AlexBartlam Posted March 5, 2018 Share Posted March 5, 2018 hi all im after some newish alloys to swap for my second set i was diy restoring, but i cant find any decent ones in 16 inch diameter, but loads are popping up at 17 inch, how easy or cheap would it be to recal the speedo, or just not bother and wait till some pop up. thanks. Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted March 5, 2018 Share Posted March 5, 2018 You might find the rolling radius is almost identical with the lower profile tyres on the 17s so not an issue. I done it on the Focus with FoCCCus software in 2 minutes but not sure if there's an equivalent for the Fiesta yet. Quote Link to comment Share on other sites More sharing options...
AlexBartlam Posted March 5, 2018 Author Share Posted March 5, 2018 ah right, not sure i want to go lower profile than i already have. Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted March 5, 2018 Share Posted March 5, 2018 With an inch more rim you need to lose around an inch of tyre sidewall otherwise you'll get rubbing issues as well as speedo issues. The OE 17s are all lower profile than the 16s. Reduced comfort is the price you pay for better looks unfortunately. 1 Quote Link to comment Share on other sites More sharing options...
Luke4efc Posted March 5, 2018 Share Posted March 5, 2018 You might end up with clearance issues if you alter the overall diameter. The factory 17's already have steering rack limiters fitted. 1 Quote Link to comment Share on other sites More sharing options...
alexp999 Posted March 5, 2018 Share Posted March 5, 2018 10 minutes ago, Luke4efc said: You might end up with clearance issues if you alter the overall diameter. The factory 17's already have steering rack limiters fitted. That's due to width/depth of the wheel. I.e. how far in to the arch it goes. Ford nearly always have wider tyres and alloys for the largest OEM size. Quote Link to comment Share on other sites More sharing options...
cjay1 Posted March 5, 2018 Share Posted March 5, 2018 Forscan has options to adjust wheel size and rolling circumference not sure if this will calibrate the speedo but may be worth looking into. Quote Link to comment Share on other sites More sharing options...
AlexBartlam Posted March 6, 2018 Author Share Posted March 6, 2018 was looking to have some with a slight off set that could compensate for the extra circumference, what tyres would i need if i have 195/45/16 now what could hight would have to go to for 17's Quote Link to comment Share on other sites More sharing options...
Luke4efc Posted March 6, 2018 Share Posted March 6, 2018 57 minutes ago, AlexBartlam said: was looking to have some with a slight off set that could compensate for the extra circumference, what tyres would i need if i have 195/45/16 now what could hight would have to go to for 17's Oem Fiesta alloys (from an ST or Zetec-s)? They use 205/40/r17. Use this website to compare current vs new tyre sizes. 1 Quote Link to comment Share on other sites More sharing options...
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