For some extra information about navigating the forum you can go to Forum Tips
Does your rig Cup the steer tire
Quote from AceinSav on September 16, 2020, 3:10 pmI wanted to throw this out there and just see what everyone is seeing with their rigs
If I had to pick one thing about having a sidecar that was a real pain and a strike against it I would have to say it is the front tire cupping
But I can't totally blame the sidecar as all 3 wings I have owned would at some point before the life of the tire was gone begin cupping
also I hear all the time and have had it happen that there is a slow speed headshake, all 3 of the ones I have had did both to some extent
even when running on 2 wheels
So is the cupping and headshake present on other bikes and if so to what extent
I wanted to throw this out there and just see what everyone is seeing with their rigs
If I had to pick one thing about having a sidecar that was a real pain and a strike against it I would have to say it is the front tire cupping
But I can't totally blame the sidecar as all 3 wings I have owned would at some point before the life of the tire was gone begin cupping
also I hear all the time and have had it happen that there is a slow speed headshake, all 3 of the ones I have had did both to some extent
even when running on 2 wheels
So is the cupping and headshake present on other bikes and if so to what extent
Quote from Peter Pan on September 16, 2020, 9:26 pmHello Ace,
what shall mean "cupping" the front tire? I never heard the term.
Low speed wobble is part of physical nature of rigs. My Jawa rig once whacked my right wrist that hard it ached for 4 days. For some reason you shall never lift off hands from the handle bar on rigs... (say that to newcomers who just switched from 2 to 3 wheels).
That the bike goes straight over a fully turned front wheel on steep hill climbs or on wet/dirty/iced road is due to that "the saint of holy static friction" can only do his job until a certain point. Or he can handle steering, or breaking but not all together under ugly conditions 😉
Sliding friction is only a infinite fraction of static friction. good point on the rig is that you are able to play with so many variables that where a car goes straight into the ditch, the rig you still can manage a lot with weight shift and some acrobatic. The main reason why I prefer a rig to a car in snow, ice and gravel. Plus have left a last resort: Take the Parachute!
Therefore: Never pass over 70% of the capability of tire adherence capability. And never ride faster then as far you are able to see and react.
Best: Keep your guardian angel happy.
Sven
Hello Ace,
what shall mean "cupping" the front tire? I never heard the term.
Low speed wobble is part of physical nature of rigs. My Jawa rig once whacked my right wrist that hard it ached for 4 days. For some reason you shall never lift off hands from the handle bar on rigs... (say that to newcomers who just switched from 2 to 3 wheels).
That the bike goes straight over a fully turned front wheel on steep hill climbs or on wet/dirty/iced road is due to that "the saint of holy static friction" can only do his job until a certain point. Or he can handle steering, or breaking but not all together under ugly conditions 😉
Sliding friction is only a infinite fraction of static friction. good point on the rig is that you are able to play with so many variables that where a car goes straight into the ditch, the rig you still can manage a lot with weight shift and some acrobatic. The main reason why I prefer a rig to a car in snow, ice and gravel. Plus have left a last resort: Take the Parachute!
Therefore: Never pass over 70% of the capability of tire adherence capability. And never ride faster then as far you are able to see and react.
Best: Keep your guardian angel happy.
Sven
Quote from Thane Lewis on September 17, 2020, 12:37 pmSome tires are more prone to "cupping" (uneven, patterned wear on a tire) in the first place.
Some tires are susceptible due to over or under inflation based on load.
Rigs will cause cupping because of the unbalanced forces inherent in them. One can minimize this by all the "tweaking" of settings to make the rig run "best" under specific conditions, but at the end of the day, forces are unbalanced and some level of uneven wear is going to occur.
I speak here as a physics teacher who wants to operate a sidecar rig and who is attempting to build his first rig, having read many hundreds of accounts from other Practitioners of Sidecar Dark Arts.
Some tires are more prone to "cupping" (uneven, patterned wear on a tire) in the first place.
Some tires are susceptible due to over or under inflation based on load.
Rigs will cause cupping because of the unbalanced forces inherent in them. One can minimize this by all the "tweaking" of settings to make the rig run "best" under specific conditions, but at the end of the day, forces are unbalanced and some level of uneven wear is going to occur.
I speak here as a physics teacher who wants to operate a sidecar rig and who is attempting to build his first rig, having read many hundreds of accounts from other Practitioners of Sidecar Dark Arts.
Quote from Tax Man on September 18, 2020, 9:12 amAce, I've not experienced cupping of the front tire on either the '81 Gold Wing or on the '98 Valkyrie. I've also not experienced front wheel wobble on either of those sidecar rigs. Both rigs had damping cylinders. I have experienced a wobble which became a "tank slapper" on a '65 Honda Dream 305, an experience I never want to repeat.
Ace, I've not experienced cupping of the front tire on either the '81 Gold Wing or on the '98 Valkyrie. I've also not experienced front wheel wobble on either of those sidecar rigs. Both rigs had damping cylinders. I have experienced a wobble which became a "tank slapper" on a '65 Honda Dream 305, an experience I never want to repeat.
Quote from doynebruner on September 18, 2020, 10:04 amTry the Avon Trike Tire, we have had good service with it.
Try the Avon Trike Tire, we have had good service with it.
Quote from Al Olme2 on September 18, 2020, 12:32 pmIn the realm of odd and probably totally unrelated facts... Rolls Royce's up until the late 1990's were known for cupping their front tires in just a few thousand miles. Go figure.
In the realm of odd and probably totally unrelated facts... Rolls Royce's up until the late 1990's were known for cupping their front tires in just a few thousand miles. Go figure.