Brendan3006

Sorry Greg, I should have clarified the 5.4 & 5.3 refers to L/100kms and these convert to 52.32 and 53.31 MPG respectively. B

Hi Greg, I haven't noticed any change in performance at all. It may be a coincidence but the long-term average fuel consumption improved slightly from 5.4 to 5.3 since I changed to the 225/50/17's. The main change has been the vast improvement in the comfort and road noise levels. I'm only sorry I didn't change them sooner. Regards Brendan

Hi Guys, Having considered all the options I have eventually changed my tyres from the original 225/45/17 to 225/50/17's (Good Year Efficient Grip). My local tyre shop were very helpful and fitted these to try out while giving me the option of changing them back again within a day or two if they was any problem or if I wasn't happy. The new sized tyres transformed the car completely and now it feels and drives more quietly. It is vastly more comfortable on the road, and feels like a luxury vehicle should. The tyres also look much better while filling the wheel arch more and the car sits slightly higher. I can't understand why Lexus persist with fitting the lower profile tyres. I checked with my Insurers and they have no problem with the change. Also, I checked the speedo against my Sat Nav and an independent App on my Phone and both confirm the car's speedo is now accurate i.e. I have lost the manufactures built in leeway but I can live with that. Thanks for the previous advice.

Goodyear Efficient Grip (with a low noise rating of 67db)

Hi Guys, Having considered all the options I have eventually changed my tyres from the original 215/45/17 to 225/50/17's. My local tyre shop were very helpful and fitted these to try out while giving me the option of changing them back again within a day or two if they was any problem or if I wasn't happy. The new sized tyres transformed the car completely and now it feels and drives more quietly. It is vastly more comfortable on the road, and feels like a luxury vehicle should. The tyres also look much better while filling the wheel arch more and the car sits slightly higher. I can't understand why Lexus persist with fitting the lower profile tyres. I checked with my Insurers and they have no problem with the change. Also, I checked the speedo against my Sat Nav and an independent App on my Phone and both confirm the car's speedo is now accurate i.e. I have lost the manufactures built in leeway but I can live with that. Thanks for the previous advice.

My wife bought a 2015 CT with 40k miles six months ago and it has been flawless for the near 10k miles she has covered since. I've reset the MPG calculator three times in this period and it always returns to an average of 5.4 L/100kms which is around 52mpg. She typically uses the car for runs of about 10 to 20 miles at a time, nearly all of which are on rural roads. I use the car occasionally on longer motorway runs of c.80 miles and tend to drive it more aggressively and the average always stays the same. We would definitely highly recommend the CT and, in our opinion, it is far more refined than the C Class she has previously (which gave an amount of trouble too). The only complaint I have on the CT is the harshness and road noise from the 215/55/17 Yokohama's but I hope to address this by changing the brand of tyre and the size to 215/50/17 (previous threads refer).

Thank you all for the replies. The link to the tyre size calculator is very useful. A differential of 7 at 70MPH is too much alright and taken with the possible insurance issues it rules out this option. If I were to fit 215/50/17's the differential is a more acceptable 3.4 MPH and this might be more or less offset by the manufacturer setting the speedo to under read a little anyway. It's either this or change the rims to 16" altogether. Thanks again.

Thanks Yorky Pud. Good point about the speedo reading under, but I'm not too concerned about this as long as the 55 profile tyres don't catch the arches. Just wondering if anybody has changed to the 215/55/17.

Hi Guys, I'm new to the CT200h and to this Forum. I'd appreciate if anyone could help me with a query about tyre size on my 2015 CT, please. It currently has 215/45/17 Yokohamas, which are quite harsh and noisy on rough surfaces. I have considered changing to 16" wheels to help resolve the issue but my local tyre shop say I could fit 215/55/17's to try and address the problem. Does anyone know if this can be done without the tyres catching the arches etc? Your advice will be appreciated and thanks in advance.

Hi Guys, I'm new to the CT200h and to this Forum. I'd appreciate if anyone could help me with a query about tyre size on my 2015 CT, please. It currently has 215/45/17 Yokohamas, which are quite harsh and noisy on rough surfaces. I have considered changing to 16" wheels to help resolve the issue but my local tyre shop say I could fit 215/55/17's to try and address the problem. Does anyone know if this can be done without the tyres catching the arches etc? Your advice will be appreciated and thanks in advance.