Bob Denman
New member
Thanks! That makes for interesting reading; but none of it applies to the Spyder...
It loads it's suspension (and tires) in a way that is far more consistent with how an automobile would...
S.M.- I agree with what you said ( above ) 110 % and I have done the same to all my Spyders........But I am now totally confused as to what you were trying to convey in your post # 70 ????? ( sorry I can't put that up here My talents don't go in tis area ) :roflblack:
Mike,
I was just trying to explain why "BRP will always recommend installing OEM tires on all Can-Am Spyder Roadsters as this has an impact on the dynamic behavior of the unit (notably, the Vehicle Stability System). "
OEM tires are what the VSS is calibrated with. Sure they want us to only buy their tires, parts and accessories are a good source of revenue, and from a liability standpoint they CYA by suggesting only OE parts and accessories. I explained some of how the VSS is calibrated, just for helping others to make informed decisions. I have never heard from BRP any concerns with the bead and rim fit issues, that has never shown up in any tech documentation I am aware of. I am always trying to share what I learn and believe to be true and accurate. Again, so we all can make better informed decisions. That is the beauty of this forum!
That said, we know from this forum that there are many of us with hundreds of thousands of miles on non-OE tires on Spyders with little to complain about other than maybe wet traction issues. Other than the one brand slipping and rotating on the rims, I do not know of any real issues, perhaps those using the federal EVO tires up front that were made for drifter cars would be about the worst case of a poor application that I am aware of. I wouldn't use them. Ideally one wouldn't want to deviate too much from the OE tread pattern or sizes, we do want decent traction and ride quality, and we should be smart enough to not go too hard on the compound or too high on the pressures. No need to at the low vehicle weight. These are just opinions. Does that help? :dontknow:
If you will just read what I said, you will understand, It was stories not facts. I do not appreciate you insulting my intelligence level.As a fervent darksider I am always looking for problems with my choice to make sure that I am not at risk. Please back up your statement with specifics such as parties involved, Court citations, newspaper articles, or anything else of substance. Or is it the case that your brother's son in-law's uncle by marriage was at a Honda dealership and overheard a conversation where a friend of a friend heard of it in some random newspaper?
Or did you see it on the internet, so it must be true?
To date there have been no documented cases of insurance refusals, accidents as the result of car tire failure on a motorcycle, lawsuits, or any laws in the US that prevent the use of a CT on a motorcycle, and believe me, there are boards where this has been debated long and hard to the point of being ridiculous.
Just FYI, the way you link to a specific message is to click on the message number (39) in the thread, and then copy the URL that it produces. That picks up both the thread and the message number. In this case the proper link would be....This is as close as I can get. Here's the link, just scroll to 39:
http://www.spyderlovers.com/forums/showthread.php?76292-Kumho-tire-story/page2
I am a strong believer that one cannot be insulted without their permission. In saying that I will apologize if your sensibilities are a little more fragile than mine as I was not trying to insult your intelligence, I was only taking exception to the voracity of your post. Without additional information, or other corroboration, statements such as you made are meaningless to this discussion. It is even more egregious here since lawsuits of that nature leave a trail that if it were true, could be brought forth. Also, I did use the sarcasm font to show you my comments were tongue in cheek.If you will just read what I said, you will understand, It was stories not facts. I do not appreciate you insulting my intelligence level.
Oldmanzues
Very well said.My question would be if they are telling people the VSS on there 2013 Spyders with the soft compound tire would have to be calibrated for the old ,new tire they brought back.:dontknow:Not likely.I've had the Yokohama S-drive on now for 1500 km after the original wore out at 11,500 km[7200 miles] in normal use.S-drive 205/55/15 seems good with the limited km it's been on."BRP will always recommend installing OEM tires on all Can-Am Spyder Roadsters as this has an impact on the dynamic behavior of the unit (notably, the Vehicle Stability System). "
Here's the deal. When Bosch does the VSS calibrations on their test tracks in Germany they have to do so using a baseline set of tires and air pressures. The VSS is calibrated to these specifications. They do not waste time doing alternate calibrations on other tires, yes they could, but they do not.
This is not to say that other tires are going to automatically "screw up" the VSS. But it should be safe to assume that tires with vastly different traction and sidewall flex characteristics are going to force the VSS to act differently that it would with the OE selections. To what degree we do not know. From personal experience of so many miles with so many different tires and encounters with the VSS, I am personally satisfied with how it has performed with my choice of tires, but I am very selective on what I use.
Example, a Spyder with firmer tires at higher air pressures and/or a stiffer sway bar. Instead of allowing body roll (like it would with 2-ply tires and a soft sway bar), there will be more of a tendency for the vehicle to corner flatter, to a point, and then lift more abruptly. The VSS is still going to sense this lift and catch it, but realize the VSS algorithms are optimized for the baseline specifications. Does not render the VSS useless, but BRP and Bosch can not test every possible tire out there. Their obligation is to make sure it works as delivered.
Yet another consideration to front end lift would be the rear tire. Yes, the rear tire. If it allows a slight amount of side slip it will help to keep the front end down. If the rear tire is totally glued, the vehicle will lift the inside front tire more easily. Just like a snowmobile, three-point vehicle dynamics. This can be affected by ride height, rear spring preload, tire tread, air pressure, road surface, just something else to consider.
"Post 39 dated 01-07-15 by BRPCare (Steve) specifically says BRP does not tell any independent dealer what they can and cannot sell."
Well, that's not what my dealer says. They (a Honda/Yamaha dealer) just started selling Can-Am a couple of months ago (Yea! I don't have to go 100+ miles for service!). I went in to ask about a new rear tire (only 6500 miles on it), and they're hard over that BRP doesn't want them installing non-OEM tires on Spyders. Ain't happening. No way.
Maybe the word "independent" is a weasel word as used here?
If BRPCare (Steve)'s statement is correct, BRP should issue a dealer-wide memo apprising them of this fact. I don't think printing this thread out and showing it to the dealer is going to convince them.