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Title: Speedo Gears Post by: yackboy49 on February 08, 2022, 04:08:43 PM Just trying to determine which colour speedo gear I need, trimatic behind a 202 in an FC with 13 inch wheels. Existing speed is 10 mph fast. They range from 20 teeth to 24.
Regards YB Title: Re: Speedo Gears Post by: sgo on February 08, 2022, 06:44:24 PM Best to look at what colour/teeth you have now and start your calculations from there.
Title: Re: Speedo Gears Post by: ipg on February 08, 2022, 07:46:12 PM https://www.centauriaudio.com.au/tchc4878/speedocalc.html
Title: Re: Speedo Gears Post by: sgo on February 08, 2022, 08:37:43 PM For some reason I didn't have much success with the speedo calculators, but I think there's a 5% difference between each cog so if you know which one you have you can easily calculate what you need, or at least which is closest?
Title: Re: Speedo Gears Post by: Harv on February 09, 2022, 07:28:25 AM More information is needed to answer your question.
At what speed is the speedo out by 10mph? You need to convert 10mph into a percentage in order to change the teeth ratio by that percentage. What gears are currently in the car now? You then step up (or down) gear colours depending on what is in the vehicle. That ratio depends on both gears... not just the driven one. Drive gears (worm gears... hard to get at): brown: 6 teeth I cant remember: 7 teeth natural: 8 teeth greenish blue: 9 teeth yellow: 10 teeth Driven gears (easy to get at): pink: 19 teeth white: 20 teeth green: 21 teeth dark blue: 22 teeth red: 23 teeth yellow: 24 teeth light blue: 25 teeth Cheers, Harv Title: Re: Speedo Gears Post by: yackboy49 on February 11, 2022, 08:00:50 PM thanks lads for the info, bit of homework to do.
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