Carlston

225/40R19 is a hard riding tyre, especially when fitted to the Karoq's relatively wide 8J rims. You would easily notice the improved ride by changing from 225/40R19 fitted to 8J rims to 225/45R18 fitted to narrower 7.5J rims. Then you would easily notice the improved ride by changing from 225/45R18 fitted to 7.5 rims to 225/50R17 fitted to even narrower 7J rims. So you will be getting not one, but two easily noticeable improvements. In fact, I suspect most people would be happy with the ride on 225/50R17 fitted to 7J rims...unlike the really quite awful riding 225/40R19 on 8J rims. Avoid over-specifying the tyre, such as W and Y speed rated tyres, because the Karoq doesn't go over 150mph. If you only need V speed rated tyres (or H speed rated tyres) then choosing W or Y could make the sidewalls stiffer and therefore the ride unnecessarily harder. You may also want to specify SL Standard Load tyres, rather than XL eXtra Load tyres, but that may depend on what tyres are available. One of the tyre reviews commented that the Continental All-Season tyres have a good subjective feel...which is always a good thing. Continental All-Season 225/50R17 98V XL (Euro label B B 72dB) https://www.camskill.co.uk/m140b0s8019p152836/Continental_Tyres_All_Season_Car_Continental_ContiAllSeasonContact_Continental_Conti_All_Season_Contact_-_225_50_R17_98V_XL_FR_TL_Fuel_Eff_%3A_B_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_72dB

My view about significant modifications, is if the Skoda car left the factory with those modification, would the car be in a higher insurance group to what it is now. Things like more engine power, or a top of the range stereo are likely to increase the car's insurance group so are clearly a significant modification. A 2mm difference in offset, is not a significant modification. I don't think even the strictest insurance assessor could argue against that statement, unless he had a very long nose and was called Pinocchio. Compared to the standard Karoq 2WD 215/60R16, 215/55R17, 215/50R18, 225/40R19 tyre sizes, 225/50R17 is not significantly different. Performance wise, most people would probably agree that it has less performance than the very low profile 225/40R19. As you can see in the ETRTO chart below, 7J is a good rim width to use for a 225/50R17 tyre. ETRTO approved rim widths 225/50 6.0-7.0-8.0

From the photos, it looks like there's enough room to change the 125/70R18 space saver tyre to a 135/80R18 space saver tyre on the 3.5Jx18 ET25.5 5/112 57.1 steel space saver rim. This would bring the outside diameter of the space saver tyre to closely match the outside diameter of the standard Karoq 4WD tyres, such as 225/60R16, 225/55R17, 225/50R18, 225/45R19, etc. 135/80R18 space saver tyre https://www.camskill.co.uk/m129b0s7672p0/Temporary_Spare_Tyres_-_Space_Saver_Tyres_-_18_inch_R18_inch_-_135_80_18_135_80R18_R18_inch_-_135_18_135R18 As you can see in the ETRTO chart below, a 3.5J rim width is ideal for both the 125/70R18 and 135/80R18 space saver tyres. ETRTO approved rim widths 125/70 3.0-3.5-4.0 135/80 3.5-3.5-4.5 You might expect a 135/80R18 tyre to be 10mm wider than a 125/70R18, but when they are both fitted to a 3.5J rim, the 135/80R18 is only about 7mm wider than the 125/70R18.

The 26.05.2015 date relates to the date of production in the factory, not when the car was registered. Normally, you wouldn't use different calipers on the same axle, but the ATE and Mando do appear to have an identical specification and therefore performance. They even use the same brake pads and the same rebuild kits. However, it's best to do both sides on the same axle. I expect the change from ATE to Mando was simply an economy measure. I've had a look at prices on autodoc, and the ATE calipers appear to be considerably cheaper in general than Mando. So I would go with the ATE. The reason for this is that later parts start out as more expensive than earlier parts, but as the years roll by the prices drop. Here are the OEM part numbers for the ATE brake calipers for the 256mm front brake discs. Left ATE brake caliper for 256mm front brake discs 1ZG 1K0615123D Right ATE brake caliper for 256mm front brake discs 1ZG 1K0615124D Floating caliper brake Brake caliper housing Brake disc (vented) D >> - 26.05.2015 front FS III 256X22MM 14" PR-1ZG - 1 1K0615123D Brake caliper housing left 1 1 1K0615124D Brake caliper housing right 1

ATE is the same as Teves. However, if your Fabia's build date was 26.05.2015 or later you will have Mando front brake calipers. They use the same brake pads as the ATE brake calipers used before that date. Skoda parts catalogue https://www.lllparts.co.uk/catalogs/skoda/CZ/FAB/797/6

Good point about the electronic rear brakes. The old style cable operated rear brakes are so much better...at least for cleaning up the rear brake discs.

Wheel bearing with assembly parts 8V0598625 https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/753/5/505/505030 SKF VKBA 6556 Wheel Bearing Kit with integrated ABS sensor https://www.autodoc.co.uk/skf/1362995

The rear 300x12mm brake discs start at 12mm thick, and have a minimum thickness of 10mm. If the rear brake discs still have over 11mm of thickness I would just fit new rear brake pads as the discs themselves look quite smooth apart from some deep rust spots. Maybe clean them up first by using the handbrake little and often when going down hill. Don't get them red hot as there's no need for that, as little and often will get the surface polished up. Don't do spirited Italian style driving because that wastes fuel, and using the foot brake mainly wears the front brakes, not the rear brakes. It's the handbrake you want, and only downhill to save fuel.

New springs and shock absorbers will bring the ride height back to standard. Increased ride height springs will only increase the ride height by about 15mm. The problem with increased ride height springs and shock absorbers is the difficulty finding ones that are a good match to the original Skoda parts that the increased ride height cars use, as the aftermarket is generally aimed as standard ride height cars. Try the standard ride height with new springs and shock absorbers, and if you're still not happy with the ride height fit slightly oversize tyres with a slightly bigger outside diameter, but I doubt you would need to do that even for London roads. Most people who fit increased ride height springs and shock absorbers take their cars off-road such as down rutted dirt tracks...and that's where the Octavia Scout comes in, as that car uses both 15mm increased ride height springs and approximately 15mm increased ride height from the tyres...making a total increase in ride height of about 30mm. Front springs for Octavia MK3 1.4 petrol 150HP hatchback DSG standard ride height 5Q0411105GH Kilen 23129 https://www.ebay.co.uk/itm/354459092355? Rear springs for Octavia MK3 1.4 petrol 150HP hatchback DSG standard ride height without towbar 5Q0511121AE Kilen 63139 https://www.ebay.co.uk/itm/354459092356 Good matching aftermarket springs were easy to find. Not so easy, is finding good matching aftermarket shock absorbers...at least without the OEM part numbers for the original shock absorbers that the car left the factory with. So what are the OEM part numbers for your front and rear shock absorbers? You can find these out if you have all your car's build codes. There's an ebay seller who can supply your car's build codes for about 3 Euros. Search "skoda vin decoder" on ebay to find the listing https://www.ebay.co.uk/itm/224631127243 As you can see below, some of your car's build codes may include L03 1JA 0YE. If your car is still on the original front springs, they should be marked with coloured dots that are used to identify them. 1 Blue dot and 1 Violet dot means that the front springs have OEM part number 5Q0411105GH, as shown below. It looks like the rear springs aren't marked with coloured dots. Front coil spring 5Q0411105GH L03 1 Blue dot, 1 Violet dot Rear coil spring 15Q0511121AE 1JA+0YE

Octavia MK1 256x22mm front brake discs and 230x32mm rear drum brakes 60HP 1.4 petrol 68HP 1.9 diesel 75HP 1.4 petrol 75HP 1.6 petrol 101HP 1.6 petrol 102HP 1.6 petrol 280x22mm front brake discs and 232x9mm rear brake discs (4WD has 239x9mm rear disc brakes) 90HP 1.9 diesel 100HP 1.9 diesel 110HP 1.9 diesel 116HP 2.0 petrol 125HP 1.8 petrol 288x25mm front brake discs and 232x9mm rear brake discs (4WD has 239x9mm rear disc brakes) 130HP 1.9 diesel 150HP 1.8 petrol 312x25mm front brake discs and 256x22mm rear brake discs 180HP 1.8 petrol As you can see in the above chart, both 280x22mm front brake discs and 288x25mm front brake discs are matched to 232x9mm rear brake discs, except that the Octavia MK1 4WD cars always have the larger 239x9mm rear disc brakes. This makes sense, because the four wheel drive system increases the weight over the rear wheels. However, it always makes sense to check the car's build codes in case any particular car doesn't follow the above.

Octavia MK1 256x22mm front brake discs 60HP 1.4 petrol 68HP 1.9 diesel 75HP 1.4 petrol 75HP 1.6 petrol 101HP 1.6 petrol 102HP 1.6 petrol 280x22mm front brake discs 90HP 1.9 diesel 100HP 1.9 diesel 110HP 1.9 diesel 116HP 2.0 petrol 125HP 1.8 petrol 288x25mm front brake discs 130HP 1.9 diesel 150HP 1.8 petrol 312x25mm front brake discs 180HP 1.8 petrol 15" rims fit over 288mm front discs. Jurid on autodoc seems quite accurate for front brake disc size.

The Scout uses bigger outside diameter tyres, so things like speedo and gearing are likely to be different. Do you have an increased ride height Octavia MK2 4WD? Maybe put up a photo of the white build code label in the spare wheel well area under the carpet. As you can see below, build code 2UA means you have standard ride height, build code 2UB means you have increased ride height/rough-road design, and build code 2UC means you have sports/lowered suspension. VW Codes Decoder 2UA = Standard design 2UB = Rough-road design 2UC = Sports version http://igorweb.org/equidec.aspx

I recently saw a secondhand Octavia MK3 VRS for sale with 19" rims. The owner had changed from the standard 225/35R19 tyre size to massively over size 235/40R19 from the Superb MK3. No doubt, as a result of previous damage to the damage prone 225/35R19. He might not have realized that fitting 235/40 tyres to 7.5J rims is technically illegal as they officially need 8J rims, although the tyre fitter should have refused to fit them. ETRTO approved rim widths 225/35 7.5-8.0-9.0 235/40 8.0-8.5-9.5

When changing offsets either through different offset rims or using spacers, someone always jumps up and claims that your wheel bearings won't last. This has been going on for decades. However, I've checked the front wheel bearings on the Karoq 4WD and they are exactly the same as the later Audi Q3 front wheel bearings. Clearly, the Audi Q3 6.5Jx17 ET33 rims can also be used on the Karoq 4WD without damaging the wheel bearings. Audi Q3 and Karoq 4WD front wheel bearings are exactly the same as shown in the photo below https://www.autodoc.co.uk/car-parts/oem/8v0498625a?search=OEN 8V0498625A

Looks clear to me, but stick to psi if you find the decimal point confusing.

That would mean that nobody could use wheel spacers, even 10mm ones because that would change the offset by more than 4mm. wheel-size.com aren't experts on offsets, they just compile lists...often with many mistakes.

Better go to specsavers.

It's not 3 times over the max because the max isn't ET43. That's simply one of the standard offsets that the Karoq uses. As well as 215/60R17 fitted to 6.5Jx17 ET33 rims, you could also use 235/55R17 fitted to 7Jx17 ET43 from the Audi Q3 on the Karoq 4WD. wheel-size.com have only recently started saying offset range ET41-ET45 when referring to an ET43 offset. This just leads to confusion. They do this with every car not just Skodas. wheel-size.com are simply covering themselves, as some cars such as the Superb MK3 use more than one offset for the same diameter of rim such as 17". Two different 17" rims for the Superb MK3, ie. 6.5Jx17 ET41 and 7Jx17 ET40 https://eshop.skoda-auto.cz/cs_CZ/hlinikove-disky/c/alloyWheels?sort=priceAsc&q=%3AscoreDesc%3AcarType%3ASuperb%2BIII%2B%282015%2B%29%3ArimDiameter%3A17%22# wheel-size.com only list the 7Jx17 ET40 rim for the Superb MK3, and not the 6.5Jx17 ET41 rim. https://www.wheel-size.com/size/skoda/superb/2018/ So what wheel-size.com are saying when they give a +2mm or -2mm range of offsets, is that there may be more than one specification of rim for any one particular diameter of rim that the manufacturer offers. It has nothing to do with making a judgement on what alternative non-standard rim offsets are acceptable.

1 Bar = 14.5038 psi 2 Bar = 29.0075 psi 3 Bar = 43.5113 psi I've never heard of anyone confusing Bar with PSI as they are so different. If you accidentally inflated your tyres to 2.5 psi rather than 2.5 Bar, they would look almost flat.

8U0071497 is shown in the accessory catalogue for the Audi Q3 as shown below. These alloy rims are sold to be used with 215/60R17 winter tyres on the Audi Q3. 6.5Jx17 ET33 5/112 57.1 alloy rim 8U0071497 1 8U0071497 Aluminium rim 5 spokes 6.5Jx17 ET33 8U0071497 8Z8 Diamond silver

It's an ATE 310mm/312mm front brake system, ie. ATE front brake calipers and carriers. ATE have replaced the old 312mm front discs for new and improved 310mm front discs, and no longer sell the old 312mm discs. The old 312mm discs had a minimum wear thickness of 23mm, but the new 310mm have a new and improved wear thickness of 22mm, ie. the new ones will last 50% longer. As you can see below, there are at least two different designs of ATE front brake calipers for the 288mm and 310mm/312mm front brake discs. ATE brake calipers https://www.autodoc.co.uk/ate/955174 ATE brake calipers https://www.autodoc.co.uk/ate/955170 ATE 310mm front discs 5/100 https://www.autodoc.co.uk/ate/957594

Have you got a photo of your build code label in the spare wheel well area under the carpet? It looks like you have 312mm front discs, and Jurid, Ferodo, and Valeo on autodoc all think your car came with 288mm front discs. Maybe someone has upgraded them from 288mm to 312mm? Build code 1ZE means that the car left the factory with 288mm front discs. Build code 1LP or 1LL means that the car left the factory with 312mm front discs. Here's what a build code label looks like. Notice that this VW Bora TDI 110kW (150HP) has build code 1ZE, so has 288mm front discs. Changing from 288mm to 312mm front brake discs is an easy job on the Octavia MK2, as the calipers are the same. So just a change of carrier and brake discs is all that's required for the upgrade. ATE 312mm brake caliper carrier https://www.autodoc.co.uk/ate/13765568

If you're running 205/55R16, it might be worth changing to 195/65R15 for a bit more sidewall and therefore resistance to pothole damage. Jurid on autodoc thinks that the Octavia MK2 2.0TSI 150HP has 288mm front discs. If so, 15" rims will clear the front brake calipers.

Your Skoda might have around 180 build codes. A build code is a 3 digit code made up of numbers and letters, so look something like 1JA, 1LA, etc. When you have your build codes, you can input them into a "VW codes decoder" which will let you know what each one if all about. "VW codes decoder" http://igorweb.org/equidec.aspx As you can see below, the two example codes 1JA and 1LA have been decoded. Example of decoding 1JA = Shock absorbers, rear 1LA = Disc brakes, front

You can fit hatchback springs to your estate, but don't load the rear of your estate to the max. Perhaps about 100kg from the max. So 4 passengers and 75kg of luggage in the rear, or 5 passengers and no luggage in the rear. If you load it up to the max there's a risk of the rear suspension bottoming when going over big bumps in the road if you have hatchback rear springs on the rear of the estate version. The front hatchback springs will be the same as the front estate springs, so no problem there.