New Kumhos tracking badly
Submitted: Tuesday, Feb 26, 2008 at 17:25
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madfisher
Hi everyone just back from tassie. One problem I encountered going down the hume the new rear kumho(825 road venture) tyres were tracking badly wherever the surface was grooved somewhat from trucks. This ment almost constant correction. The vehicle is a 3.5 Jack and was loaded up with camping gear for a fortnight.
I have never encountered this problem before, and am interested in other peoples experiences
Best fuel economy for those interested was 11.6l100 or 8.6ks per l this was on the hume using cruise at 105
Cheers Pete
Reply By: pop2jocem - Tuesday, Feb 26, 2008 at 19:37
Tuesday, Feb 26, 2008 at 19:37
Hi Madfisher
Did I read your post correctly "new REAR Kumho,s tracking badly"
Do you have these on the front as
well? The reason I,m asking is that I have had certain tyres on the front that behaved in a similar fashion, as you say "tracking" but I have never experienced this from any rear tyre even with different brands on the left and right
I may be wrong but I have always been of the opinion that this problem was caused by the front.
Cheers Pop
AnswerID:
289520
Follow Up By: madfisher - Tuesday, Feb 26, 2008 at 20:43
Tuesday, Feb 26, 2008 at 20:43
Hi Pop,
This problem has only risen since I replaced the two rear tyres. The fronts are crap Hankooks ats, good road tyre . Their is no problem on smooth concrete roads, mostly the problem occurs in the left lane where the trucks run. Its like someone with a big hand gives the rear of the car a shake side to side
Thank you Pete
FollowupID:
554849
Reply By: disco driver - Tuesday, Feb 26, 2008 at 20:10
Tuesday, Feb 26, 2008 at 20:10
Hi Pete,
It's probable that the track of the Jack was just that bit different to the groove spacing on the road, this can cause the vehicle to wander around a bit as it rides on and off the grooves.
Does it do it all the time or just on poor road surfaces as you described?
In all probability it only happens when the road surface is showing signs of heavy traffic. Nothing to worry about.
Must admit that I know SFA about Jack's. Do they have a constant 4wd system?
If so, it's vaguely possible that the difference in tyre diameters (old on front and new on rear) could be winding up the transmission a bit and the resultant stress is causing the problem.
Disco.
AnswerID:
289530
Follow Up By: madfisher - Tuesday, Feb 26, 2008 at 20:46
Tuesday, Feb 26, 2008 at 20:46
Hi Disco thank you for your response. The Jack is part time 4wd. It only happens where the trucks have grooved the road.
Cheers Pete
FollowupID:
554851
Reply By: Member - Oldbaz. NSW. - Wednesday, Feb 27, 2008 at 17:06
Wednesday, Feb 27, 2008 at 17:06
G'day Pete, never experienced that with my Jack. Currently running BFG A/T on rear ,new, & nearly worn out Silverstone Highway Pattern on front. Hope you can cure it. Your fuel figures
are good. Have you done the restrictor thing? I can only manage
about 12L/100, driven gently (auto)....oldbaz.
PS...run 40 psi all round, all the time.
AnswerID:
289662
Follow Up By: madfisher - Wednesday, Feb 27, 2008 at 21:51
Wednesday, Feb 27, 2008 at 21:51
Hi Baz,
the problem only surfaced when I replaced the Hankooks on the rear. I was running 40psi as we were heavily loaded.
Yes I had the reststrictors removed some time ago and it isw a manual. 12s are good for an auto. If I had slowed to 90 I am sure it would have got under 11, but 800ks is a fair haul in one go so sat on 105 going down and 110 coming back.
Driving arround town today no problem, but I didnot drive down the highway(truck grooves) either.
Thanks for your response Pete
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