ian81 Posted September 11, 2019 Share Posted September 11, 2019 Our Challenger on a Ford base was originally fitted with 215 75 R16 typres. Last year we had a mix up in Latvia resulting in 225 75 R16 being fitted on the back and the existing back 215's tyres moved to the front. All has worked well!! I now need to replace the front. What is the best approach? Do I buy a pair of 215's? If so will it be best to mount on the front or the back? Or fit another pair of 225's? (The spare is a 215) Any thoughts gratefully received. Link to comment Share on other sites More sharing options...
Clive_Adams Posted September 11, 2019 Share Posted September 11, 2019 Personally if the 225’s you have are the correct weight rating I would go for another 2 the same, your are lucky with the profile being the same (70) or this may have caused you problems with your speedometer and odometer. If you have to use the spare at anytime just go carefully till you get the other sorted. I would put the newest on the drive wheels although if the others are only 12 months old shouldn’t make too much difference Link to comment Share on other sites More sharing options...
Billggski Posted September 11, 2019 Share Posted September 11, 2019 Couple of nerdy points. The profile (75) is a percentage of the width, so a 225 will have a marginally larger circumference than a 215. Not enough to worry about. The advice from tyre specialists is to always put the newest tyres on the rear, as a rear wheel skid is much easier to control than front wheels losing grip. No matter which axle is driven. 225 on both axles seems logical. Link to comment Share on other sites More sharing options...
crocs Posted September 11, 2019 Share Posted September 11, 2019 Billggski - 2019-09-11 4:34 PM Couple of nerdy points. The profile (75) is a percentage of the width, so a 225 will have a marginally larger circumference than a 215. Not enough to worry about. The advice from tyre specialists is to always put the newest tyres on the rear, as a rear wheel skid is much easier to control than front wheels losing grip. No matter which axle is driven. 225 on both axles seems logical. To add to the nerdiness. If a rear wheel skid is much easier to control than front wheels losing grip, does that not suggest that the newest tyres should be on the front? Link to comment Share on other sites More sharing options...
Keithl Posted September 11, 2019 Share Posted September 11, 2019 crocs - 2019-09-11 5:16 PM Billggski - 2019-09-11 4:34 PM Couple of nerdy points. The profile (75) is a percentage of the width, so a 225 will have a marginally larger circumference than a 215. Not enough to worry about. The advice from tyre specialists is to always put the newest tyres on the rear, as a rear wheel skid is much easier to control than front wheels losing grip. No matter which axle is driven. 225 on both axles seems logical. To add to the nerdiness. If a rear wheel skid is much easier to control than front wheels losing grip, does that not suggest that the newest tyres should be on the front? NO!!! Bill got his facts back to front! "A front wheel skid is much easier to control than the rear wheels losing grip." If the rear wheels let go then you will be facing where you came from before you can blink. If the fronts let go then you will normally continue travelling in a straight line. Keith. Link to comment Share on other sites More sharing options...
crocs Posted September 11, 2019 Share Posted September 11, 2019 Keithl - 2019-09-11 6:21 PM crocs - 2019-09-11 5:16 PM Billggski - 2019-09-11 4:34 PM Couple of nerdy points. The profile (75) is a percentage of the width, so a 225 will have a marginally larger circumference than a 215. Not enough to worry about. The advice from tyre specialists is to always put the newest tyres on the rear, as a rear wheel skid is much easier to control than front wheels losing grip. No matter which axle is driven. 225 on both axles seems logical. To add to the nerdiness. If a rear wheel skid is much easier to control than front wheels losing grip, does that not suggest that the newest tyres should be on the front? NO!!! Bill got his facts back to front! "A front wheel skid is much easier to control than the rear wheels losing grip." If the rear wheels let go then you will be facing where you came from before you can blink. If the fronts let go then you will normally continue travelling in a straight line. Keith. I agree. Link to comment Share on other sites More sharing options...
Conrad Posted September 11, 2019 Share Posted September 11, 2019 Don't want to be nerdy (!) but......there may be a reason why 216 years of Ford building motors led them to think original size was best for your van! More seriously, if you skid (front or rear!) your insurance company will find any reason to not pay up, such as non-standard wheels.You may not even be legal with different sizes front and rear. Are the 225 ones actually any better? Link to comment Share on other sites More sharing options...
ian81 Posted September 11, 2019 Author Share Posted September 11, 2019 Thanks everyone for comments nerdy and otherwise. When it happened the guy in Riga ran it through a tyre calculator and said the difference was less than 5% although I couldnt understand what differnce it would mak at the back end! Will probably opt for 215's on the front end as we rarely go abovee 55mph and even slower int the rain! Thanks to all. Link to comment Share on other sites More sharing options...
Billggski Posted September 11, 2019 Share Posted September 11, 2019 As I said, it's not me saying the new tyres should be fitted on the rear. It's the tyre industry. Why do non experts give dangerous advice without checking the facts? I suppose that's the nature of social media. https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=52 Link to comment Share on other sites More sharing options...
Keithl Posted September 11, 2019 Share Posted September 11, 2019 Bill, I WAS agreeing with your putting new tyres on the rear, I was just disagreeing with your reasoning! You had your front and rear skids mixed up! Keith. See the VBH video on this link https://www.etyres.co.uk/tyre-new-on-rear/ Link to comment Share on other sites More sharing options...
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