North American Turbocoupe Organization



New wheels going from 14in to 16
88turbomajor Offline
Member
#1
I'm looking at getting a Tbird Sport 5.0L and it comes with 14inch tires.  I want put 16 inch snowflakes on her and was wondering if I have to do anything else (speed gear change?)  I don't know.  Thanks!
1984 Mercury Cougar 5.0L LS Silver/Gray
Previous: 1988 Turbo Coupe
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BradM Offline
Member
#2
It depends on what tire size you select. This tool will give you speed changes. https://tiresize.com/calculator/
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1987 Thunderbird Turbo Coupe
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88Slowbird Offline
Member
#3
225 / 55 / 16 will equal out to about the same as the factory 215 / 70 / 14 and will make the speedo almost spot on
Black 1988 TC: RR Cam (with Esslinger cam gear), Stinger FMIC, Stinger 3" Exhaust, .60/.63 SVO Turbo, Pimp V1.4, Spartan2 Wideband
Mach 1 Red 1988 TC: All stock
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spittinfire Offline
Member
#4
It's not hard at all to change the speed gear and they don't cost much. I think you'll find that you'll likely end up staying close to the stock size anyway but I wouldn't let changing the speedo gear keep me from running a tire I wanted.
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88turbomajor Offline
Member
#5
(01-25-2022, 12:53 PM)spittinfire Wrote: It's not hard at all to change the speed gear and they don't cost much.  I think you'll find that you'll likely end up staying close to the stock size anyway but I wouldn't let changing the speedo gear keep me from running a tire I wanted.

Thanks!  I'm still looking but everyones input has been very helpful!
1984 Mercury Cougar 5.0L LS Silver/Gray
Previous: 1988 Turbo Coupe
Reply

88turbomajor Offline
Member
#6
(01-24-2022, 05:28 PM)88Slowbird Wrote: 225 / 55 / 16 will equal out to about the same as the factory 215 / 70 / 14 and will make the speedo almost spot on

Thank you Slowbird.  Easy peasy there....   That'll work!
1984 Mercury Cougar 5.0L LS Silver/Gray
Previous: 1988 Turbo Coupe
Reply

88turbomajor Offline
Member
#7
(01-24-2022, 04:42 PM)BradM Wrote: It depends on what tire size you select. This tool will give you speed changes. https://tiresize.com/calculator/

Thank you.  I didn't know that resource was available.
1984 Mercury Cougar 5.0L LS Silver/Gray
Previous: 1988 Turbo Coupe
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