0411105DB. KYB RH3941 is available on ebay from carpartsinmotion for £25.05 each https://www.ebay.co.uk/itm/234790785317 1K0411105DB https://www.autodoc.co.uk/spares-search?keyword=1K0411105DB&supplier[0]=246&supplier[1]=85

Seems a bit extreme. Compared to 7.5Jx19 ET48, the edge of each rim will be moved out by 0.5" (12.7mm) + 10mm = 22.7mm Moving each rim 22.7mm outwards, means the edges of the rims are spaced 45.4mm further apart which is almost 2". It might be easy to badly kerb the rims when going through 6ft 6in (2 metre) width restrictions. Fitting 225/35R20 to 8.5J rims stretches the sidewalls (see ETRTO chart below), making the ride harder and giving little to no protection to the rims from kerbing damage. 225/35R20 fitted to 8Jx20 ET41 rims from the Kodiaq would be less extreme. Fitting Skoda rims, means that should you damage one and need a replacement, finding a replacement should be a lot easier than trying to source a single replacement aftermarket rim. All Skoda rims have unique identifying numbers, ie. the OEM part number, making it easy to find a replacement should the need arise. With the 8Jx20 Kodiaq rim, you could also consider 235/35R20. However, when you're pushing the limits in clearance, it would be prudent to just purchase two tyres first. That way you could try them on the front of the car and then the back of the car. If rubbing occurred on the front, 235/35R20 could be used on the rear with the slightly narrower 225/35R20 used on the front. XTREME 8Jx20 ET41 5/112 57.1 alloy rim (from Kodiaq) https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-xtreme-20-pro-kodiaq/p/565071490E+QXJ ETRTO approved rim widths for passenger car tyres 225/35 7.5-8.0-9.0 235/35 8.0-8.5-9.5

On the Octavia MK3, the 205/50R17 tyre size is to allow for snow chains to be fitted on the front wheels as 225/45R17 doesn't provide enough clearance. Full information is shown in the owner's manual.