Carlston

The Karoq 4WD size tyres are more comfortable than the Karoq 2WD size tyres because they are bigger, ie. 225/60R16 instead of 215/60R16, 225/55R17 instead of 215/55R17, 225/50R18 instead of 225/45R18, etc. Take a look at the alloy rim sizes on "skoda eshop cz" https://eshop.skoda-auto.cz/cs_CZ/hlinikove-disky/c/alloyWheels?sort=priceAsc&q=%3AscoreDesc%3AcarType%3AKaroq%2B%282017%2B%29&show=Page# You will see from the above link that the standard Karoq rim sizes are: 225/60R16 6Jx16 ET43 very comfortable 225/55R17 7Jx17 ET45 quite comfortable 225/50R18 7Jx18 ET45 not so comfortable 225/45R19 8Jx19 ET45 uncomfortable If you are interested in ride comfort avoid the 19" option. For best steering precision the 6Jx16 ET43 rim is a bit narrow for the relatively wide 225/60R16 tyre size but does improve ride comfort. Perhaps look at a wider 7Jx16 ET45 rim (from the Superb MK2 and Yeti) for the Karoq 4WD 225/60R16 tyre option. 225/55R17 and 225/50R18 fitted to 7J rims will be far more comfortable than 225/45R19 fitted to relatively wide 8J rims.

If you're lucky enough to have the 312mm or 314mm front brake discs on the Kodiaq, then cheap 215/70R16 tyres will fit with suitable rims. Although a non-standard size, it doesn't increase the performance compared to the standard 215/65R17 tyre size so shouldn't increase the insurance. This tyre size allows for the latest Vredestein Quatrac tyres which aren't available in sizes bigger than 16". It's also a more economical tyre size compared to the bigger 17" and 18" tyres. Vredestein Quatrac 215/70R16 100H https://www.camskill.co.uk/m139b0s12700p201645/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac_6_-_215_70_R16_100H_TL_Fuel_Eff_%3A_C_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_71dB The below rims would be suitable for the non-standard 215/70R16 tyre size on the Kodiaq. Notice that the colour of the 6.5Jx16 ET33 steel rim is silver rather than the more common black. 6.5Jx16 ET33 steel rim (from VW Tiguan MK1) https://www.mytyres.co.uk/rims/details?vehicleId=62269191771657328&rimCode=ALCAR9922 6.5Jx16 ET41 steel rim (from Superb MK3) https://www.mytyres.co.uk/rims/details?vehicleId=1037328747869009008&rimCode=ALCAR8426 Some Jaguar XJS cars were fitted with the similar 215/70R15 tyre size from 1981 until 1991 (1" smaller than 215/70R16) https://en.wikipedia.org/wiki/Jaguar_XJS#/media/File:Jagyar_XJS_V12_5343cc_September_1990_rear_three_quarters.jpg

340x30mm front brakes are very powerful. You might find that the limiting factor for the braking is not the brake calipers but the interface between the tyres and the road. By reducing the size of the front brake discs from 340x30mm to 314x30mm and fitting special lightweight forged 16" alloy rims it's possible to save over 30kg in unsprung weight compared to Skoda's 19" wheels. Even comparing the lightweight 16" option with 17" and 18" Skoda options, it's possible to save over 20kg in unsprung weight. 314x30mm front brake discs are fitted to mid-range Kodiaqs and some other VAG cars. They use the same calipers as the 340x30mm brake discs, so the only change needed to go from one size to the other is to swap the brake discs and brake disc caliper carriers. 314x30mm brake discs weigh about 9.4kg each, and 340x30mm brake discs weigh about 10.8kg each. Once you include the shorter brake caliper carriers, changing from 340x30mm to 314x30mm brake discs should save about 3kg in front unsprung weight. However, the biggest weight saving will be changing to 16" lightweight forged alloy rims such as the ones below. To get an idea of how heavy the standard Skoda 17", 18", and 19" alloy rims are, view the Superb MK3 alloy rims on "skoda eshop cz". The weights are often shown on the listings. For example, 19" Trinity alloy rims weigh a whopping 14.4kg each, which is almost double the weight of the lightweight forged alloy 16" rims shown below. 19" Trinity alloy rims weigh a whopping 14.4kg each Standard Skoda Superb MK3 alloy rims shown on "skoda eshop cz" https://eshop.skoda-auto.cz/cs_CZ/hlinikove-disky/c/alloyWheels?sort=priceAsc&q=%3AscoreDesc%3AcarType%3ASuperb%2BIII%2B%282015%2B%29&show=Page# It's no wonder so many Superb MK3 owners with big, heavy wheels fitted find that the standard shock absorbers get a little overwhelmed. Lots of unsprung weight has a very negative effect on handling, especially on bumpy roads. The below Audi 7Jx16 ET45 8D0601025K forged alloy rims only weigh 7.3kg each, and could take a 225/60R16 tyre size. 225/60R16 has about the same outside diameter as 245/45R18 and 245/40R19 tyre sizes which are non-standard tyre sizes that some Superb MK3 owners are using. Audi 7Jx16 ET45 8D0601025K forged alloy rims https://www.lllparts.co.uk/catalogs/audi/RDW/A4Q/224/6/601/601060

Take a photo of the white build code label in the spare wheel well area under the carpet, and post on this thread. It gives lots of details including the engine code. Even better is to get all the build codes, which you can get from a seller on ebay for about 3 Euros. Vin decoder that will show Factory Options audi vw seat skoda https://www.ebay.co.uk/itm/224631127243

The Octavia MK3 2.0 petrol RS 245HP uses red front and rear brake calipers that would fit, as it uses the same size 340mm front discs and 310mm rear discs. The Octavia MK3 2.0 diesel VRS facelift uses 312mm front discs, so front brake calipers for these won't fit. The Octavia MK3 2.0 petrol VRS 220HP and 230HP models and the Octavia MK3 2.0 diesel VRS use 272mm rear discs, so rear brake calipers for these won't fit. However, it would probably be a lot cheaper to paint your current brake calipers and brake caliper carriers as the only difference appears to be the colour of the paint. Octavia MK3 2.0TSI VRS 245HP 340mm front brakes (TRW brake system) Floating caliper brake version front red PR-1LG 1 5G0615123B Brake caliper housing left 1 PR-1LG 1 5G0615124B Brake caliper housing right 1 PR-1LG 6 5G0615125A brake carrier with pad retaining pin left 1 PR-1LG 6 5G0615126A brake carrier with pad retaining pin right 1 PR-1LG https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/805/6/615/615040 Octavia MK3 2.0 petrol VRS 245HP 310mm rear brakes (ATE brake system) Floating caliper brake for version: rear red PR-1KW 1 5F0615423 Brake caliper housing 1 1 5F0615424 Brake caliper housing 1 3 8U0615425A brake carrier with pad retaining pin left 1 3 8U0615426A brake carrier with pad retaining pin right 1 https://www.lllparts.co.uk/catalogs/skoda/CZ/OCT/805/6/615/615065

The 340x30mm front brakes and 310x22mm rear brakes appear to be functionally the same. There are cosmetic differences such as different paint colours and different badges, ie. Audi S3 badges. Why would you want Audi S3 badges on your brake calipers when it is fitted to a Skoda? Apart from the S3 brake calipers, you would also need matching brake caliper carriers if you wanted a cosmetic match. The Audi S3 brake calipers are available in glossy black or red. They don't appear to be easily available new or refurbished, and using secondhand ones wouldn't have that new look. Maybe just paint your Skoda brake calipers and brake caliper carriers. However, they soon get old and dirty looking so it seems a bit pointless unless the brake calipers are sticking or leaking and need rebuilding.

A new CR2025 should be higher than 3.0V, perhaps at least 3.3V.

It might do, because it's an old car and things can compound each other. For example, if an Earth was poor...then low voltage in combination with a poor Earth could lead to electrical problems. Things like ECUs and engine management systems can stop working properly when the voltage drops too low. It's a bit like a house smoke alarm. When the battery's voltage inside drops too low, it stops working. Measuring the voltage is also a really easy check, and something that I would do first. I use one of these to keep an eye on the car's battery voltage when I suspect the battery may be needing replacement and about to cause a car breakdown. Car cigarette LED voltmeter https://www.ebay.co.uk/itm/134175541274

What is the battery voltage after the engine hasn't been started for about 8 to 12 hours? You can measure from the cigarette lighter socket, but it's more accurate to measure directly from the battery terminals. It should be about 12.7 Volts. Something much lower, perhaps about 12.3 Volts would mean that the battery voltage is too low for a standard SLA (Sealed Lead Acid) car battery.

Measure the voltage of both batteries, to compare.

Maybe a garage could just replace the chain tensioner and keep the old chain. This would only make sense if it was the tensioner that caused the chain to slip rather than a worn chain and sprockets that caused the chain to slip. What mileage is the car?

What tyre sizes are listed inside the fuel filler flap?

Porsche tend to fit Standard Load tyres rather than Extra Load tyres as Original Equipment. If XL helped steering I expect Porsche would have fitted them.

If the car doesn't have stop/start then an AGM battery is not correct, and this may explain why the battery hasn't lasted very long. Varta C30 (smaller physical size than your current battery) https://www.varta-automotive.com/en-gb/products/varta-silver-dynamic/554-400-053 Varta D15 (same physical size as your current battery) https://www.varta-automotive.com/en-gb/products/varta-silver-dynamic/563-400-061

This photo of 17" rims fitted to 340mm front brakes was posted by Kenny R earlier on in this thread. Clearly, they do fit. wheel-size.com shows both the Superb MK3 2.0TSI 280PS and Superb MK3 2.0TSI 272PS with 17" rims. These cars both use 340mm front brakes. Skoda Superb 2018 2.0TSI – Generation: III B8 (3V) [2015 .. 2019] – Market: EUDM – Power: 276 hp | 206 kW | 280 PS – Engine: 2.0L, CJXA, I4, Petrol – Options: Ambition, Style, L&K, SportLine – Center Bore: 57.1 mm – PCD: 5x112 – Wheel Fasteners: Lug bolts – Wheel Tightening Torque: 140 Nm – Thread Size: M14 x 1.5 – Trim Production: [2015 .. 2019] Tire Rim 215/55ZR17 94W 7Jx17 ET40 2.3 / 2.1 235/45ZR18 94W 8Jx18 ET44 2.4 / 2.2 235/40ZR19 96W 8Jx19 ET44 2.5 / 2.3 255/30ZR20 93Y 9Jx20 ET35 2.6 / 2.4 Skoda Superb 2018 2.0TSI – Generation: III B8 (3V) [2015 .. 2019] – Market: EUDM – Power: 268 hp | 200 kW | 272 PS – Engine: 2.0L, I4, Petrol – Options: SE L Executive, Style, L&K – Center Bore: 57.1 mm – PCD: 5x112 – Wheel Fasteners: Lug bolts – Wheel Tightening Torque: 140 Nm – Thread Size: M14 x 1.5 – Trim Production: [2018 .. 2019] Tire Rim 215/55ZR17 94W 7Jx17 ET40 2.3 / 2.1 235/45ZR18 94W 8Jx18 ET44 2.4 / 2.2 235/40ZR19 96W 8Jx19 ET44 2.5 / 2.3 255/30ZR20 93Y 9Jx20 ET35 2.6 / 2.4 https://www.wheel-size.com/size/skoda/superb/2018/#trim-20tsi-eudm-276

According to ETRTO, 215/45R16 needs at least a 7J rim width. The 6.5Jx16 ET37 RS rims, are officially too narrow for this size tyre. An owner might have chosen 215/45R16 over 205/45R16 or 195/45R16 for appearances. 195/45R16 is by far the cheapest tyre size out of these three tyre sizes. 11 6Y0601025M Aluminium rim 6,5JX16 ET37 4 "RS" 6Y0601025M 7ZS chrome coloured metallic https://www.lllparts.co.uk/catalogs/skoda/CZ/FAB/225/6/601/601050 According to wheel-size.com the Fabia MK1 VRS the standard 16" tyre size is 195/45R16. However, wheel-size.com do often make mistakes, so check other information such as inside the fuel filler flap for the standard Skoda tyre sizes. Skoda Fabia 2004 1.9TDI – Generation: Mk1 (6Y) [1999 .. 2007] – Power: 129 hp | 96 kW | 131 PS – Engine: 1.9L, ASZ, BLT, I4, Diesel – Options: vRS – Center Bore: 57.1 mm – PCD: 5x100 – Wheel Fasteners: Lug bolts – Wheel Tightening Torque: unknown – Thread Size: M14 x 1.5 – Trim Production: [2003 .. 2007] Tire Rim 195/50R15 82V 6Jx15 ET43 2.2 / 2.3 195/45R16 82V 6.5Jx16 ET43 2.1 / 2.2 205/45R16 82V 6.5Jx16 ET45 2.1 / 2.2 205/40ZR17 82W 7Jx17 ET45 2.1 / 2.2 https://www.wheel-size.com/size/skoda/fabia/2004/#trim-19tdi-eudm-129

The brakes on the 1.8TSI are big. https://www.autodoc.co.uk/ate/958240?search=ATE Brake Disc (24.0325-0158.1)

Top photo shows standard 225/50R17, and bottom photo shows 235/55R17. 235/55R17 has an outside diameter 5.1% bigger than 225/50R17.

What size discs have you got? The Kodiaq has three different sizes of front brake discs: 312x25mm, 314x30mm, 340x30mm. The front brake systems on the Kodiaq are all TRW brake systems. Jurid on autodoc suggests that the Kodiaq 2.0TDI 150HP 4x4 has 314x30mm front brake discs. You can check by measuring the outside diameter of the front brake discs, or if you have build code 1LW that would show that you have 314x30mm front brake discs. TRW GDB2114 front brake pads (for Kodiaq 314x30mm front brake discs) £45.14 https://www.amazon.co.uk/TRW-GDB2114Â-Brake-Pad-disc-brake/dp/B06XYN4994/ref=sr_1_1?crid=YKZWU3H5E8H1&keywords=trw+gdb2114&qid=1664803916&qu=eyJxc2MiOiIwLjA4IiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=trw+gdb2114%2Caps%2C74&sr=8-1 ATE brake discs are coated, whereas TRW brake discs are painted. Coated brake discs should give better protection from rust. ATE 24.0130-0220.1 314x30mm front brake discs https://www.autodoc.co.uk/ate/7005983 Kodiaq parts catalogue https://www.lllparts.co.uk/catalogs/skoda/CZ/KOD/804/6/615/615010

What brand was the spring that broke after just three years?

What is your current tyre size and rim size? If you're on 165/70R14 fitted to 5Jx14 ET35 rims, there are some non-standard tyre options for those rims. 175/65R14, 185/60R14, 185/65R14, etc. Perhaps 175/65R14 would be the pick of the bunch because it's a common and cheap tyre size and will be a good fit for the 5J rims. The Skoda Citigo also uses 165/70R14 and 175/65R14 on it's 5J rims. Vredestein Quatrac 5 175/65R14 82T https://www.camskill.co.uk/m137b0s7975p134030/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac5_Vredestein_Quatrac_5_-_175_65_R14_82T_TL_Fuel_Eff_%3A_D_Wet_Grip%3A_C_NoiseClass%3A_B_Noise%3A_69dB The 175/65R14 tyre size will give you a much better ride than many of the 15" tyre sizes such as 195/50R15. If you like 195's, then 195/60R14 fitted to a 6Jx14 ET43 rim will give you a much better ride than 195/50R15. However, 195/60R14 is not a common tyre size and considerably more expensive than the common and plentiful 175/65R14 tyre size. Vredestein Quatrac 5 195/60R14 86H https://www.camskill.co.uk/m137b0s7982p144833/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac5_Vredestein_Quatrac_5_-_195_60_R14_86H_TL_Fuel_Eff_%3A_D_Wet_Grip%3A_C_NoiseClass%3A_A_Noise%3A_69dB

ROTARE 7Jx17 ET46 https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-rotare-17-pro-octavia-iv/p/5E3071497C+8Z8 225/50R17 would work really well on the 7Jx18 ET46 rim. 225/50R17 is a cheaper and more common tyre size than the 225/45R18 tyre size. 225/50R17 fitted to a 7J rim will be noticeably more comfortable than 225/45R18 fitted to a 7.5J rim. The below tyre would work well in the summer, ie. it's not a winter or all-season tyre as it doesn't have the 3PMSF symbol, so has limited traction in the snow. For best comfort it's important to avoid UHP summer tyres or other tyres that could have stiff sidewalls, and not to over-specify the tyre's load index or speed index. Using a 98 load index instead of a 94 load index will make the tyre's sidewalls stiffer and therefore the ride harder. Using V, W, Y speed indexes if you only need H will again make the sidewalls stiffer and therefore the ride harder. Notice that the below Michelin has a remarkably low noise rating, only 68dB. Using 225 tyres instead of 205 tyres can sometimes increase the noise levels, but the below tyre was carefully chosen by Audi as standard fitment to one of its cars. If you are going to use the tyres all year round and need good winter performance in snow and cold rain, it would be better to look at all-season tyres, as they work much better than summer tyres when the temperature drops below about 7 degrees Centigrade. Michelin Primacy 3 225/50R17 94H (Euro label B A 68dB) AO (Audi Original Equipment) https://www.camskill.co.uk/m54b0s7818p139463/Michelin_Tyres_Car_Michelin_Primacy_3_-_225_50_R17_94H_(AO)_TL_Fuel_Eff_%3A_B_Wet_Grip%3A_A_NoiseClass%3A_A_Noise%3A_68dB https://www.blackcircles.com/catalogue/michelin/primacy-3/225/50/R17/H/94/m?tyre=35021323 Michelin winter tyres will often last considerably longer than most other brands of winter tyres, ie. more miles before they wear out. Michelin Alpin 6 225/50R17 94H (Euro label D B 69dB) Winter tyres https://www.camskill.co.uk/m97b0s1472p158249/Michelin_Tyres_Winter_Snow_Car_Michelin_Alpin6_Michelin_Alpin_6_-_225_50_R17_94H_TL_Fuel_Eff_%3A_D_Wet_Grip%3A_B_NoiseClass%3A_A_Noise%3A_69dB For the 225/50R17 tyre size, 7Jx17 ET45 alloy rims from the Octavia MK3 and Yeti could be used instead of the 7Jx17 ET46 rims from the Octavia MK4. The specification of these rims are almost identical with just a 1mm different in ET number, ie. ET45 instead of ET46. This is so close, that when fitted you wouldn't notice the difference. NIVALIS 7Jx17 ET45 alloy rim (from the Octavia MK3 Scout) https://eshop.skoda-auto.cz/cs_CZ/kolo-z-lehke-slitiny-nivalis-17-pro-octavia-iii/p/5E0071497F+HA7

205/60R16 are slightly undersize on the Superb MK3. One of the owner's manuals only mentioned 215/60R16 and 215/55R17 tyre sizes for use with snow chains. 215/55R17 tyres have an outside diameter 2.4% bigger than 205/60R16. wheel-size.com do often make mistakes, so do check your owner's manual.

The outside diameter of 205/55R16 is too small for the Superb MK3. Have you considered using all-season tyres all year round, such as Michelin CrossClimate 2 ?

The Octavia MK2 uses 205/55R16 tyres fitted to 6.5Jx16 ET50 rims. The Octavia MK3 uses 205/55R16 tyres fitted to 6.5Jx16 ET46 rims. The Superb MK3 uses 215/60R16 tyres fitted to 6.5Jx16 ET41 rims. Outside diameter 205/55R16 631.9mm 215/60R16 664.4mm Therefore, 215/60R16 has an outside diameter 5.1% bigger than 205/55R16. So if you use 205/55R16 instead of 215/60R16, the outside diameter of the tyres will be too small.