which speedo gears for new tires

[fordranger95]

hey everyone.... i have a question... i have a 96 2.3 5 speed ranger it has 3.45 gears from the factory... my truck came stock with with 225/70/14 tires which is 26.4 inch tire height.. the new rims i have are 235/75/15 and are 28.88 inches high....

here is the tire difference here





with this change my speedo will be off..... how can i tell what speedo gear i need to change out.. i have no idea......

ive tried looking at this but it is very confusing to me

http://www.therangerstation.com/tech_library/Speedogear.html

someone please help me.... i dont want my speedo to be off...

 

[kimcrwbr1]

smaller gear for larger tires how does it act with the skinny pedal? If you lose alot of power you should a larger ring and pinion also 3.73 and black speedo gear works dead nuts on my ranger. Yea be careful on speed traps you will be going about 5-7 miles an hour faster than what your speedo says