PR4's are for sale in San Jose now.
The oem rear tyre is 160/70-17 won't fitting the 170/60-17 affect the abs in some way? the little bit of extra width shouldn't be an issue,but doesn't the 10mm height difference or whatever it is affect the relative wheels speeds and therefore the abs system? maybe I'm totally wrong, just asking the question.Front 120/70-18
Rear 170/60-17
Doubtful that will affect ABS...... the difference would have to be greater than that.The oem rear tyre is 160/70-17 won't fitting the 170/60-17 affect the abs in some way? the little bit of extra width shouldn't be an issue,but doesn't the 10mm height difference or whatever it is affect the relative wheels speeds and therefore the abs system? maybe I'm totally wrong, just asking the question.
I've looked around and going by what others use, and what's available at the different tire stores, decided on those sizes. It really didn't occur to me that the ABS would be affected. But my thinking is that the computer will measure the timing of the rotation of both wheels and all will be good. Not aware of what difference in tire size would need to have to mess up the ABS system. My guess is that if it's too out of whack on the initial base line, when you first roll the bike after start-up, the system would not be active and the dash light would stay lit. But I'm sure there are others here that can answer more technically.The oem rear tyre is 160/70-17 won't fitting the 170/60-17 affect the abs in some way? the little bit of extra width shouldn't be an issue,but doesn't the 10mm height difference or whatever it is affect the relative wheels speeds and therefore the abs system? maybe I'm totally wrong, just asking the question.
Hi Broc,,,see my post in your other thread.Thanks guys,not sure myself,I have discovered that the way it works I think,
the oem tyre is 160/70-17 therefore the sidewall height is 70% of 160 which is 112mm?
the pr3 is 170/60-17 then the sidewall height is 60% of 170 which is 102mm,
that means there's a 10mm difference in tyre height.
I don't know enough about it,hopefully some wiser heads on here eg Uncle Phil will have an answer.
It's a pity it's so hard to find the 160/70-17 tyre size,the only ones I can find over here are Metzeler Z6's and bt023's
Actually the difference would be 20mm if the ratio was exact which it usually is not since it is the distance from rim to tread x 2 + 17 = total height.Thanks guys,not sure myself,I have discovered that the way it works I think,
the oem tyre is 160/70-17 therefore the sidewall height is 70% of 160 which is 112mm?
the pr3 is 170/60-17 then the sidewall height is 60% of 170 which is 102mm,
that means there's a 10mm difference in tyre height.
I think this link posted by Uncle Phil in a different thread clears it up, http://api.viglink.com/api/click?format=go&key=43600dbd4d29bf22b89bb438534c545e&loc=http://www.st-owners.com/forums/showthread.php?128221-Michelin-PR3-on-ST1100-Rear-smaller-size-OK/page3&highlight=&v=1&libId=f3b393b9-0db0-4c85-8594-f5fd955d22bb&out=http://www.tacomaworld.com/forum/tirecalc.php?tires=170-60r17-160-70r17&ref=http://www.st-owners.com/forums/search.php?searchid=3795720&title=Michelin PR3 on ST1100 Rear - smaller size OK? - Page 3&txt=http://www.tacomaworld.com/forum/tir...0r17-160-70r17&jsonp=vglnk_jsonp_13884312213749Actually the difference would be 20mm if the ratio was exact which it usually is not since it is the distance from rim to tread x 2 + 17 = total height.
The game is changing. http://www.motorcyclistonline.com/features/no_drop_antilock_mc_garage/?fb_action_ids=10201542775026338&fb_action_types=og.recommends&fb_ref=.UsGOl_jpLVU.like&fb_source=other_multiline&action_object_map=[637007603023313]&action_type_map=["og.recommends"]&action_ref_map=[".UsGOl_jpLVU.like"]It's the circumference that counts as far as ABS is concerned...
That looks like a great system,could be a lifesaver,I was just looking back at the original promotional adds for my VFR800fi 98-01 series, the combined braking system was the latest thing,and the reviewers were saying it was as good as abs,with the bike squatting down when the brakes were hammered on,The game is changing
+1Hmmm... I already loose grip in transitions with the PR3 rear, not sure the PR4 rear is a step in the right direction for me.
I don't mind the relatively consistent, predictable little steps the rear takes when way over on the edge, nearing it's limits - by far the lesser of the evils IMO.+1
I find the rear tire wants to 'skip' slightly when pushed.