Single wheel hop on fg
- Thread starter Andelles
- Start date
not sure if you are asking two different questions here, wheel hop (ie offroad in deep sand normally) and wheel balance (high speed highway)?
if so, yes i have both. larger dia tyres causes axle shafts to wind up slightly then release, normally only in soft sand or some other situation at very high torque. not a big drama, unless its big enough to snap the shaft. also partialy the reason for lots of bigger trucks running platetary reduction hubs.
my current wheels, 255/100R16 XZLs, i have balancing problems. this is entirely due to the wheel/tyre setup, nothing to do with the truck, obviously. i have a brand new $800 XZL that is 800grams out of balance. not happy jan. ironically, the worst tyre on the vehicle (has about 30% left and is very scalloped) balances perfectly...
if so, yes i have both. larger dia tyres causes axle shafts to wind up slightly then release, normally only in soft sand or some other situation at very high torque. not a big drama, unless its big enough to snap the shaft. also partialy the reason for lots of bigger trucks running platetary reduction hubs.
my current wheels, 255/100R16 XZLs, i have balancing problems. this is entirely due to the wheel/tyre setup, nothing to do with the truck, obviously. i have a brand new $800 XZL that is 800grams out of balance. not happy jan. ironically, the worst tyre on the vehicle (has about 30% left and is very scalloped) balances perfectly...
Aussie Iron
Explorer
I'm still using Balance beads (stainless steel) in mine and not having any trouble with them. Due to do a wheel rotate in a couple of weeks time , 12,000 Klms up then (do it every 6,000 and I'm rotating 6 tyres). Only have wheel hop when working hard on softer surface but certainly have less if I lower air pressure.
Dan.
My truck has toyo tyres very crapy ride over most roads bad tread wear hard to balance most roads mask
The hop balance problems But when the road becomes smooth sach as a new road the wheel hop is really
Noticable The weird thing is it comes in waves speed doesn't make any difference One person said that it was the
Air bags in bdoubles causing ripples in the roads I can understand in old roads but not in new roads that had just been laid. The other day I waz following a Bbouble my truck waz hopping along the back airbag axel on the bdouble
Wasn't moving it waz smooth .people say jut put up with it it's a truck there ruffffff I reckon the truck/ tyres
Have a problem but what to do next
engineer
Adventurer
1. Check your tie rod ends and make sure eveything (bearings and king pins) are still tight. Jack the wheel up and get someone to try and lever the wheel off to expose any movement
2. balance the wheels, rotataion of balance usually works best when done in the same direction of rotation on vehicle
3. fit a steering damper to the tie rod, will slow the shaking down 9 times out of 10
4. steering box, we wont even go there yet......
Best of luck mate, hope you sort it soon
2. balance the wheels, rotataion of balance usually works best when done in the same direction of rotation on vehicle
3. fit a steering damper to the tie rod, will slow the shaking down 9 times out of 10
4. steering box, we wont even go there yet......
Best of luck mate, hope you sort it soon
I went to a truck tyre place again today at eagle farm. This is the third lot of ppl trying to balance. They all say its the way the tyre has been seated as well as the steel rim. One guy told me it is very common with steel rims and they see most of the late model trucks all with the same problem. The put on 875g of lead and its still shaking.
blackduck
Explorer
I hate to tell you this ben but you might have to endure the mind numbing chore of getting them to break the bead and rotate the tyre through 180 deg on the rim, sometimes you get lucky and find that sweet spot
Of course im assuming your rims are true
had that problem with one of my 650's after a pot hole of ginormous proportions jumped in front of me
ended up with a slight twist of the rim
its now my spare and I rotate the other wheels left to right and insides to the front
of course you don't have insides
I had a problem with wheel hop in Sydney
but I think it might have been a pedestrian :wings:
Ahh that kind of a hop.. yea we had the exact same thing (i think) on our MAN.. Real temperamental, comes and goes at just about any speed over 50. Used to run 365/80r20 XZLs, would happen to any of those tyres on the front end. Brand new tyres would fix it, but would return soon after. Tyre shop couldn't balance it out. Can only figure it being due to the truck sitting and putting 'flat spots' in them.. but that theory has knobs on it too.. ie it doesn't always sit on the same spot of the tyre..
Now run 365/85s (still XZLs) which are same tread, same width but 2" taller and different load/speed rating. Dad drove it ~9000km to tas and back, no such dramas yet.
gait
Explorer
I have Toyos on the ATW single rims. No balancing necessary on first set or current set of tyres. Wheel alignment included a camber kit which cured slight pull to left. Wheel alignment guys also swapped fronts left to right "as it can sometimes be a problem".
I did have a kingpin bearing fail which scrubbed the fronts before I realised. Bad enough by the time I got to where I had the equipment to fix it wasn't worth trying to balance or drive on them. I replaced the tyres early.
I haven't noticed any wheel hop during reasonably normal use on all sorts of surfaces, either with original springs and shocks or parabolics. The limited slip diff seems to work well. It did wind itself up and bounce around a bit while trying to get out of sand once, but I had a cup of tea, got out the shovel, and let some more air out of the tyres.
Ride on bitumen is smooth enough I eventually noticed the slight wobble and slight to/fro under load from three sheared wheel studs (out of five). Yup, I know, I now have wheel nut indicators. I just have to remember to look! lol:
Just a thought, another source of wobble can be an out of balance drive shaft. Maybe check the center bearing.
And another thought ... tyre pressures
I did have a kingpin bearing fail which scrubbed the fronts before I realised. Bad enough by the time I got to where I had the equipment to fix it wasn't worth trying to balance or drive on them. I replaced the tyres early.
I haven't noticed any wheel hop during reasonably normal use on all sorts of surfaces, either with original springs and shocks or parabolics. The limited slip diff seems to work well. It did wind itself up and bounce around a bit while trying to get out of sand once, but I had a cup of tea, got out the shovel, and let some more air out of the tyres.
Ride on bitumen is smooth enough I eventually noticed the slight wobble and slight to/fro under load from three sheared wheel studs (out of five). Yup, I know, I now have wheel nut indicators. I just have to remember to look! lol:
Just a thought, another source of wobble can be an out of balance drive shaft. Maybe check the center bearing.
And another thought ... tyre pressures
Last edited:
Gees yov been lucky my truck had balance/ hop problems since day one .That was 2 years ago and still the problem exists.
How many Ks did you get? How did you tyres wear?I've basically tried most things eg.tyre pressure,rotating eg..
Basically had tits with it going to put the duals back on tomorrow and see if it actually the truck or the tyres once and for all.
How many Ks did you get? How did you tyres wear?I've basically tried most things eg.tyre pressure,rotating eg..
Basically had tits with it going to put the duals back on tomorrow and see if it actually the truck or the tyres once and for all.
gait
Explorer
lucky indeed, no punctures, no tyre/wheel problems (touch wood etc.). Just a few other problems!
About 4500 kg, even weight front to back. Drive relatively slowly for conditions (though that includes periods of 100 km/h on good motorways). Pressure 50-70 psi all round depending on road condition and speed. Lower for sand, corrugations, etc. Two tyres were at 55,000 km when kingpin failure stuffed things. I have two spares and had swapped so I didn't have four worn and two good. I would have been happy with 60,000 km and reckon I may have got 70,000 km - though they wouldn't have had much effective tread left would have been ok on seal in Europe. I replaced four as the price was right, they were available off the shelf, and I was off to play in the sand in Morocco.
Tyre wear has been very even (except when kingpin failed). Perhaps a hint of under-inflation but that really didn't show until around 50,000 km and difficult to find the "right" pressure for load, speed, ride and wear. I've run higher pressure since fitting parabolic springs. Also "heel and toe" wear typical of blocky tread for which I believe the only cure is rotation. I had wheels aligned, including camber kit installed and rear axle check, before leaving Aus. Checked after spring repairs, spring replacements, king pin bearing replacement.
Difficult to describe the meticulous wheel alignment in Brisbane. Very professional, heavy truck guys used to chasing 1% changes in fuel consumption. I've forgotten what it was that was bent but they found it after an hour or so and had the gear to straighten it. Camber decision was another hour. Good at telling me what they were doing and why. Fixed price. I hadn't felt anything wrong before but I could tell the difference after. Maybe our journey caught their imagination.
I also replaced front spring bushes before leaving Aus. They were again replaced about 25,000 km later when leaves replaced in Hungary. No symptoms, just worn.
If only I was so lucky with the brakes - stopping is a different sort of adventure every time.