larger tyres on my brumby

josh b · Post by **josh b** » Thu Sep 09, 2010 11:32 am

I have noticed some of you have replaced the standard 13 inch tyre on a brumby with either a 14inch or 15inch. Can some one tell me the difference in performance you will get with these changes.

Post by **TOONGA** » Thu Sep 09, 2010 11:59 am

the main reasons for replacing the 13's with bigger tyres (14/s 15/s) are ground clearance , road handling and to some degree looks

at the same time most people put a 2 inch lift kit or bigger in to stop tyres rubbing on the guards and body.

I had a wagon years ago that had 14 inch rims with 185r light truck tyres on it and no lift kit I know of people who have 195/65/14 tyres with no lift as well

it is worth doing

TOONGA

steptoe · Post by **steptoe** » Thu Sep 09, 2010 1:22 pm

ground clearance ? I must have imagined I got extra clearance with my 14"s and with my 15" with 195 50 (for looks and handling) they measure (in the tyre books) to be almost same as thirteens but just that bit more to give spot on speedo readings V GPS

josh b · Post by **josh b** » Thu Sep 09, 2010 2:49 pm

yes but due to the increace of circumference of tyre does it effect acceleration or top speed of the car

Post by **TOONGA** » Thu Sep 09, 2010 2:58 pm

josh b wrote:yes but due to the increace of circumference of tyre does it effect acceleration or top speed of the car

http://www.miata.net/garage/tirecalc.html

this should answer any tire questions you have

for the record Ive got 215/65/14r tyres on my brumby with a 5 speed liberty AWD box and at 110km/h Im doing around 115km/h (speedo reading)

with my old box (dual range brumby box) I was doing closer to 125km/h at 110 km/h (speedo reading)

TOONGA