US Spec Mazda Driveline Ratios 15:50 Rear Net Tire RPM @ -Countershaft & Mainshaft Gear Teeth-- Vehicle Year 1st 2nd 3rd 4th 5th Axle Final Tire Size RPM 60 MPH C1 C2 C3 C4 C5 M1 M2 M3 M4 M5 Tooth Count Certainty or Notes 626 79-82 3.214 1.818 1.296 1.000 0.860 3.636 3.128 185/70-13 894 2796 14 22 27 30 31 27 24 21 18 16 B2000 82-84 4.359 2.519 1.507 1.000 0.875 3.308 2.894 B2000 Auto 82-84 4.359 2.519 1.507 1.000 0.875 3.900 3.413 B2200 82-84 4.359 2.519 1.507 1.000 0.875 3.900 3.413 B2x00 85-up 3.622 2.186 1.419 1.000 0.859 13 20 32 37 47 28 26 27 22 24 B2x00 Man4WD 87-88 Part # M054-27-110A ----> 4.444 fits RX-2, RX-3*, RX-7, RWD 626 thru 1985; Miata '94-up Cosmo 76 3.683 2.263 1.397 1.000 0.862 3.636 3.134 185/70-14 855 2680 14 22 28 32 33 29 28 22 18 16 100% Cosmo 77-78 3.380 2.002 1.390 1.000 0.791 3.636 2.877 185/70-14 855 2460 14 22 27 31 33 29 27 23 19 16 100% Cosmo 78.5 3.380 2.077 1.390 1.000 0.791 3.636 2.877 185/70-14 855 2460 14 22 27 31 33 29 28 23 19 16 100% R-100 70-72 REPU 74 3.683 2.263 1.397 1.000 4.625 4.625 7.35-14 792 3663 14 22 28 32 33 29 28 22 18 16 TRPM Estimated REPU Auto 74 3.683 2.263 1.397 1.000 4.375 4.375 7.35-14 792 3465 14 22 28 32 33 29 28 22 18 16 TRPM Estimated REPU 75 3.683 2.263 1.397 1.000 4.375 4.375 7.35-14 792 3465 14 22 28 32 33 29 28 22 18 16 TRPM Estimated REPU Auto 75 3.683 2.263 1.397 1.000 4.111 4.111 7.35-14 792 3256 14 22 28 32 33 29 28 22 18 16 TRPM Estimated REPU 76 3.683 2.263 1.397 1.000 0.862 4.111 3.544 7.35-14 792 2807 14 22 28 32 33 29 28 22 18 16 TRPM Estimated REPU 77-78 3.380 2.002 1.390 1.000 0.791 3.900 3.085 7.35-14 792 2443 14 22 27 31 33 29 27 23 19 16 TRPM Estimated RX-2 71-74 3.683 2.263 1.397 1.000 3.900 3.900 165-13 894 3487 14 22 28 32 33 29 28 22 18 16 TRPM Estimated RX-3 72-75 3.683 2.263 1.397 1.000 3.700 3.700 155-13 904 3345 14 22 28 32 33 29 28 22 18 16 TRPM Estimated RX-3 76 3.683 2.263 1.397 1.000 0.862 3.727 3.213 175/70-13 904 2904 14 22 28 32 33 29 28 22 18 16 RX-3 77-78 3.380 2.002 1.390 1.000 0.791 3.727 2.949 175/70-13 904 2665 14 22 27 31 33 29 27 23 19 16 RX-3 78.5 3.380 2.077 1.390 1.000 0.791 3.727 2.949 175/70-13 904 2665 14 22 27 31 33 29 28 23 19 16 RX-4 73-75 3.683 2.263 1.397 1.000 3.900 3.900 BR70-13 873 3405 14 22 28 32 33 29 28 22 18 16 TRPM Estimated RX-4 76 3.683 2.263 1.397 1.000 0.862 3.636 3.134 BR70-13 873 2736 14 22 28 32 33 29 28 22 18 16 TRPM Estimated RX-4 77-78 3.380 2.002 1.390 1.000 0.791 3.636 2.877 BR70-13 873 2511 14 22 27 31 33 29 27 23 19 16 TRPM Estimated RX-4 78.5 3.380 2.077 1.390 1.000 0.791 3.636 2.877 195/70-13 873 2511 14 22 27 31 33 29 28 23 19 16 Last updated 2008/01/03 15:30 (UTC-0500) US Spec Mazda Driveline Ratios 15:50 Rear Net Tire RPM @ -Countershaft & Mainshaft Gear Teeth-- Vehicle Year 1st 2nd 3rd 4th 5th Axle Final Tire Size RPM 60 MPH C1 C2 C3 C4 C5 M1 M2 M3 M4 M5 Tooth Count Certainty or Notes RX-7 79-83 3.674 2.218 1.433 1.000 0.825 3.909 3.227 185/70-13 892 2878 13 20 25 29 31 28 26 21 17 15 RX-7 83 3.674 2.218 1.433 1.000 0.825 3.909 3.227 195/60-14 891 2875 13 20 25 29 31 28 26 21 17 15 RX-7 auto 84 2.458 1.458 1.000 0.720 3.909 3.909 185/70-13 892 3487 RX-7 GSL-SE 84 3.622 2.186 1.419 1.000 0.758 4.083 3.097 205/60-14 878 2719 13 20 32 37 51 28 26 27 22 23 RX-7 84p 3.622 2.186 1.419 1.000 0.807 3.933 3.175 185/70-13 892 2832 13 20 32 37 50 28 26 27 22 24 RX-7 85 3.622 2.186 1.419 1.000 0.807 3.909 3.156 185/70-13 892 2815 13 20 32 37 50 28 26 27 22 24 RX-7 GSL-SE 85 3.622 2.186 1.419 1.000 0.715 4.077 2.914 205/60-14 851 2480 13 20 32 37 40 28 26 27 22 17 RX-7 mixed 85 3.622 2.186 1.419 1.000 0.697 4.444 3.099 205/55-14 910 2820 13 20 32 37 41 28 26 27 22 17 RX-7 Base 86-91 3.476 2.002 1.366 1.000 0.711 4.100 2.917 185/70-14 855 2494 15 21 32 37 52 31 25 26 22 22 RX-7 GXL 87-91 3.476 2.002 1.366 1.000 0.697 4.100 2.859 205/60-15 841 2404 15 21 32 37 41 31 25 26 22 17 RX-7 Turbo 87-91 3.483 2.015 1.391 1.000 0.719 4.100 2.948 205/55-16 828 2441 RX-7 Conv 88 RX-7 GTUs 89 3.476 2.002 1.366 1.000 0.758 4.300 3.261 205/55-16 828 2700 15 21 32 37 51 31 25 26 22 23 RX-7 93-95 3.483 2.015 1.391 1.000 0.719 4.100 2.948 225/50-16 829 2444 Miata 1.6L 90-93 3.137 1.888 1.331 1.000 0.814 4.300 3.501 185/60-14 910 3186 15 23 34 38 40 26 24 25 21 18 Miata 1.8L 90-97 3.137 1.888 1.331 1.000 0.750 4.100 3.076 185/60-14 910 2799 15 23 34 38 41 26 24 25 21 17 Miata 5-spd 99 3.136 1.888 1.330 1.000 0.814 4.300 3.500 185/60-14 910 3185 Miata 6-spd 99 3.760 2.269 1.645 1.257 1.000 3.909 3.295 195/50-15 913 3009 6th .843**** Miata 6-spd 05 3.760 2.269 1.645 1.257 1.000 4.100 3.456 205/45-16 910 3145 6th .843**** Miata auto 05 2.450 1.450 1.000 0.730 4.100 2.993 205/45-16 910 2724 Miata 5-spd 07 3.136 1.888 1.330 1.000 0.814 4.100 3.337 205/50-16 861 2874 Miata 6-spd 07 3.815 2.260 1.640 1.177 1.000 4.100 3.411 205/45-17 854 2913 6th .832**** Miata auto 07 3.538 2.060 1.404 1.000 0.713 4.100 2.386 205/50-16 861 2055 6th .582**** RX-8 auto 03 2.785 1.545 1.000 0.694 4.300 2.984 225/45-18 802 2393 RX-8 5-spd 03-08 3.483 2.015 1.484 1.000 0.762 4.444 3.387 225/55-16 808 2736 RX-8 6-spd 03-08 3.760 2.269 1.645 1.187 1.000 4.444 3.747 225/45-18 802 3005 6th .843****Japan only, 1.539 3rd RX-8 auto 08 3.538 2.060 1.645 1.187 0.713 4.300 2.503 225/55-16 808 2022 6th .582****