Sizing Guide for Tires and Gear Ratio Selection

Post by **syncropaddy** » 23 Apr 2006, 12:06

A guy called Tim Smith did a lovely excel spreadsheet for a Sizing Guide for Tires and Gear Ratio Selection and I've lost it. Anyone know where I can find it again?

Post by **Macflai** » 23 Apr 2006, 13:00

That?

The page is

http://www.syncro.org/Tires.shtml

and in that same page

http://www.syncro.org/Files/syncrotirea ... tiosdd.xls

Hope that is what you ask for.

Post by **dink** » 23 Apr 2006, 13:00

these will help you work it out
first off there's a tyre size calculator, scroll down roughly half way
http://www.chris-longhurst.com/carbibles/index.html
this will give you estimated speeds
http://www.partsemporium.co.uk/rpm%20&% ... ulator.htm

Post by **HarryMann** » 23 Apr 2006, 13:36

Derek Drew has just sent me the latest syncrotireandgearratios spreadhseet optimiser which is going up on syncro website now, so will link Wiki to it as as well... later today. (sheet collaboratively prodced with Tim Smith et al)

N.B. Note that Derek focuses on very low diff ratio for rock crawling and scrabbling with large wheels and tyres (e.g. 6.18s) and attains cruising performance with large indirect ratio 3rd and top gears (non-standard usually) as he can get almost any gear ratio for 3rd and top made-up and has quite a wide range in stock.

Emailed attached: syncrotireandgearratios2.xls

Now in Wiki, stored in syncro website...

Syncro Wiki link