Yoshi Donating Members 136 Member For: 16y 21d Gender: Male Location: Knox Posted 07/09/09 11:09 AM Share Posted 07/09/09 11:09 AM Hi all, Just got some new rims put on over the weekend. Previously had stock 17's on and got 20's (225/35/20 93W) put on. My question is will my speedo need to be recalibrated? I know I should've done my research earlier...Damned impulse buying. Heres a pic of the new Rims.Thanks in advance. Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/ Share on other sites More sharing options...
Dagabond Bored Member Administrator 35,722 Member For: 22y 5m 29d Gender: Male Location: Dé·jà vu Posted 07/09/09 11:12 AM Share Posted 07/09/09 11:12 AM You'll probably be out 5K's or so... Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-930294 Share on other sites More sharing options...
Yoshi Donating Members 136 Member For: 16y 21d Gender: Male Location: Knox Posted 07/09/09 11:22 AM Author Share Posted 07/09/09 11:22 AM So I should sit 5k's under the speed limit and I should be sweet? Is there any way of checking if my speedo is out and by how much?Cheers Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-930303 Share on other sites More sharing options...
Dagabond Bored Member Administrator 35,722 Member For: 22y 5m 29d Gender: Male Location: Dé·jà vu Posted 07/09/09 11:27 AM Share Posted 07/09/09 11:27 AM Put a 17 on one side get her up on two wheels start the stop watch do a Uee flip her to the other side and cover the same distance...Or find one of the multiple over head speed readers on the freeways round town...not the ones that take your picture and send you the information in the mail though.... Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-930306 Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 3m 6d Gender: Male Location: SW Sydney Posted 07/09/09 11:30 AM Share Posted 07/09/09 11:30 AM OOOOrrrrrrrrrr......you could just get a navman, throw it in your car and check the speed according to the satellite compared to your speedo... Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-930307 Share on other sites More sharing options...
CHLAXN Donating Members 932 Member For: 16y 11m 21d Gender: Male Location: north QLD Posted 07/09/09 11:38 AM Share Posted 07/09/09 11:38 AM my spedo reads perfect with 20's doing over 100kmph or under according to my navman and tom tom Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-930312 Share on other sites More sharing options...
phil545 Member 47 Member For: 15y 7m 25d Posted 18/09/09 04:27 AM Share Posted 18/09/09 04:27 AM found this site - hopefully its accurate - http://www.miata.net/garage/tirecalc.html Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-934205 Share on other sites More sharing options...
winstor Member 611 Member For: 16y 2m 15d Posted 18/09/09 06:41 AM Share Posted 18/09/09 06:41 AM Your speedo will be 3.45% out. If your speedo was 100% accurate to start with, with your new rims and tyres when it reads 60km/h you are doing 62km/h. Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-934233 Share on other sites More sharing options...
bluute Cant wait to drive it Donating Members 884 Member For: 16y 10m Gender: Male Location: Golden Bay,WA Posted 18/09/09 11:08 AM Share Posted 18/09/09 11:08 AM (edited) im out by 3-4km/h according to my gps and the lovely police officer who pulled me over for doing a 103km/h with my cruise set to 100 Edited 18/09/09 11:09 AM by bluute Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-934335 Share on other sites More sharing options...
winstor Member 611 Member For: 16y 2m 15d Posted 18/09/09 11:26 AM Share Posted 18/09/09 11:26 AM Pulled you over for 103? Surely you didn't get a ticket... Link to comment https://www.fordxr6turbo.com/forum/topic/61411-20s-and-speedo-recalibration/#findComment-934341 Share on other sites More sharing options...
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