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Laser Alignment Question
- Thread starter robmorg
- Start date
Cupping is when the center of the tire is worn more than the edges. Feathering is where the tire has a sharp edge on the tread. You notice feathering more as you run your hand across the tread.
Cupping is almost always due to over inflation and feathering is generally due to toe.
A LOT of people use feathering and cupping interchangeably for a feathering issue.
Either way, at 6100miles you've got something a bit "off". Especially if it's only on one wheel. The vibrations also suggest balance issues in some way.
Cupping is almost always due to over inflation and feathering is generally due to toe.
A LOT of people use feathering and cupping interchangeably for a feathering issue.
Either way, at 6100miles you've got something a bit "off". Especially if it's only on one wheel. The vibrations also suggest balance issues in some way.
Roadster Renovations
New member
This is the difference of feathering and cupping. Both can be either on the inner or outer tire. Haven't heard about the center wearing due to tow. When the tire is toed-in it will "skip" on it's edge. Same if toed-out on the outer edge. Mine were cupping and they were not overinflated. I run less that what BRP recommends. Also, negative camber will cause this also. That is when the ride height is too low and causing the top part of the tire to learn to the inside. That is why loaded standing height is so important.
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stillriding
happy old fart
Thanks Doc and Drew. Now the rest of the story. As I mentioned earlier, after the new tires were installed, my Spyder was shaking like an old washing machine and it was pulling to the right. Previously, the bike ran straight and steady. I got to thinking that perhaps my dealer really didn't high-speed balance the wheels, so today I went looking for a place with the necessary adapters for their balancer to get them balanced. To save a trip to my dealer. I ended up at a Polaris dealer and guess what? My left tie rod was loose! So loose that you could turn the jam nut by hand. Don't you think that this could have caused my rapid and uneven tire wear? And how dangerous was it? I suppose I should accept some responsibility for this, but how would I have known to look? Except for my dealer installing BajaRon's bar, nothing's been done in that area. Nothing except the laser alignment that I had done at Spyderfest LAST year. (It was not done by Squared Away.) And why didn't my dealer find it, if not when mounting new tires, during other service work performed by them? I always ask them to check everything. So my RTS is back at the dealer for a laser alignment. Plus the $45.00 spent at the Polaris dealer to get it safe and rideable to get home. Over 300-bucks that I shouldn't have had to spend. And I didn't even have time to sit in a Slingshot today!
GeorgiaBill
New member
This is the difference of feathering and cupping. Both can be either on the inner or outer tire. Haven't heard about the center wearing due to tow. When the tire is toed-in it will "skip" on it's edge. Same if toed-out on the outer edge. Mine were cupping and they were not overinflated. I run less that what BRP recommends. Also, negative camber will cause this also. That is when the ride height is too low and causing the top part of the tire to learn to the inside. That is why loaded standing height is so important.
Doc, I'm trying to decide whether to buy a Spyder and if so, which one. I've been reading a lot of posts and watching a lot of videos. You mentioned camber in your post, and I've been wondering about camber. I put a Hannigan sidecar on a GL1800 in 2006 and it had an Electric Camber Control which seemed necessary to get a level ride and keep the rig from pulling downhill. I adjusted camber relentlessly with every change in the road surface. If you have an opinion why some type of camber adjustment is not needed on the Spyder, I would appreciate reading that opinion.
Thanks
-Bill
Bfromla
Well-known member
Squared away said
Was close to change on my front fyi @ spyderfest so I asked squared away. & very direct reply was np only hitting objects ,potholes has the real effect of quickly undoing allingment. & even back here in Louisiana it seems to be holding well 7k miles later. Am looking to add as a yearly check up. (More spyderfest
hyea
. Fyi on my caged rides even if u rotate tires & avoid the worst roads you best ck 1a year or get new tires cuz its GONNA screw you up! Tend to see lot of highschool kids (& lazys) stuck on side of road where whole TIRE,Hub & all gave it up & BROKE OFF!nojoke:yikes:
opcorn: & of course the state does nothing but find ways to blame improper maintance:banghead:
Was close to change on my front fyi @ spyderfest so I asked squared away. & very direct reply was np only hitting objects ,potholes has the real effect of quickly undoing allingment. & even back here in Louisiana it seems to be holding well 7k miles later. Am looking to add as a yearly check up. (More spyderfest
hyea. Fyi on my caged rides even if u rotate tires & avoid the worst roads you best ck 1a year or get new tires cuz its GONNA screw you up! Tend to see lot of highschool kids (& lazys) stuck on side of road where whole TIRE,Hub & all gave it up & BROKE OFF!nojoke:yikes:opcorn: & of course the state does nothing but find ways to blame improper maintance:banghead:
