Thursday, Jun 05, 2003 at 20:05
IAMGQ MTRs have 15mm tread depth at new 285/75X16
I did promise the
forum an objective comparison of MTRs and BFG MTs KM series after
simpson desert run but MTRs did not get out west
However update so far is that MTs have done 33 000ks and still have between 12 and 13 mm left (had 16mm originally) MTRs yet to be measured after 8,000 ks, Both tyres similar in performance and wet weather handling, we think the BFGs slightly better in mud. MTRs have stronger side wall but seem to be easier to roll off the rim at low pressure (see below) (possibly due to the stiffer walls ).
Have experimented a lot with tyre pressures in both sand and mud (very controlled circumstances and close to
home) and really tested the limits . Cant beat lower tyre pressure for increasing footprint and hence traction in all tough terrain, but you have to determine your own limits, vehicle weight, and
check how the tyre looks.
18PSI fairly safe for most situations (sand Mud) but if really stuck 14-15 psi can make a lot of difference. 10 -12 PSI great for traction but very real risk of tyre roll off.
We tested 2 patrols and tyre pressure on a wet short muddy
hill neither could climb with pressures over 15PSI
Managed to roll an MTR off the rim (front driverside GU 4.2td with difflock and didnt make it up the
hill)at 12 PSI. While the BFGs at 10 PSI (32X11.50R 15s on GQ petrol - NO difflock) climbed the
hill several times very slippery muddy
hill with deep washouts, Not a fair comparison (as BFGs were down to 10 psi and looked like theyd climb a wall) and also due to weight difference and extra revs petrol had over diesel but thats - what happened.
Wont
bore you with any other details but theres lots more observations if anybody is interested.
kes
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